Network Working Group K. Tesink, Editor

Network Working Group K. Tesink, Editor
Request for Comments: 2515 Bell Communications Research
Obsoletes: 1695 February 1999
Category: Standards Track

Definitions of Managed Objects
for ATM Management

Status of this Memo

This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1999). All Rights Reserved.

Table of Contents

1 Abstract ............................................. 2
2 The SNMP Network Management Framework ................. 2
3 ATM Terminology ....................................... 3
3.1 VCL/VPL and VCC/VPC ................................. 3
3.2 PVC, SVC and Soft PVC ............................... 5
3.3 Traffic Management Parameters ....................... 6
3.3.1 Traffic Policing and Traffic Shaping Parameters
.................................................... 6
3.3.2 Cell Loss Priority ................................ 6
3.3.3 QoS Class ......................................... 6
3.3.4 Service Category .................................. 7
3.4 Max Active and Max Current VPI and VCI Bits ......... 7
4 Overview .............................................. 8
4.1 Background .......................................... 8
4.2 Structure of the MIB ................................ 9
4.3 ATM Interface Configuration Table ................... 9
4.4 ATM Interface DS3 PLCP and TC Layer Tables .......... 9
4.5 ATM Virtual Link and Cross-Connect Tables ........... 9
5 Application of MIB II to ATM .......................... 10
5.1 The System Group .................................... 10
5.2 The Interface Group ................................. 10
5.2.1 Support of the ATM Cell Layer by ifTable .......... 10
6 Support of the AAL3/4 Based Interfaces ................ 12
7 Support of the AAL5 Managed Objects ................... 12
7.1 Managing AAL5 in a Switch ........................... 12

Tesink Standards Track [Page 1]

RFC 2515 ATM Management Objects February 1999

7.2 Managing AAL5 in a Host ............................. 14
7.3 Support of AAL5 by ifTable .......................... 15
7.4 Support of Proprietary Virtual Interface by ifT-
able ............................................... 16
7.5 AAL5 Connection Performance Statistics Table ........ 17
8 ILMI MIBs and the ATM Managed Objects ................. 18
9 Definitions ........................................... 20
10 Acknowledgments ...................................... 83
11 References ........................................... 83
12 Security Considerations .............................. 85
13 Author's Address ..................................... 85
14 Intellectual Property ................................ 86
15 Full Copyright Statement ............................. 87

1. Abstract

This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes objects used for managing ATM-based
interfaces, devices, networks and services.

This memo replaces RFC 1695 [24]. Changes relative to RFC 1695 are
summarized in the MIB module's REVISION clause.

Textual Conventions used in this MIB are defined in [6] and [19].

2. The SNMP Network Management Framework

The SNMP Management Framework presently consists of five major
components:

0 An overall architecture, described in RFC 2271 [1].

0 Mechanisms for describing and naming objects and events
for the purpose of management. The first version of this
Structure of Management Information (SMI) is called SMIv1 and
described in STD 16, RFC 1155 [2], STD 16, RFC 1212 [3] and RFC
1215 [4]. The second version, called SMIv2, is described in RFC
1902 [5], RFC 1903 [6] and RFC 1904 [7].

0 Message protocols for transferring management information. The
first version of the SNMP message protocol is called SNMPv1 and
described in STD 15, RFC 1157 [8]. A second version of the SNMP
message protocol, which is not an Internet standards track
protocol, is called SNMPv2c and described in RFC 1901 [9] and
RFC 1906 [10].

Tesink Standards Track [Page 2]

RFC 2515 ATM Management Objects February 1999

The third version of the message protocol is called SNMPv3 and
described in RFC 1906 [10], RFC 2272 [11] and RFC 2274 [12].

0 Protocol operations for accessing management information. The
first set of protocol operations and associated PDU formats is
described in STD 15, RFC 1157 [8]. A second set of protocol
operations and associated PDU formats is described in RFC 1905
[13].

0 A set of fundamental applications described in RFC 2273 [14] and
the view-based access control mechanism described in RFC 2275
[15].

Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the mechanisms defined in the SMI.

This memo specifies a MIB module that is compliant to the SMIv2. A
MIB conforming to the SMIv1 can be produced through the appropriate
translations. The resulting translated MIB must be semantically
equivalent, except where objects or events are omitted because no
translation is possible (e.g., use of Counter64). Some machine
readable information in SMIv2 will be converted into textual
descriptions in SMIv1 during the translation process. However, this
loss of machine readable information is not considered to change the
semantics of the MIB.

3. ATM Terminology

Some basic ATM terminologies are described in this section to
facilitate defining the ATM managed objects.

3.1. VCL/VPL and VCC/VPC

There are two distinct types of ATM virtual connections: Virtual
Channel Connections (VCCs) and Virtual Path Connection (VPCs). As
shown in Figures 1 and 2, ATM virtual connections consist of
concatenated series of virtual links which forms a path between two
end points, with each concatenation occurring at an ATM switch.
Virtual links of VCCs are called Virtual Channel Links (VCLs).
Virtual links of VPCs are called Virtual Path Links (VPLs). The VCI
and VPI fields in the ATM cell header associate each cell of a VCC
with a particular VCL over a given physical link. The VPI field in
the ATM cell header associates each cell of a VPC with a particular
VPL over a given physical link. Switches route cells between VCLs
(or VPLs) via a cross-connect function according to the cells'
VCI/VPI (or VPI) values.

Tesink Standards Track [Page 3]

RFC 2515 ATM Management Objects February 1999

<-----------------------VCC-------------------------->
------------ -----------
|ATM | |ATM |
|X-Connect | |X-Connect |
VCL1 |Point | VCL2 |Point | VCL3
O---------|----X-----|-------|-----|----X-----|-------O
| | | |
------------ ------------
ATM Switch ATM Switch

Figure 1: Virtual Channel Links and
Virtual Channel Connection

<-----------------------VPC-------------------------->
------------ -----------
|ATM | |ATM |
|X-Connect | |X-Connect |
VPL1 |Point | VPL2 |Point | VPL3
O---------|----X-----|-------|-----|----X-----|-------O
| | | |
------------ ------------
ATM Switch ATM Switch

Figure 2: Virtual Path Links and
Virtual Path Connection

A single ATM end-system or switch does not support the whole end-to-
end span of a VCC (or VPC). Rather, multiple ATM end-systems and/or
switches each support one piece of the VCC (or VPC). That is, each
ATM end-system (or ATM switch) at one end of the VCC/VPC supports its
end of the VCC/VPC plus the VCL or VPL on its external interface, and
each switch through which the VCC/VPC passes supports the pair of
VCLs/VPLs on its external interfaces as well as the cross-connection
of those VCLs/VPLs. Thus, the end-to-end management of a VCC or VPC
is achieved only by appropriate management of its individual pieces
in combination.

Note that for management purposes, an ATM network may be viewed as a
large distributed switch by hiding all the network's internal
connectivity as being internal to the distributed switch (as shown in
Figure 2a). This model may for example be used for Customer Network
Management (CNM) purposes.

Tesink Standards Track [Page 4]

RFC 2515 ATM Management Objects February 1999

<---------------------VCC--------------------------->
--------------------------------------
| |
| ---------- ---------- |
| | ATM | | ATM | |
VCL1 | | Switch | | Switch | | VCL3
O-------|-|--------|------/-------|--------|-|------O
| | | | | |
| ---------- ---------- |
| |
| ATM Network |
--------------------------------------

Figure 2a: ATM Network modeled as a large distributed
switch

A VCC has a set of traffic characteristics (i.e., bandwidth
parameters, service category parameters, etc.). VCLs inherit their
traffic characteristics from the VCC of which they are a part. VCCs
are bi-directional by definition. However, the traffic parameters in
the two directions of a connection can be symmetric or asymmetric,
i.e., the two directions can have the same or different traffic
flows. A uni-directional traffic flow across a VCC is achieved by
assigning a zero bandwidth in one direction. Note that in addition
to the bandwidth required by the user traffic flow, bandwidth is also
required for OAM cell flows, even for the zero-bandwidth direction of
a uni-directional connection. These same principles apply to VPCs.

3.2. PVC, SVC and Soft PVC

A Permanent Virtual Connection (PVC) is a provisioned VCC or VPC. A
Switched Virtual Connection (SVC) is a switched VCC or VPC that is
set up in real-time via call set-up signaling procedures. A PVC (or
an SVC) can be a point-to-point, point-to-multipoint, or multipoint-
to-multipoint VCC or VPC. A Soft PVC is a connection of which
portions are switched, while other portions are permanent (see Figure
3 and [22]).

+--------+ +--------+ +--------+
pvc| ATM |svc svc | ATM |svc svc | ATM |pvc
----| Switch |-----------| Switch |-----------| Switch |----
+--------+ +--------+ +--------+

Figure 3: An example of a Soft PVC

Tesink Standards Track [Page 5]

RFC 2515 ATM Management Objects February 1999

3.3. Traffic Management Parameters

3.3.1. Traffic Policing and Traffic Shaping Parameters

In order to allocate resources fairly among different users, some
networks police traffic at resource access points. The traffic
enforcement or policing taken at a UNI is called Usage Parameter
Control (UPC) and is conceptually activated on an incoming VCL or VPL
as shown in Figure 4. The use of the traffic enforcer at the ingress
of the connection is to make sure that the user traffic does not
exceed the negotiated traffic parameters such as the peak cell rate
associated with a specific traffic descriptor type.

---------- ----------
UNI | ATM | NNI | ATM | UNI
| | switch | | | switch | |
O<---|---->X(UPC) |<----|------>| (UPC)X<-----|--->O
| VCL | | | VCL | | VCL |
---------- ----------

Figure 4: An Example of a UPC

In addition, traffic shaping may be performed on an outgoing VPL or
VCL at a given ATM interface. The function of the ATM traffic
shaper, conceptually either at the source or an egress point of the
connection, is to smooth the outgoing cell traffic inter-arrival
time. If policing or shaping is not performed then the policing or
shaping algorithm is not activated.

3.3.2. Cell Loss Priority

To prioritize traffic during resource congestion, ATM cells are
assigned one of the two types of Cell Loss Priority (CLP), CLP=0 and
CLP=1. ATM cells with CLP=0 have a higher priority in regard to cell
loss than ATM cells with CLP=1. Therefore, during resource
congestions, CLP=1 cells are dropped before any CLP=0 cell is
dropped.

3.3.3. QoS Class

RFC1695 specified that one of a number of Quality of Service (QoS)
classes is assigned to a VCC or VPC by associating the object
atmTrafficQoSClass with each VCL or VPL. However, new insights in
ATM traffic management have caused this object to be deprecated.

Tesink Standards Track [Page 6]

RFC 2515 ATM Management Objects February 1999

3.3.4. Service Category

Replacing QoS Class, VPLs and VCLs are qualified in terms of their
service category (atmServiceCategory). When properly configured, VCLs
(or VPLs) concatenated to form a VCC (or VPC) will all have the same
service category class as that of the VCC (or VPC).

3.4. Max Active and Max Current VPI and VCI Bits

A manager may wish to configure the maximum number of VPI and VCI
bits that can be used to identify VPIs and VCIs on a given ATM
interface. This value can be less than or equal to the maximum
number of bits supported by the interface hardware, and is referred
to in the MIB as the Max Active VPI Bits and Max Active VCI Bits.

However, a manager may not be able to configure the Max Active Bits
on both ends of an ATM link. For example, the manager may not be
allowed write access to the peer's MIB, or there may be hardware
limitations on the peer device. Therefore, the two ATM devices may
use ILMI to negotiate "Max Current" VPI and VCI bits, which is the
maximum number of bits that both interfaces are willing to support.
This is illustrated in Figure 5. The relationship between the
different parameters is illustrated in Figure 6. Note that if ILMI
negotiation is not supported, then the devices have no choice but to
use the configured Max Active bits, and assume that it has been
configured to the same value on both ends of the link.

+--------+ +--------+ +--------+
| ATM | IF a IF b | ATM | IF c IF d | ATM |
| Device |--------------| Device |--------------| Device |
+--------+ +--------+ +--------+

IF a: Max Active VPI Bits = 6 (configured)
Max Current VPI Bits = 6 (negotiated)

IF b: Max Active VPI Bits = 8 (configured)
Max Current VPI Bits = 6 (negotiated)

IF c: Max Active VPI Bits = 8 (configured)
Max Current VPI Bits = 8 (negotiated)

IF d: Max Active VPI Bits = 8 (configured)
Max Current VPI Bits = 8 (negotiated)

Tesink Standards Track [Page 7]

RFC 2515 ATM Management Objects February 1999

(between IF a and IF b, the minimum of the two configured
"Max Active VPI Bits" is 6, so both interfaces set their
"Max Current VPI Bits" to 6. Since IF c and IF d both
are configured with "Max Active VPI Bits" of 8, they
set their "Max Current VPI Bits" to 8.)

Figure 5

MSB LSB
+----------------------------------------------------+
| | | | |
+----------------------------------------------------+
^ ^ ^ ^
| | | |
Max bits Max Bits Max Max
supported supported Active (config.) current (negotiated)
by MIB by h/w Bits Bits

Figure 6

4. Overview

ATM management objects are used to manage ATM interfaces, ATM virtual
links, ATM cross-connects, AAL5 entities and AAL5 connections
supported by ATM hosts, ATM switches and ATM networks. This section
provides an overview and background of how to use this MIB and other
potential MIBs for this purpose.

The purpose of this memo is primarily to manage ATM PVCs. ATM SVCs
are also represented by the management information in this MIB.
However, full management of SVCs may require additional capabilities
which are beyond the scope of this memo.

4.1. Background

In addition to the MIB module defined in this memo, other MIB modules
are necessary to manage ATM interfaces, links and cross-connects.
Examples include MIB II for general system and interface management
[16][17], the DS3 or SONET MIBs for management of physical
interfaces, and, as appropriate, MIB modules for applications that
make use of ATM, such as SMDS. These MIB modules are outside the
scope of this specification.

The current specification of this ATM MIB is based on SNMPv2-SMI.

Tesink Standards Track [Page 8]

RFC 2515 ATM Management Objects February 1999

4.2. Structure of the MIB

The managed ATM objects are arranged into the following tables:

(1) ATM interface configuration table
(2) ATM interface DS3 PLCP and TC sublayer tables
(3) ATM traffic parameter table
(4) ATM interface virtual link (VPL/VCL) configuration
tables
(5) ATM VP/VC cross-connect tables
(6) AAL5 connection performance statistics table

Note that, managed objects for activation/deactivation of OAM cell
flows and ATM traps notifying virtual connection or virtual link
failures are outside the scope of this memo.

4.3. ATM Interface Configuration Table

This table contains information on ATM cell layer configuration of
local ATM interfaces on an ATM device in addition to the information
on such interfaces contained in the ifTable.

4.4. ATM Interface DS3 PLCP and TC Layer Tables

These tables provide performance statistics of the DS3 PLCP and TC
sublayer of local ATM interfaces on a managed ATM device. DS3 PLCP
and TC sublayer are currently used to carry ATM cells respectively
over DS3 and SONET transmission paths.

4.5. ATM Virtual Link and Cross-Connect Tables

ATM virtual link and cross-connect tables model bi-directional ATM
virtual links and ATM cross-connects. The ATM VP/VC link tables are
implemented in an ATM host, ATM switch and ATM network. The ATM
switch and ATM network also implement the ATM VP/VC cross-connect
tables. Both link and cross-connect tables are implemented in a
carrier's network for Customer Network Management (CNM) purposes.

The ATM virtual link tables are used to create, delete or modify ATM
virtual links in an ATM host, ATM switch and ATM network. ATM
virtual link tables along with the cross-connect tables are used to
create, delete or modify ATM cross-connects in an ATM switch or ATM
network (e.g., for CNM purposes).

For a PVC, the cross-connect between two VPLs is represented in the
atmVpCrossConnectTable of the ATM-MIB, indexed by the
atmVplCrossConnectIdentifier values for the two VPLs, and the cross-

Tesink Standards Track [Page 9]

RFC 2515 ATM Management Objects February 1999

rconnect between two VCLs is represented in the
atmVcCrossConnectTable of the ATM-MIB, indexed by the
atmVclCrossConnectIdentifier values for the two VCLs.

For an SVC or Soft PVC the VPL and VCL tables defined in this memo
are used. Hoewever, for an SVC or Soft PVC the cross-connect between
two VPLs is represented in the atmSvcVpCrossConnectTable of the
ATM2-MIB, indexed by the atmVplCrossConnectIdentifier values for the
two VPLs, and the cross-connect between two VCLs is represented in
the atmSvcVcCrossConnectTable of the ATM2-MIB, indexed by the
atmVclCrossConnectIdentifier values for the two VCLs.

Note: The ATM2-MIB module was being defined in a separate memo at the
time of this publication. Please consult the RFC directory for an
exact reference.

5. Application of MIB II to ATM

5.1. The System Group

For the purposes of the sysServices object in the System Group of MIB
II [16], ATM is a data link layer protocol. Thus, for ATM switches
and ATM networks, sysServices will have the value "2".

5.2. The Interface Group

The Interfaces Group of MIB II defines generic managed objects for
managing interfaces. This memo contains the media-specific
extensions to the Interfaces Group for managing ATM interfaces.

This memo assumes the interpretation of the Interfaces Group to be in
accordance with [17] which states that the interfaces table (ifTable)
contains information on the managed resource's interfaces and that
each sub-layer below the internetwork layer of a network interface is
considered an interface. Thus, the ATM cell layer interface is
represented as an entry in the ifTable. This entry is concerned with
the ATM cell layer as a whole, and not with individual virtual
connections which are managed via the ATM-specific managed objects
specified in this memo. The inter-relation of entries in the ifTable
is defined by Interfaces Stack Group defined in [17].

5.2.1. Support of the ATM Cell Layer by ifTable

Some specific interpretations of ifTable for the ATM cell layer
follow.

Tesink Standards Track [Page 10]

RFC 2515 ATM Management Objects February 1999

Object Use for the generic ATM layer
====== =============================

ifIndex Each ATM port is represented by an ifEntry.

ifDescr Description of the ATM interface.

ifType The value that is allocated for ATM is 37.

ifSpeed The total bandwidth in bits per second
for use by the ATM layer.

ifPhysAddress The interface's address at the ATM protocol
sublayer; the ATM address which would be used as the value
of the Called Party Address Information Element (IE) of a
signalling message for a connection which either:
- would terminate at this interface, or
- for which the Called Party Address IE
would need to be replaced by the Called Party SubAddress
IE before the message was forwarded to any other
interface.
For an interface on which signalling is not supported,
then the interface does not necessarily have an address,
but if it does, then ifPhysAddress is the address which
would be used as above in the event that signalling were
supported. If the interface has multiple such addresses,
then ifPhysAddress is its primary address. If the
interface has no addresses, then ifPhysAddress is an octet
string of zero length. Address encoding is as per [20].
Note that addresses assigned for purposes other than those
listed above (e.g., an address associated with the service
provider side of a public network UNI) may be represented
through atmInterfaceSubscrAddress.

ifAdminStatus See [17].

ifOperStatus Assumes the value down(2) if the ATM cell
layer is down.

ifLastChange See [17].

ifInOctets The number of received octets over the
interface, i.e., the number of received, assigned cells
multiplied by 53.

ifOutOctets The number of transmitted octets over the interface,
i.e., the number of transmitted, assigned cells multiplied
by 53.

Tesink Standards Track [Page 11]

RFC 2515 ATM Management Objects February 1999

ifInErrors The number of cells dropped due to uncorrectable HEC
errors.

ifInUnknownProtos The number of received cells discarded during cell
header validation, including cells with unrecognized
VPI/VCI values, and cells with invalid cell header
patterns. If cells with undefined PTI values are
discarded, they are also counted here.

ifOutErrors See [17].

ifName Textual name (unique on this system) of the
interface or an octet string of zero length.

ifLinkUpDownTrapEnable Default is disabled (2).

ifConnectorPresent Set to false (2).

ifHighSpeed See [17].

ifHCInOctets The 64-bit version of ifInOctets; supported
if required by the compliance statements in [17].

ifHCOutOctets The 64-bit version of ifOutOctets; supported
if required by the compliance statements in [17].

ifAlias The non-volatile 'alias' name for the interface
as specified by a network manager.

6. Support of the AAL3/4 Based Interfaces

For the management of AAL3/4 CPCS layer, see [18].

7. Support of the AAL5 Managed Objects

Support of AAL5 managed objects in an ATM switch and ATM host are
described below.

7.1. Managing AAL5 in a Switch

Managing AAL5 in a switch involves:

(1) performance management of an AAL5 entity as
an internal resource in a switch

(2) performance management of AAL5 per virtual connection

Tesink Standards Track [Page 12]

RFC 2515 ATM Management Objects February 1999

AAL5 in a switch is modeled as shown in Figure 7 and 8. AAL5 will be
managed in a switch for only those virtual connections that carry
AAL5 and are terminated at the AAL5 entity in the switch. Note that,
the virtual channels within the ATM UNIs carrying AAL5 will be
switched by the ATM switching fabric (termed as ATM Entity in the
figure) to the virtual channels on a proprietary internal interface
associated with the AAL5 process (termed as AAL5 Entity in the
figure). Therefore, performance management of the AAL5 resource in
the switch will be modeled using the ifTable through an internal
(pseudo-ATM) virtual interface and the AAL5 performance management
per virtual connection will be supported using an additional AAL5
connection table in the ATM MIB. The association between the AAL5
virtual link at the proprietary virtual, internal interface and the
ATM virtual link at the ATM interface will be derived from the
virtual channel cross-connect table and the virtual channel link
table in the ATM MIB. Note that for the proprietary virtual interface
the traffic transmit and receive conventions in the virtual channel
link table are as follows:

Transmitting traffic: ATM Entity ---> AAL5 Entity
Receiving traffic: ATM Entity <--- AAL5 Entity

___________________________
| |
| ============= |
| | AAL5 | |
| | Entity | |
| ============= |
| | |
| -----Prop. Virtual Interface
| | |
| ============= |
| | ATM | |
| | Entity | |
| ============= |
|_____|__|__|__|__|_______|
| | | | |
---------------- ATM UNIs
| | | | |
| | | | |
v v v v v

Figure 7: Model of an AAL5 Entity in a Switch

Tesink Standards Track [Page 13]

RFC 2515 ATM Management Objects February 1999

__________________
| |
| AAL5 |
|________________|
| |
| Prop. Virtual |
| Interface |
|________________|

Figure 8: AAL5 Entity's Interface Stack in a Switch

7.2. Managing AAL5 in a Host

Managing AAL5 in a host involves managing the AAL5 sublayer interface
as shown in Figure 9 and 10. The AAL5 sublayer is stacked directly
over the ATM sublayer. The ifTable is applied to the AAL5 sublayer
as defined in Section 10.3.

___________________________
| |
| ============= |
| | AAL5 | |
| | Entity | |
| ============= |
| | ATM | |
| | Entity | |
| ============= |
|___________|_____________|
|
__|__ ATM UNI
|
|
v

Figure 9: Model of an AAL5 Entity in a Host

__________________
| |
| AAL5 |
|________________|
| |
| ATM Layer |
|________________|
| |
| Physical Layer|
|________________|

Figure 10: AAL5 Entity's Interface Stack in a Host

Tesink Standards Track [Page 14]

RFC 2515 ATM Management Objects February 1999

7.3. Support of AAL5 by ifTable

The AAL5 entity in an ATM device (e.g., switch or host) is managed
using the ifTable. There are additional counters specified for AAL5
than those specified in the ATM B-ICI document [21]. Specific
interpretations of ifTable for the AAL5 CPCS layer are as follows.

Object Use for AAL5 CPCS layer entity
====== ==============================

ifIndex Each AAL5 entity is represented by an ifEntry.

ifDescr Description of the AAL5 entity.

ifType The value that is allocated for AAL5 is 49.

ifMtu Set to the largest PDU size for the
AAL5 CPCS layer that can be processed
by the AAL5 entity.

ifSpeed Set to 0.

ifPhysAddress An octet string of zero length.

ifAdminStatus See [17].

ifOperStatus Assumes the value down(2) if the AAL5
layer is down.

ifLastChange See [17].

ifInOctets The number of received AAL5 CPCS PDU octets.

ifOutOctets The number of AAL5 CPCS PDU octets
transmitted.

ifInUcastPkts The number of received AAL5 CPCS PDUs passed
to a higher-layer.

ifOutUcastPkts The number of AAL5 CPCS PDUs received from a
higher-layer for transmission.
[Note: The number of AAL5 PDUs actually
transmitted is the number received from a
higher-layer for transmission minus any which
are counted by ifOutErrors and ifOutDiscards.]

Tesink Standards Track [Page 15]

RFC 2515 ATM Management Objects February 1999

ifInErrors Number of errored AAL5 CPCS PDUs received.
The types of errors counted include CRC-32 errors,
SAR time-out errors, and oversized SDU errors.

ifInUnknownProtos Set to 0.

ifInDiscards Number of received AAL5 CPCS PDUs discarded.
Possible reason may be input buffer overflow.

ifOutErrors Number of AAL5 CPCS PDUs that could not
be transmitted due to errors.

ifOutDiscards Number of AAL5 CPCS PDUs received for
transmission that are discarded.
Possible reason may be output buffer
overflow.

ifInMulticastPkts Set to 0.

ifInBroadcastPkts Set to 0.

ifOutMulticastPkts Set to 0.

ifOutBroadcastPkts Set to 0.

ifName Textual name (unique on this system) of the
AAL5 entity or an octet string of zero length.

ifHighSpeed Set to 0.

ifConnectorPresent Set to false (2).

ifPromiscuousMode Set to false(2).

ifLinkUpDownTrapEnable Default is disabled (2).

ifAlias The non-volatile 'alias' name for the interface
as specified by a network manager.

7.4. Support of Proprietary Virtual Interface by ifTable

Specific interpretations of ifTable for the proprietary virtual,
internal interface associated with an AAL5 entity in an ATM switch
are as follows.

Tesink Standards Track [Page 16]

RFC 2515 ATM Management Objects February 1999

Object Use for proprietary virtual, internal interface
associated with AAL entities
====== ===============================================

ifIndex Each proprietary virtual, internal interface
associated with AAL entities is represented by an
ifEntry.

ifDescr Description of the proprietary virtual, internal
interface associated with AAL entities.

ifType The value that is allocated for proprietary
virtual, internal interface is 53.

ifSpeed See [17]. Set to 0 if the speed is not
known.

ifPhysAddress See [17]. An octet string of zero length
if no address is used for this interface.

ifAdminStatus See [17].

ifOperStatus See [17].

ifLastChange See [17].

ifName Textual name (unique on this system) of the
interface or an octet string of zero length.

ifHighSpeed See [17]. Set to 0 if the speed is not known.

ifConnectorPresent Set to false (2).

ifLinkUpDownTrapEnable Default is disabled (2).

ifAlias The non-volatile 'alias' name for the interface
as specified by a network manager.

7.5. AAL5 Connection Performance Statistics Table

An AAL5 connection table is used to provide AAL5 performance
information for each AAL5 virtual connection that is terminated at
the AAL5 entity contained within an ATM switch or host.

Tesink Standards Track [Page 17]

RFC 2515 ATM Management Objects February 1999

8. ILMI MIBs and the ATM Managed Objects

The ILMI MIBs are specified by the ATM Forum as a set of several
MIBs, all currently defined in the ILMI Specification [23]. The ILMI
protocols and MIBs allow two connected ATM Interface Management
Entities (IMEs) to exchange bi-directional parameters, mainly to
facilitate auto-configuration between ATM peer entities. The support
of the ATM management functions by the ILMI MIBs and those contained
in this memo are compared in Table 1. In this table, "yes" in the
"ILMI MIBs" column indicates that the management functions are
supported by the ILMI MIBs. The parenthesized numbers in the "This
memo" column correspond to the sets of tables enumerated in Section
6.2.

For that subset of management information which the ILMI MIBs and
this memo have in common, every effort has been made to retain
identical semantics and syntax, even though the MIB objects are
identified using different OBJECT IDENTIFIERs.

Table 1 - Structuring of ATM Managed Objects
______________________________________________________________
| |This |ILMI|
ATM Mgmt.Inf. |ATM Managed Objects |memo |MIBs|
______________|_________________________________|_______|____|

Local Interface Information:
_____________________________________________________________
ATM interface:| (1) port identifier |ATM MIB| |
physical layer| (2) physical transmission types | (1)*|yes |
configuration | (3) operational status |MIB II | * |
| (4) administrative status | | ** |
| (5) last change status | | |
_____________________________________________________________
ATM interface:| (1) active VPI/VCI fields |ATM MIB| |
cell layer | (2) maximum number of VPCs/VCCs | (1) |yes |
configuration | (3) configured VPCs/VCCs | | ** |
| (4) ILMI VPI/VCI values | | |
| (5) Neighbor system info | | |
| (6) Max. number of VPI/VCI bits | |yes |
| (7) ATM Subscribed Address | | |
_____________________________________________________________
ATM interface:|(1) received/transmitted cells | | |
cell layer |(2) cells with HEC error |MIB II |yes |
performance |(3) cell header validation errors| | |
_____________________________________________________________

Tesink Standards Track [Page 18]

RFC 2515 ATM Management Objects February 1999

_____________________________________________________________
ATM interface:|(1)DS3 PLCP severely errored |ATM MIB| |
PLCP & TC | framing seconds | (2)| |
layer |(2)DS3 PLCP unavailable seconds | |no |
performance |(3)DS3 PLCP alarm state | | |
|(4)out of cell delineation events| | |
|(5)TC alarm state | | |
_____________________________________________________________
VP/VC link: |(1)VPI or VPI/VCI value |ATM MIB| |
configuration |(2)VCL or VPL operational status | (3,4)|yes |
|(3)VCL/VPL administrative status | |*** |
|(4)VCL/VPL last change status | | |
|(5)transmit/receive traffic/ | | |
| service category parameters | | |
|(6)AAL type | | |
|(7)transmit/receive AAL5 SDU size| | |
|(8)AAL5 encapsulation type | | |
|(9)connection topology type | | |
|(10)use of call control | | |
_____________________________________________________________
VP/VC |(1)cross-connect identifier | | |
Cross-connect:|(2)port identifier of one | | |
configuration | end | | |
|(3)port identifier of the other |ATM MIB| |
| end | (5)|no |
|(4)VPI or VPI/VCI value | | |
| of one end | | |
|(5)VPI or VPI/VCI value of | | |
| the other end | | |
|(6)VC/VP cross-connect | | |
| operational status | | |
|(7)VC/VP cross-connect | | |
| administrative status | | |
|(8)VC/VP last change status | | |
_____________________________________________________________
VCC AAL5 CPCS |(1)PDUs discarded for CRC errors |ATM MIB| |
layer: |(2)PDUs discarded due to | (6) | |
performance | reassembly time out | |no |
|(3)PDUs discarded due to large | | |
| SDUs | | |
_____________________________________________________________
AAL5 entity: |(1)received/transmitted PDUs | | |
|(2)PDUs discarded due to | | |
| protocol errors |MIB II |no |
|(3)a set of configuration/state | | |
| parameters | | |
_____________________________________________________________

Tesink Standards Track [Page 19]

RFC 2515 ATM Management Objects February 1999

*The operational, administrative, and last change status of the ATM
interface and the physical transmission type shall be supported by
the interface table in MIB II [16][17]. ILMI does not contain the
administrative and last change status of the ATM interface.

** The ILMI MIB contains read-only objects for various parameters at
the ATM interface level.

***The ILMI MIBs contain local and end-to-end operational status of
the VPC/VCC segment. However, it does not contain the VPC/VCC
administrative and last change status and the VCC AAL information.

9. Definitions

ATM-MIB DEFINITIONS ::= BEGIN

IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
Counter32, Integer32, IpAddress, mib-2
FROM SNMPv2-SMI
DisplayString, RowStatus, TruthValue
FROM SNMPv2-TC
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
InterfaceIndex, ifIndex
FROM IF-MIB
AtmAddr, AtmConnKind, AtmConnCastType,
AtmServiceCategory, AtmTrafficDescrParamIndex,
AtmVpIdentifier, AtmVcIdentifier,
AtmVorXAdminStatus, AtmVorXLastChange,
AtmVorXOperStatus, atmNoClpNoScr
FROM ATM-TC-MIB;

atmMIB MODULE-IDENTITY
LAST-UPDATED "9810191200Z"
ORGANIZATION "IETF AToM MIB Working Group"
CONTACT-INFO
" Kaj Tesink
Postal: Bellcore
331 Newman Springs Road
Red Bank, NJ 07701
Tel: 732-758-5254
Fax: 732-758-2269
E-mail: [email protected]"
DESCRIPTION
"This is the MIB Module for ATM and AAL5-related
objects for managing ATM interfaces, ATM virtual

Tesink Standards Track [Page 20]

RFC 2515 ATM Management Objects February 1999

links, ATM cross-connects, AAL5 entities, and
and AAL5 connections."
REVISION "9810191200Z"
DESCRIPTION
"The initial revision of this module was published
as RFC 1695. Key revisions include:
o Textual Conventions and OBJECT IDENTITIES have
been moved to a separate MIB module.
o Applicability of objects to PVCs, SVCs and Soft
PVCs has been clarified.
o DEFVAL clauses have been added.
o The relationship of ifIndex values with different
layers and sublayers related to ATM has been
clarified.
o atmTrafficQosClass has been deprecated
and replaced with atmServiceCategory.
o atmInterfaceCurrentMaxVpiBits and
atmInterfaceCurrentMaxVciBits have been added with
a description on their relationship with other
objects.
o atmInterfaceAddressType and atmInterfaceAdminAddress
have been deprecated and replaced by
atmInterfaceSubscrAddress.
o atmInterfaceTCAlarmState has been clarified.
o atmTrafficDescrParamIndexNext has been introduced
in order to provide a manager a free
atmTrafficDescrParamIndex value.
o The atmTrafficFrameDiscard capability has been added.
o A connection topology type (atmVpl/VclCastType) and
a call control type (atmVpl/VclConnKind) have been
added.
o aal2 has been added to atmVccAalType."
REVISION "9406072245Z"
DESCRIPTION
"The RFC1695 version of this MIB module."
::= { mib-2 37 }

atmMIBObjects OBJECT IDENTIFIER ::= {atmMIB 1}

-- {atmMIBObjects 1} has been moved to a separate
-- specification [19].

-- This ATM MIB Module consists of the following tables:
-- (1) ATM Interface configuration table
-- (2) ATM Interface DS3 PLCP table
-- (3) ATM Interface TC Sublayer table

Tesink Standards Track [Page 21]

RFC 2515 ATM Management Objects February 1999

-- (4) Atm Traffic Descriptor table
-- (5) ATM Interface VPL configuration table
-- (6) ATM Interface VCL configuration table
-- (7) ATM VP Cross Connect table (for PVCs)
-- (8) ATM VC Cross Connect table (for PVCs)
-- (9) ATM Interface AAL5 VCC performance statistics
-- table

-- ATM Interface Configuration Parameters Table

-- This table contains ATM specific
-- configuration information associated with
-- an ATM interface beyond those
-- supported using the ifTable.

atmInterfaceConfTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmInterfaceConfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains ATM local interface
configuration parameters, one entry per ATM
interface port."
::= { atmMIBObjects 2 }

atmInterfaceConfEntry OBJECT-TYPE
SYNTAX AtmInterfaceConfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This list contains ATM interface configuration
parameters and state variables and is indexed
by ifIndex values of ATM interfaces."
INDEX { ifIndex }
::= { atmInterfaceConfTable 1}

AtmInterfaceConfEntry ::= SEQUENCE {
atmInterfaceMaxVpcs INTEGER,
atmInterfaceMaxVccs INTEGER,
atmInterfaceConfVpcs INTEGER,
atmInterfaceConfVccs INTEGER,
atmInterfaceMaxActiveVpiBits INTEGER,
atmInterfaceMaxActiveVciBits INTEGER,
atmInterfaceIlmiVpi AtmVpIdentifier,
atmInterfaceIlmiVci AtmVcIdentifier,

Tesink Standards Track [Page 22]

RFC 2515 ATM Management Objects February 1999

atmInterfaceAddressType INTEGER,
atmInterfaceAdminAddress AtmAddr,
atmInterfaceMyNeighborIpAddress IpAddress,
atmInterfaceMyNeighborIfName DisplayString,
atmInterfaceCurrentMaxVpiBits INTEGER,
atmInterfaceCurrentMaxVciBits INTEGER,
atmInterfaceSubscrAddress AtmAddr
}

atmInterfaceMaxVpcs OBJECT-TYPE
SYNTAX INTEGER (0..4096)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The maximum number of VPCs (PVPCs and SVPCs)
supported at this ATM interface. At the ATM UNI,
the maximum number of VPCs (PVPCs and SVPCs)
ranges from 0 to 256 only."
::= { atmInterfaceConfEntry 1}

atmInterfaceMaxVccs OBJECT-TYPE
SYNTAX INTEGER (0..65536)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The maximum number of VCCs (PVCCs and SVCCs)
supported at this ATM interface."
::= { atmInterfaceConfEntry 2}

atmInterfaceConfVpcs OBJECT-TYPE
SYNTAX INTEGER (0..4096)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of VPCs (PVPC, Soft PVPC and SVPC)
currently in use at this ATM interface. It includes
the number of PVPCs and Soft PVPCs that are configured
at the interface, plus the number of SVPCs
that are currently established at the
interface.

At the ATM UNI, the configured number of
VPCs (PVPCs and SVPCs) can range from
0 to 256 only."
::= { atmInterfaceConfEntry 3}

atmInterfaceConfVccs OBJECT-TYPE

Tesink Standards Track [Page 23]

RFC 2515 ATM Management Objects February 1999

SYNTAX INTEGER (0..65536)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of VCCs (PVCC, Soft PVCC and SVCC)
currently in use at this ATM interface. It includes
the number of PVCCs and Soft PVCCs that are configured
at the interface, plus the number of SVCCs
that are currently established at the
interface."
::= { atmInterfaceConfEntry 4}

atmInterfaceMaxActiveVpiBits OBJECT-TYPE
SYNTAX INTEGER (0..12)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The maximum number of active VPI bits
configured for use at the ATM interface.
At the ATM UNI, the maximum number of active
VPI bits configured for use ranges from
0 to 8 only."
::= { atmInterfaceConfEntry 5}

atmInterfaceMaxActiveVciBits OBJECT-TYPE
SYNTAX INTEGER (0..16)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The maximum number of active VCI bits
configured for use at this ATM interface."
::= { atmInterfaceConfEntry 6}

atmInterfaceIlmiVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The VPI value of the VCC supporting
the ILMI at this ATM interface. If the values of
atmInterfaceIlmiVpi and atmInterfaceIlmiVci are
both equal to zero then the ILMI is not
supported at this ATM interface."
DEFVAL { 0 }
::= { atmInterfaceConfEntry 7}

atmInterfaceIlmiVci OBJECT-TYPE
SYNTAX AtmVcIdentifier

Tesink Standards Track [Page 24]

RFC 2515 ATM Management Objects February 1999

MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The VCI value of the VCC supporting
the ILMI at this ATM interface. If the values of
atmInterfaceIlmiVpi and atmInterfaceIlmiVci are
both equal to zero then the ILMI is not
supported at this ATM interface."
DEFVAL { 16 }
::= { atmInterfaceConfEntry 8}

atmInterfaceAddressType OBJECT-TYPE
SYNTAX INTEGER {
private(1),
nsapE164(2),
nativeE164(3),
other(4)
}
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The type of primary ATM address configured
for use at this ATM interface."
::= { atmInterfaceConfEntry 9 }

-- The atmInterfaceAdminAddress object has been replaced by
-- atmInterfaceSubscrAddress.

atmInterfaceAdminAddress OBJECT-TYPE
SYNTAX AtmAddr
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The primary address assigned for administrative purposes,
for example, an address associated with the
service provider side of a public network UNI
(thus, the value of this address corresponds
with the value of ifPhysAddress at the host side).
If this interface has no assigned administrative
address, or when the address used for
administrative purposes is the same as that used
for ifPhysAddress, then this is an octet string of
zero length."
::= { atmInterfaceConfEntry 10 }

atmInterfaceMyNeighborIpAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-write

Tesink Standards Track [Page 25]

RFC 2515 ATM Management Objects February 1999

STATUS current
DESCRIPTION
"The IP address of the neighbor system connected to
the far end of this interface, to which a Network
Management Station can send SNMP messages, as IP
datagrams sent to UDP port 161, in order to access
network management information concerning the
operation of that system. Note that the value
of this object may be obtained in different ways,
e.g., by manual configuration, or through ILMI
interaction with the neighbor system."
::= { atmInterfaceConfEntry 11 }

atmInterfaceMyNeighborIfName OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The textual name of the interface on the neighbor
system on the far end of this interface, and to
which this interface connects. If the neighbor
system is manageable through SNMP and supports
the object ifName, the value of this object must
be identical with that of ifName for the ifEntry
of the lowest level physical interface
for this port. If this interface does not have a
textual name, the value of this object is a zero
length string. Note that the value of this object
may be obtained in different ways, e.g., by manual
configuration, or through ILMI interaction with
the neighbor system."
::= { atmInterfaceConfEntry 12 }

atmInterfaceCurrentMaxVpiBits OBJECT-TYPE
SYNTAX INTEGER (0..12)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum number of VPI Bits that may
currently be used at this ATM interface.
The value is the minimum of
atmInterfaceMaxActiveVpiBits, and the
atmInterfaceMaxActiveVpiBits of the interface's
UNI/NNI peer.

If the interface does not negotiate with
its peer to determine the number of VPI Bits
that can be used on the interface, then the

Tesink Standards Track [Page 26]

RFC 2515 ATM Management Objects February 1999

value of this object must equal
atmInterfaceMaxActiveVpiBits."
::= { atmInterfaceConfEntry 13 }

atmInterfaceCurrentMaxVciBits OBJECT-TYPE
SYNTAX INTEGER (0..16)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum number of VCI Bits that may
currently be used at this ATM interface.
The value is the minimum of
atmInterfaceMaxActiveVciBits, and the
atmInterfaceMaxActiveVciBits of the interface's
UNI/NNI peer.

If the interface does not negotiate with
its peer to determine the number of VCI Bits
that can be used on the interface, then the
value of this object must equal
atmInterfaceMaxActiveVciBits."
::= { atmInterfaceConfEntry 14 }

atmInterfaceSubscrAddress OBJECT-TYPE
SYNTAX AtmAddr
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The identifier assigned by a service provider
to the network side of a public network UNI.
If this interface has no assigned service provider
address, or for other interfaces this is an octet string
of zero length."
::= { atmInterfaceConfEntry 15 }

-- The ATM Interface DS3 PLCP Table

-- This table contains the DS3 PLCP configuration and
-- state parameters of those ATM interfaces
-- which use DS3 PLCP for carrying ATM cells over DS3.

atmInterfaceDs3PlcpTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmInterfaceDs3PlcpEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains ATM interface DS3 PLCP
parameters and state variables, one entry per

Tesink Standards Track [Page 27]

RFC 2515 ATM Management Objects February 1999

ATM interface port."
::= { atmMIBObjects 3}

atmInterfaceDs3PlcpEntry OBJECT-TYPE
SYNTAX AtmInterfaceDs3PlcpEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This list contains DS3 PLCP parameters and
state variables at the ATM interface and is
indexed by the ifIndex value of the ATM interface."
INDEX { ifIndex }
::= { atmInterfaceDs3PlcpTable 1}

AtmInterfaceDs3PlcpEntry ::= SEQUENCE {
atmInterfaceDs3PlcpSEFSs Counter32,
atmInterfaceDs3PlcpAlarmState INTEGER,
atmInterfaceDs3PlcpUASs Counter32
}

atmInterfaceDs3PlcpSEFSs OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DS3 PLCP Severely Errored Framing
Seconds (SEFS). Each SEFS represents a
one-second interval which contains
one or more SEF events."
::= { atmInterfaceDs3PlcpEntry 1}

atmInterfaceDs3PlcpAlarmState OBJECT-TYPE
SYNTAX INTEGER {
noAlarm(1),
receivedFarEndAlarm(2),
incomingLOF(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is an
alarm present for the DS3 PLCP. The value
receivedFarEndAlarm means that the DS3 PLCP
has received an incoming Yellow
Signal, the value incomingLOF means that
the DS3 PLCP has declared a loss of frame (LOF)
failure condition, and the value noAlarm

Tesink Standards Track [Page 28]

RFC 2515 ATM Management Objects February 1999

means that there are no alarms present.
Transition from the failure to the no alarm state
occurs when no defects (e.g., LOF) are received
for more than 10 seconds."
::= { atmInterfaceDs3PlcpEntry 2}

atmInterfaceDs3PlcpUASs OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds encountered by the PLCP."
::= { atmInterfaceDs3PlcpEntry 3}

-- The ATM Interface TC Sublayer Table

-- This table contains TC sublayer configuration and
-- state parameters of those ATM interfaces
-- which use TC sublayer for carrying ATM cells over
-- SONET/SDH or DS3.

atmInterfaceTCTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmInterfaceTCEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains ATM interface TC
Sublayer parameters and state variables,
one entry per ATM interface port."
::= { atmMIBObjects 4}

atmInterfaceTCEntry OBJECT-TYPE
SYNTAX AtmInterfaceTCEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This list contains TC Sublayer parameters
and state variables at the ATM interface and is
indexed by the ifIndex value of the ATM interface."
INDEX {ifIndex }
::= { atmInterfaceTCTable 1}

AtmInterfaceTCEntry ::= SEQUENCE {
atmInterfaceOCDEvents Counter32,
atmInterfaceTCAlarmState INTEGER

Tesink Standards Track [Page 29]

RFC 2515 ATM Management Objects February 1999

}

atmInterfaceOCDEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times the Out of Cell
Delineation (OCD) events occur. If seven
consecutive ATM cells have Header Error
Control (HEC) violations, an OCD event occurs.
A high number of OCD events may indicate a
problem with the TC Sublayer."
::= { atmInterfaceTCEntry 1}

atmInterfaceTCAlarmState OBJECT-TYPE
SYNTAX INTEGER {
noAlarm(1),
lcdFailure(2)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is an
alarm present for the TC Sublayer. The value
lcdFailure(2) indicates that the TC Sublayer
is currently in the Loss of Cell Delineation
(LCD) defect maintenance state. The value
noAlarm(1) indicates that the TC Sublayer
is currently not in the LCD defect
maintenance state."
::= { atmInterfaceTCEntry 2}

-- ATM Traffic Descriptor Parameter Table

-- This table contains a set of self-consistent
-- ATM traffic parameters including the
-- ATM traffic service category.

-- The ATM virtual link tables (i.e., VPL and VCL tables)
-- will use this ATM Traffic Descriptor table
-- to assign traffic parameters and service category
-- to the receive and transmit directions of
-- the ATM virtual links (i.e., VPLs and VCLs).
-- The ATM VPL or VCL table will indicate a row
-- in the atmTrafficDescrParamTable
-- using its atmTrafficDescrParamIndex value.

Tesink Standards Track [Page 30]

RFC 2515 ATM Management Objects February 1999

-- The management application can then compare a set of
-- ATM traffic parameters with a single value.

-- If no suitable row(s) in the atmTrafficDescrParamTable
-- exists, the manager must create a new row(s) in this
-- table. If such a row is created, agent checks the
-- sanity of that set of ATM traffic parameter values.

-- The manager may use atmTrafficDescrParamIndexNext
-- in order to obtain a free atmTrafficDescrParamIndex
-- value.

-- When creating a new row, the parameter values
-- will be checked for self-consistency.
-- Predefined/template rows may be supported.

-- A row in the atmTrafficDescrParamTable is deleted
-- by setting the atmTrafficDescrRowStatus to destroy(6).
-- The agent will check whether this row is still in use
-- by any entry of the atmVplTable or atmVclTable.
-- The agent denies the request if the row is still in
-- use.

-- The ATM Traffic Descriptor Parameter Table

atmTrafficDescrParamTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmTrafficDescrParamEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains information on ATM traffic
descriptor type and the associated parameters."
::= { atmMIBObjects 5}

atmTrafficDescrParamEntry OBJECT-TYPE
SYNTAX AtmTrafficDescrParamEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This list contains ATM traffic descriptor
type and the associated parameters."
INDEX {atmTrafficDescrParamIndex}
::= { atmTrafficDescrParamTable 1}

AtmTrafficDescrParamEntry ::= SEQUENCE {
atmTrafficDescrParamIndex AtmTrafficDescrParamIndex,
atmTrafficDescrType OBJECT IDENTIFIER,

Tesink Standards Track [Page 31]

RFC 2515 ATM Management Objects February 1999

atmTrafficDescrParam1 Integer32,
atmTrafficDescrParam2 Integer32,
atmTrafficDescrParam3 Integer32,
atmTrafficDescrParam4 Integer32,
atmTrafficDescrParam5 Integer32,
atmTrafficQoSClass INTEGER,
atmTrafficDescrRowStatus RowStatus,
atmServiceCategory AtmServiceCategory,
atmTrafficFrameDiscard TruthValue
}

atmTrafficDescrParamIndex OBJECT-TYPE
SYNTAX AtmTrafficDescrParamIndex (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object is used by the virtual link
table (i.e., VPL or VCL table)
to identify the row of this table.
When creating a new row in the table
the value of this index may be obtained
by retrieving the value of
atmTrafficDescrParamIndexNext."
::= { atmTrafficDescrParamEntry 1}

atmTrafficDescrType OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The value of this object identifies the type
of ATM traffic descriptor.
The type may indicate no traffic descriptor or
traffic descriptor with one or more parameters.
These parameters are specified as a parameter
vector, in the corresponding instances of the
objects:
atmTrafficDescrParam1
atmTrafficDescrParam2
atmTrafficDescrParam3
atmTrafficDescrParam4
atmTrafficDescrParam5."
DEFVAL { atmNoClpNoScr }
::= { atmTrafficDescrParamEntry 2}

atmTrafficDescrParam1 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create

Tesink Standards Track [Page 32]

RFC 2515 ATM Management Objects February 1999

STATUS current
DESCRIPTION
"The first parameter of the ATM traffic descriptor
used according to the value of
atmTrafficDescrType."
DEFVAL { 0 }
::= { atmTrafficDescrParamEntry 3}

atmTrafficDescrParam2 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The second parameter of the ATM traffic descriptor
used according to the value of
atmTrafficDescrType."
DEFVAL { 0 }
::= { atmTrafficDescrParamEntry 4}

atmTrafficDescrParam3 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The third parameter of the ATM traffic descriptor
used according to the value of
atmTrafficDescrType."
DEFVAL { 0 }
::= { atmTrafficDescrParamEntry 5}

atmTrafficDescrParam4 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The fourth parameter of the ATM traffic descriptor
used according to the value of
atmTrafficDescrType."
DEFVAL { 0 }
::= { atmTrafficDescrParamEntry 6}

atmTrafficDescrParam5 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The fifth parameter of the ATM traffic descriptor
used according to the value of

Tesink Standards Track [Page 33]

RFC 2515 ATM Management Objects February 1999

atmTrafficDescrType."
DEFVAL { 0 }
::= { atmTrafficDescrParamEntry 7}

atmTrafficQoSClass OBJECT-TYPE
SYNTAX INTEGER (0..255)
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"The value of this object identifies the QoS Class.
Four Service classes have been
specified in the ATM Forum UNI Specification:
Service Class A: Constant bit rate video and
Circuit emulation
Service Class B: Variable bit rate video/audio
Service Class C: Connection-oriented data
Service Class D: Connectionless data
Four QoS classes numbered 1, 2, 3, and 4 have
been specified with the aim to support service
classes A, B, C, and D respectively.
An unspecified QoS Class numbered `0' is used
for best effort traffic."
DEFVAL { 0 }
::= { atmTrafficDescrParamEntry 8}

atmTrafficDescrRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to create
a new row or modify or delete an
existing row in this table."
DEFVAL { active }
::= {atmTrafficDescrParamEntry 9}

atmServiceCategory OBJECT-TYPE
SYNTAX AtmServiceCategory
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The ATM service category."
DEFVAL { ubr }
::= { atmTrafficDescrParamEntry 10}

atmTrafficFrameDiscard OBJECT-TYPE
SYNTAX TruthValue

Tesink Standards Track [Page 34]

RFC 2515 ATM Management Objects February 1999

MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If set to 'true', this object indicates that the network
is requested to treat data for this connection, in the
given direction, as frames (e.g. AAL5 CPCS_PDU's) rather
than as individual cells. While the precise
implementation is network-specific, this treatment may
for example involve discarding entire frames during
congestion, rather than a few cells from many frames."
DEFVAL { true }
::= { atmTrafficDescrParamEntry 11 }

-- ATM Interface Virtual Path Link (VPL) Table

-- This table contains configuration and state
-- information of a bi-directional Virtual Path Link
-- (VPL)

-- This table can be used to create, delete or modify
-- a VPL that is terminated in an ATM host or switch.
-- This table can also be used to create, delete or
-- modify a VPL which is cross-connected to another
-- VPL.

-- In the example below, the traffic flows on the receive
-- and transmit directions of the VPLs are characterized
-- by atmVplReceiveTrafficDescrIndex and
-- atmVplTransmitTrafficDescrIndex respectively.
-- The cross-connected VPLs are identified by
-- atmVplCrossConnectIdentifier.

-- ________________________________
-- | |
-- VPL | ATM Host, Switch, or Network | VPL
-- receive | | receive
-- ========> X X <=======
-- <======== X X ========>
-- transmit | | transmit
-- |______________________________|

-- The ATM Interface VPL Table

Tesink Standards Track [Page 35]

RFC 2515 ATM Management Objects February 1999

atmVplTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmVplEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The Virtual Path Link (VPL) table. A
bi-directional VPL is modeled as one entry
in this table. This table can be used for
PVCs, SVCs and Soft PVCs.
Entries are not present in this table for
the VPIs used by entries in the atmVclTable."
::= { atmMIBObjects 6}

atmVplEntry OBJECT-TYPE
SYNTAX AtmVplEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the VPL table. This entry is
used to model a bi-directional VPL.
To create a VPL at an ATM interface,
either of the following procedures are used:

Negotiated VPL establishment

(1) The management application creates
a VPL entry in the atmVplTable
by setting atmVplRowStatus to createAndWait(5).
This may fail for the following reasons:
- The selected VPI value is unavailable,
- The selected VPI value is in use.
Otherwise, the agent creates a row and
reserves the VPI value on that port.

(2) The manager selects an existing row(s) in the
atmTrafficDescrParamTable,
thereby, selecting a set of self-consistent
ATM traffic parameters and the service category
for receive and transmit directions of the VPL.

(2a) If no suitable row(s) in the
atmTrafficDescrParamTable exists,
the manager must create a new row(s)
in that table.

(2b) The manager characterizes the VPL's traffic
parameters through setting the
atmVplReceiveTrafficDescrIndex and the

Tesink Standards Track [Page 36]

RFC 2515 ATM Management Objects February 1999

atmVplTransmitTrafficDescrIndex values
in the VPL table, which point to the rows
containing desired ATM traffic parameter values
in the atmTrafficDescrParamTable. The agent
will check the availability of resources and
may refuse the request.
If the transmit and receive service categories
are inconsistent, the agent should refuse the
request.

(3) The manager activates the VPL by setting the
the atmVplRowStatus to active(1).
If this set is successful, the agent has
reserved the resources to satisfy the requested
traffic parameter values and the service category
for that VPL.

(4) If the VPL terminates a VPC in the ATM host
or switch, the manager turns on the
atmVplAdminStatus to up(1) to turn the VPL
traffic flow on. Otherwise, the
atmVpCrossConnectTable must be used
to cross-connect the VPL to another VPL(s)
in an ATM switch or network.

One-Shot VPL Establishment

A VPL may also be established in one step by a
set-request with all necessary VPL parameter
values and atmVplRowStatus set to createAndGo(4).

In contrast to the negotiated VPL establishment
which allows for detailed error checking
(i.e., set errors are explicitly linked to
particular resource acquisition failures),
the one-shot VPL establishment
performs the setup on one operation but
does not have the advantage of step-wise
error checking.

VPL Retirement

A VPL is released by setting atmVplRowStatus to
destroy(6), and the agent may release all
associated resources."
INDEX {ifIndex, atmVplVpi }
::= { atmVplTable 1}

Tesink Standards Track [Page 37]

RFC 2515 ATM Management Objects February 1999

AtmVplEntry ::= SEQUENCE {
atmVplVpi AtmVpIdentifier,
atmVplAdminStatus AtmVorXAdminStatus,
atmVplOperStatus AtmVorXOperStatus,
atmVplLastChange AtmVorXLastChange,
atmVplReceiveTrafficDescrIndex
AtmTrafficDescrParamIndex,
atmVplTransmitTrafficDescrIndex
AtmTrafficDescrParamIndex,
atmVplCrossConnectIdentifier INTEGER,
atmVplRowStatus RowStatus,
atmVplCastType AtmConnCastType,
atmVplConnKind AtmConnKind
}

atmVplVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI value of the VPL."
::= { atmVplEntry 1}

atmVplAdminStatus OBJECT-TYPE
SYNTAX AtmVorXAdminStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is instanciated only for a VPL
which terminates a VPC (i.e., one which is
NOT cross-connected to other VPLs).
Its value specifies the desired
administrative state of the VPL."
DEFVAL { down }
::= { atmVplEntry 2}

atmVplOperStatus OBJECT-TYPE
SYNTAX AtmVorXOperStatus
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current operational status of the VPL."
::= { atmVplEntry 3}

atmVplLastChange OBJECT-TYPE
SYNTAX AtmVorXLastChange
MAX-ACCESS read-only

Tesink Standards Track [Page 38]

RFC 2515 ATM Management Objects February 1999

STATUS current
DESCRIPTION
"The value of sysUpTime at the time this
VPL entered its current operational state."
::= { atmVplEntry 4 }

atmVplReceiveTrafficDescrIndex OBJECT-TYPE
SYNTAX AtmTrafficDescrParamIndex
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The value of this object identifies the row
in the atmTrafficDescrParamTable which
applies to the receive direction of the VPL."
DEFVAL { 0 }
::= { atmVplEntry 5}

atmVplTransmitTrafficDescrIndex OBJECT-TYPE
SYNTAX AtmTrafficDescrParamIndex
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The value of this object identifies the row
in the atmTrafficDescrParamTable which
applies to the transmit direction of the VPL."
DEFVAL { 0 }
::= { atmVplEntry 6}

atmVplCrossConnectIdentifier OBJECT-TYPE
SYNTAX INTEGER (0..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is instantiated only for a VPL
which is cross-connected to other VPLs
that belong to the same VPC. All such
associated VPLs have the same value of this
object, and all their cross-connections are
identified either by entries that are indexed
by the same value of atmVpCrossConnectIndex in
the atmVpCrossConnectTable of this MIB module or by
the same value of the cross-connect index in
the cross-connect table for SVCs and Soft PVCs
(defined in a separate MIB module).
At no time should entries in these respective
cross-connect tables exist simultaneously
with the same cross-connect index value.

Tesink Standards Track [Page 39]

RFC 2515 ATM Management Objects February 1999

The value of this object is initialized by the
agent after the associated entries in the
atmVpCrossConnectTable have been created."
::= {atmVplEntry 7}

atmVplRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to create, delete
or modify a row in this table.
To create a new VCL, this object is
initially set to 'createAndWait' or
'createAndGo'. This object should not be
set to 'active' unless the following columnar
objects have been set to their desired value
in this row:
atmVplReceiveTrafficDescrIndex and
atmVplTransmitTrafficDescrIndex.
The DESCRIPTION of atmVplEntry provides
further guidance to row treatment in this table."
DEFVAL { createAndWait }
::= {atmVplEntry 8}

atmVplCastType OBJECT-TYPE
SYNTAX AtmConnCastType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The connection topology type."
DEFVAL { p2p }
::= {atmVplEntry 9}

atmVplConnKind OBJECT-TYPE
SYNTAX AtmConnKind
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The use of call control."
DEFVAL { pvc }
::= {atmVplEntry 10}

-- ATM Interface Virtual Channel Link (VCL) Table

-- This table contains configuration and state
-- information of a bi-directional Virtual Channel
-- Link (VCL) at an ATM interface.

Tesink Standards Track [Page 40]

RFC 2515 ATM Management Objects February 1999

-- This table can be used to create, delete or modify
-- a VCL that is terminated in an ATM host or switch.
-- This table can also be
-- used to create, delete or modify a VCL that is
-- cross-connected to another VCL.

-- The ATM Interface VCL Table

atmVclTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmVclEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The Virtual Channel Link (VCL) table. A
bi-directional VCL is modeled as one entry
in this table. This table can be used for
PVCs, SVCs and Soft PVCs."
::= { atmMIBObjects 7}

atmVclEntry OBJECT-TYPE
SYNTAX AtmVclEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the VCL table. This entry is
used to model a bi-directional VCL.
To create a VCL at an ATM interface,
either of the following procedures are used:

Negotiated VCL establishment

(1) The management application creates
a VCL entry in the atmVclTable
by setting atmVclRowStatus to createAndWait(5).
This may fail for the following reasons:
- The selected VPI/VCI values are unavailable,
- The selected VPI/VCI values are in use.
Otherwise, the agent creates a row and
reserves the VPI/VCI values on that port.

(2) The manager selects an existing row(s) in the
atmTrafficDescrParamTable,
thereby, selecting a set of self-consistent
ATM traffic parameters and the service category
for receive and transmit directions of the VCL.

Tesink Standards Track [Page 41]

RFC 2515 ATM Management Objects February 1999

(2a) If no suitable row(s) in the
atmTrafficDescrParamTable exists,
the manager must create a new row(s)
in that table.

(2b) The manager characterizes the VCL's traffic
parameters through setting the
atmVclReceiveTrafficDescrIndex and the
atmVclTransmitTrafficDescrIndex values
in the VCL table, which point to the rows
containing desired ATM traffic parameter values
in the atmTrafficDescrParamTable. The agent
will check the availability of resources and
may refuse the request.
If the transmit and receive service categories
are inconsistent, the agent should refuse the
request.

(3) The manager activates the VCL by setting the
the atmVclRowStatus to active(1) (for
requirements on this activation see the
description of atmVclRowStatus).
If this set is successful, the agent has
reserved the resources to satisfy the requested
traffic parameter values and the service category
for that VCL.
(4) If the VCL terminates a VCC in the ATM host
or switch, the manager turns on the
atmVclAdminStatus to up(1) to turn the VCL
traffic flow on. Otherwise, the
atmVcCrossConnectTable must be used
to cross-connect the VCL to another VCL(s)
in an ATM switch or network.

One-Shot VCL Establishment

A VCL may also be established in one step by a
set-request with all necessary VCL parameter
values and atmVclRowStatus set to createAndGo(4).

In contrast to the negotiated VCL establishment
which allows for detailed error checking
(i.e., set errors are explicitly linked to
particular resource acquisition failures),
the one-shot VCL establishment
performs the setup on one operation but
does not have the advantage of step-wise
error checking.

Tesink Standards Track [Page 42]

RFC 2515 ATM Management Objects February 1999

VCL Retirement

A VCL is released by setting atmVclRowStatus to
destroy(6), and the agent may release all
associated resources."
INDEX {ifIndex, atmVclVpi, atmVclVci }
::= { atmVclTable 1}

AtmVclEntry ::= SEQUENCE {
atmVclVpi AtmVpIdentifier,
atmVclVci AtmVcIdentifier,
atmVclAdminStatus AtmVorXAdminStatus,
atmVclOperStatus AtmVorXOperStatus,
atmVclLastChange AtmVorXLastChange,
atmVclReceiveTrafficDescrIndex
AtmTrafficDescrParamIndex,
atmVclTransmitTrafficDescrIndex
AtmTrafficDescrParamIndex,
atmVccAalType INTEGER,
atmVccAal5CpcsTransmitSduSize INTEGER,
atmVccAal5CpcsReceiveSduSize INTEGER,
atmVccAal5EncapsType INTEGER,
atmVclCrossConnectIdentifier INTEGER,
atmVclRowStatus RowStatus,
atmVclCastType AtmConnCastType,
atmVclConnKind AtmConnKind
}

atmVclVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI value of the VCL."
::= { atmVclEntry 1}

atmVclVci OBJECT-TYPE
SYNTAX AtmVcIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VCI value of the VCL."
::= { atmVclEntry 2}

atmVclAdminStatus OBJECT-TYPE
SYNTAX AtmVorXAdminStatus
MAX-ACCESS read-create
STATUS current

Tesink Standards Track [Page 43]

RFC 2515 ATM Management Objects February 1999

DESCRIPTION
"This object is instanciated only for a VCL which
terminates a VCC (i.e., one which is NOT
cross-connected to other VCLs). Its value
specifies the desired administrative state of
the VCL."
DEFVAL { down }
::= { atmVclEntry 3}

atmVclOperStatus OBJECT-TYPE
SYNTAX AtmVorXOperStatus
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current operational status of the VCL."
::= { atmVclEntry 4}

atmVclLastChange OBJECT-TYPE
SYNTAX AtmVorXLastChange
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time this VCL
entered its current operational state."
::= { atmVclEntry 5 }

atmVclReceiveTrafficDescrIndex OBJECT-TYPE
SYNTAX AtmTrafficDescrParamIndex
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The value of this object identifies the row
in the ATM Traffic Descriptor Table which
applies to the receive direction of this VCL."
DEFVAL { 0 }
::= { atmVclEntry 6}

atmVclTransmitTrafficDescrIndex OBJECT-TYPE
SYNTAX AtmTrafficDescrParamIndex
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The value of this object identifies the row
of the ATM Traffic Descriptor Table which applies
to the transmit direction of this VCL."
DEFVAL { 0 }
::= { atmVclEntry 7}

Tesink Standards Track [Page 44]

RFC 2515 ATM Management Objects February 1999

atmVccAalType OBJECT-TYPE
SYNTAX INTEGER {
aal1(1),
aal34(2),
aal5(3),
other(4),
unknown(5),
aal2(6)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An instance of this object only exists when the
local VCL end-point is also the VCC end-point,
and AAL is in use.
The type of AAL used on this VCC.
The AAL type includes AAL1, AAL2, AAL3/4,
and AAL5. The other(4) may be user-defined
AAL type. The unknown type indicates that
the AAL type cannot be determined."
DEFVAL { aal5 }
::= { atmVclEntry 8 }

atmVccAal5CpcsTransmitSduSize OBJECT-TYPE
SYNTAX INTEGER (1..65535)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An instance of this object only exists when the
local VCL end-point is also the VCC end-point,
and AAL5 is in use.
The maximum AAL5 CPCS SDU size in octets that is
supported on the transmit direction of this VCC."
DEFVAL { 9188 }
::= { atmVclEntry 9 }

atmVccAal5CpcsReceiveSduSize OBJECT-TYPE
SYNTAX INTEGER (1..65535)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An instance of this object only exists when the
local VCL end-point is also the VCC end-point,
and AAL5 is in use.
The maximum AAL5 CPCS SDU size in octets that is
supported on the receive direction of this VCC."
DEFVAL { 9188 }
::= { atmVclEntry 10 }

Tesink Standards Track [Page 45]

RFC 2515 ATM Management Objects February 1999

atmVccAal5EncapsType OBJECT-TYPE
SYNTAX INTEGER {
vcMultiplexRoutedProtocol(1),
vcMultiplexBridgedProtocol8023(2),
vcMultiplexBridgedProtocol8025(3),
vcMultiplexBridgedProtocol8026(4),
vcMultiplexLANemulation8023(5),
vcMultiplexLANemulation8025(6),
llcEncapsulation(7),
multiprotocolFrameRelaySscs(8),
other(9),
unknown(10)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An instance of this object only exists when the
local VCL end-point is also the VCC end-point,
and AAL5 is in use.
The type of data encapsulation used over
the AAL5 SSCS layer. The definitions reference
RFC 1483 Multiprotocol Encapsulation
over ATM AAL5 and to the ATM Forum
LAN Emulation specification."
DEFVAL { llcEncapsulation }
::= { atmVclEntry 11 }

atmVclCrossConnectIdentifier OBJECT-TYPE
SYNTAX INTEGER (0..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is instantiated only for a VCL
which is cross-connected to other VCLs
that belong to the same VCC. All such
associated VCLs have the same value of this
object, and all their cross-connections are
identified either by entries that are indexed
by the same value of atmVcCrossConnectIndex in
the atmVcCrossConnectTable of this MIB module or by
the same value of the cross-connect index in
the cross-connect table for SVCs and Soft PVCs
(defined in a separate MIB module).

At no time should entries in these respective
cross-connect tables exist simultaneously
with the same cross-connect index value.

Tesink Standards Track [Page 46]

RFC 2515 ATM Management Objects February 1999

The value of this object is initialized by the
agent after the associated entries in the
atmVcCrossConnectTable have been created."
::= {atmVclEntry 12}

atmVclRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to create, delete or
modify a row in this table. To create
a new VCL, this object is initially set
to 'createAndWait' or 'createAndGo'.
This object should not be
set to 'active' unless the following columnar
objects have been set to their desired value
in this row:
atmVclReceiveTrafficDescrIndex,
atmVclTransmitTrafficDescrIndex.
In addition, if the local VCL end-point
is also the VCC end-point:
atmVccAalType.
In addition, for AAL5 connections only:
atmVccAal5CpcsTransmitSduSize,
atmVccAal5CpcsReceiveSduSize, and
atmVccAal5EncapsType. (The existence
of these objects imply the AAL connection type.).
The DESCRIPTION of atmVclEntry provides
further guidance to row treatment in this table."
DEFVAL { createAndWait }
::= {atmVclEntry 13}

atmVclCastType OBJECT-TYPE
SYNTAX AtmConnCastType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The connection topology type."
DEFVAL { p2p }
::= {atmVclEntry 14}

atmVclConnKind OBJECT-TYPE
SYNTAX AtmConnKind
MAX-ACCESS read-create
STATUS current
DESCRIPTION

Tesink Standards Track [Page 47]

RFC 2515 ATM Management Objects February 1999

"The use of call control."
DEFVAL { pvc }
::= {atmVclEntry 15}

-- ATM Virtual Path (VP) Cross Connect Table

-- This table contains configuration and state
-- information of point-to-point,
-- point-to-multipoint, or multipoint-to-multipoint
-- VP cross-connects for PVCs.

-- This table has read-create access and can be used
-- to cross-connect the VPLs together in an ATM switch
-- or network. The atmVpCrossConnectIndex
-- is used to associate the related
-- VPLs that are cross-connected together.

-- The ATM VP Cross Connect Table
-- models each bi-directional VPC
-- cross-connect as a set of entries in
-- the atmVpCrossConnectTable. A
-- point-to-point VPC cross-connect is modeled
-- as one entry; a point-to-multipoint (N leafs) VPC
-- cross-connect as N entries in this table; and
-- a multipoint-to-multipoint (N parties) VPC cross-
-- connect as N(N-1)/2 entries in this table.
-- In the latter cases, all the N (or N(N-1)/2) entries
-- are associated with a single VPC cross-connect by
-- having the same value of atmVpCrossConnectIndex.

-- _________________________________________
-- | |
-- Low | ATM Switch or Network | High
-- port| | port
-- _____|>> from low to high VPC traffic flow >>|______
-- |<< from high to low VPC traffic flow <<|
-- | |
-- |_______________________________________|
--

-- The terms low and high are chosen to represent
-- numerical ordering of the two interfaces associated
-- with a VPC cross-connect. That is, the ATM interface
-- with the lower value of ifIndex is termed 'low',
-- while the other ATM interface associated with the
-- VPC cross-connect is termed 'high'. This terminology

Tesink Standards Track [Page 48]

RFC 2515 ATM Management Objects February 1999

-- is used to provide directional information; for
-- example, the atmVpCrossConnectL2HOperStatus applies
-- to the low->high direction, and
-- atmVpCrossConnectH2LOperStatus applies to the
-- high->low direction, as illustrated above.

atmVpCrossConnectIndexNext OBJECT-TYPE
SYNTAX INTEGER (0..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains an appropriate value to
be used for atmVpCrossConnectIndex when creating
entries in the atmVpCrossConnectTable. The value
0 indicates that no unassigned entries are
available. To obtain the atmVpCrossConnectIndex
value for a new entry, the manager issues a
management protocol retrieval operation to obtain
the current value of this object. After each
retrieval, the agent should modify the value to
the next unassigned index.
After a manager retrieves a value the agent will
determine through its local policy when this index
value will be made available for reuse."
::= { atmMIBObjects 8 }

-- The ATM VP Cross Connect Table

atmVpCrossConnectTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmVpCrossConnectEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ATM VP Cross Connect table for PVCs.
An entry in this table models two
cross-connected VPLs.
Each VPL must have its atmConnKind set
to pvc(1)."
::= { atmMIBObjects 9 }

atmVpCrossConnectEntry OBJECT-TYPE
SYNTAX AtmVpCrossConnectEntry

Tesink Standards Track [Page 49]

RFC 2515 ATM Management Objects February 1999

MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the ATM VP Cross Connect table.
This entry is used to model a bi-directional
ATM VP cross-connect which cross-connects
two VPLs.

Step-wise Procedures to set up a VP Cross-connect

Once the entries in the atmVplTable are created,
the following procedures are used
to cross-connect the VPLs together.

(1) The manager obtains a unique
atmVpCrossConnectIndex by reading the
atmVpCrossConnectIndexNext object.

(2) Next, the manager creates a set of one
or more rows in the ATM VP Cross Connect
Table, one for each cross-connection between
two VPLs. Each row is indexed by the ATM
interface port numbers and VPI values of the
two ends of that cross-connection.
This set of rows specifies the topology of the
VPC cross-connect and is identified by a single
value of atmVpCrossConnectIndex.

Negotiated VP Cross-Connect Establishment

(2a) The manager creates a row in this table by
setting atmVpCrossConnectRowStatus to
createAndWait(5). The agent checks the
requested topology and the mutual sanity of
the ATM traffic parameters and
service categories, i.e., the row creation
fails if:
- the requested topology is incompatible with
associated values of atmVplCastType,
- the requested topology is not supported
by the agent,
- the traffic/service category parameter values
associated with the requested row are
incompatible with those of already existing
rows for this VP cross-connect.
[For example, for setting up
a point-to-point VP cross-connect, the
ATM traffic parameters in the receive direction

Tesink Standards Track [Page 50]

RFC 2515 ATM Management Objects February 1999

of a VPL at the low end of the cross-connect
must equal to the traffic parameters in the
transmit direction of the other VPL at the
high end of the cross-connect,
otherwise, the row creation fails.]
The agent also checks for internal errors
in building the cross-connect.

The atmVpCrossConnectIndex values in the
corresponding atmVplTable rows are filled
in by the agent at this point.

(2b) The manager promotes the row in the
atmVpCrossConnectTable by setting
atmVpCrossConnectRowStatus to active(1). If
this set is successful, the agent has reserved
the resources specified by the ATM traffic
parameter and Service category values
for each direction of the VP cross-connect
in an ATM switch or network.

(3) The manager sets the
atmVpCrossConnectAdminStatus to up(1) in all
rows of this VP cross-connect to turn the
traffic flow on.

One-Shot VP Cross-Connect Establishment

A VP cross-connect may also be established in
one step by a set-request with all necessary
parameter values and atmVpCrossConnectRowStatus
set to createAndGo(4).

In contrast to the negotiated VP cross-connect
establishment which allows for detailed error
checking (i.e., set errors are explicitly linked
to particular resource acquisition failures),
the one-shot VP cross-connect establishment
performs the setup on one operation but does not
have the advantage of step-wise error checking.

VP Cross-Connect Retirement

A VP cross-connect identified by a particular
value of atmVpCrossConnectIndex is released by:

(1) Setting atmVpCrossConnectRowStatus of all

Tesink Standards Track [Page 51]

RFC 2515 ATM Management Objects February 1999

rows identified by this value of
atmVpCrossConnectIndex to destroy(6).
The agent may release all
associated resources, and the
atmVpCrossConnectIndex values in the
corresponding atmVplTable row are removed.
Note that a situation when only a subset of
the associated rows are deleted corresponds
to a VP topology change.

(2) After deletion of the appropriate
atmVpCrossConnectEntries, the manager may
set atmVplRowStatus to destroy(6) the
associated VPLs. The agent releases
the resources and removes the associated
rows in the atmVplTable.

VP Cross-connect Reconfiguration

At the discretion of the agent, a VP
cross-connect may be reconfigured by
adding and/or deleting leafs to/from
the VP topology as per the VP cross-connect
establishment/retirement procedures.
Reconfiguration of traffic/service category parameter
values requires release of the VP cross-connect
before those parameter values may by changed
for individual VPLs."
INDEX { atmVpCrossConnectIndex,
atmVpCrossConnectLowIfIndex,
atmVpCrossConnectLowVpi,
atmVpCrossConnectHighIfIndex,
atmVpCrossConnectHighVpi }
::= { atmVpCrossConnectTable 1 }

AtmVpCrossConnectEntry ::= SEQUENCE {
atmVpCrossConnectIndex INTEGER,
atmVpCrossConnectLowIfIndex InterfaceIndex,
atmVpCrossConnectLowVpi AtmVpIdentifier,
atmVpCrossConnectHighIfIndex InterfaceIndex,
atmVpCrossConnectHighVpi AtmVpIdentifier,
atmVpCrossConnectAdminStatus AtmVorXAdminStatus,
atmVpCrossConnectL2HOperStatus AtmVorXOperStatus,
atmVpCrossConnectH2LOperStatus AtmVorXOperStatus,
atmVpCrossConnectL2HLastChange AtmVorXLastChange,
atmVpCrossConnectH2LLastChange AtmVorXLastChange,
atmVpCrossConnectRowStatus RowStatus
}

Tesink Standards Track [Page 52]

RFC 2515 ATM Management Objects February 1999

atmVpCrossConnectIndex OBJECT-TYPE
SYNTAX INTEGER (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique value to identify this VP cross-connect.
For each VPL associated with this cross-connect,
the agent reports this cross-connect index value
in the atmVplCrossConnectIdentifier attribute of
the corresponding atmVplTable entries."
::= { atmVpCrossConnectEntry 1 }

atmVpCrossConnectLowIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ifIndex value of the ATM interface for
this VP cross-connect. The term low implies
that this ATM interface has the numerically lower
ifIndex value than the other ATM interface
identified in the same atmVpCrossConnectEntry."
::= { atmVpCrossConnectEntry 2 }

atmVpCrossConnectLowVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI value at the ATM interface
associated with the VP cross-connect that is
identified by atmVpCrossConnectLowIfIndex."
::= { atmVpCrossConnectEntry 3 }

atmVpCrossConnectHighIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ifIndex value of the ATM interface for
this VP cross-connect. The term high implies that
this ATM interface has the numerically higher
ifIndex value than the other ATM interface
identified in the same atmVpCrossConnectEntry."
::= { atmVpCrossConnectEntry 4 }

atmVpCrossConnectHighVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier

Tesink Standards Track [Page 53]

RFC 2515 ATM Management Objects February 1999

MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI value at the ATM interface
associated with the VP cross-connect that is
identified by atmVpCrossConnectHighIfIndex."
::= { atmVpCrossConnectEntry 5 }

atmVpCrossConnectAdminStatus OBJECT-TYPE
SYNTAX AtmVorXAdminStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The desired administrative status of this
bi-directional VP cross-connect."
DEFVAL { down }
::= { atmVpCrossConnectEntry 6 }

atmVpCrossConnectL2HOperStatus OBJECT-TYPE
SYNTAX AtmVorXOperStatus
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The operational status of the VP cross-connect
in one direction; (i.e., from the low to
high direction)."
::= { atmVpCrossConnectEntry 7 }

atmVpCrossConnectH2LOperStatus OBJECT-TYPE
SYNTAX AtmVorXOperStatus
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The operational status of the VP cross-connect
in one direction; (i.e., from the high to
low direction)."
::= { atmVpCrossConnectEntry 8 }

atmVpCrossConnectL2HLastChange OBJECT-TYPE
SYNTAX AtmVorXLastChange
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time this
VP cross-connect entered its current operational
state in the low to high direction."
::= { atmVpCrossConnectEntry 9 }

Tesink Standards Track [Page 54]

RFC 2515 ATM Management Objects February 1999

atmVpCrossConnectH2LLastChange OBJECT-TYPE
SYNTAX AtmVorXLastChange
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time this
VP cross-connect entered its current operational
in the high to low direction."
::= { atmVpCrossConnectEntry 10 }

atmVpCrossConnectRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this entry in the
atmVpCrossConnectTable. This object is used to
create a cross-connect for cross-connecting
VPLs which are created using the atmVplTable
or to change or delete an existing cross-connect.
This object must be initially set
to `createAndWait' or 'createAndGo'.
To turn on a VP cross-connect,
the atmVpCrossConnectAdminStatus
is set to `up'."
DEFVAL { createAndWait }
::= { atmVpCrossConnectEntry 11 }

-- ATM Virtual Channel (VC) Cross Connect Table

-- This table contains configuration and state
-- information of point-to-point,
-- point-to-multipoint or multipoint-to-multipoint
-- VC cross-connects for PVCs.

-- This table has read-create access and is used
-- to cross-connect the VCLs together in an ATM switch
-- or network that belong to a VC connection.
-- The atmVcCrossConnectIndex is used to associate
-- the related VCLs that are cross-connected together.

-- The model using step-wise procedures described for setting
-- up a VP cross-connect is also used for setting up
-- a VC cross-connect.

Tesink Standards Track [Page 55]

RFC 2515 ATM Management Objects February 1999

atmVcCrossConnectIndexNext OBJECT-TYPE
SYNTAX INTEGER (0..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains an appropriate value to
be used for atmVcCrossConnectIndex when creating
entries in the atmVcCrossConnectTable. The value
0 indicates that no unassigned entries are
available. To obtain the atmVcCrossConnectIndex
value for a new entry, the manager issues a
management protocol retrieval operation to obtain
the current value of this object. After each
retrieval, the agent should modify the value to
the next unassigned index.
After a manager retrieves a value the agent will
determine through its local policy when this index
value will be made available for reuse."
::= { atmMIBObjects 10 }

-- The ATM VC Cross Connect Table

atmVcCrossConnectTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtmVcCrossConnectEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ATM VC Cross Connect table for PVCs.
An entry in this table models two
cross-connected VCLs.
Each VCL must have its atmConnKind set
to pvc(1)."
::= { atmMIBObjects 11 }

atmVcCrossConnectEntry OBJECT-TYPE
SYNTAX AtmVcCrossConnectEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the ATM VC Cross Connect table.
This entry is used to model a bi-directional ATM
VC cross-connect cross-connecting two end points.

Step-wise Procedures to set up a VC Cross-connect

Tesink Standards Track [Page 56]

RFC 2515 ATM Management Objects February 1999

Once the entries in the atmVclTable are created,
the following procedures are used
to cross-connect the VCLs together to
form a VCC segment.

(1) The manager obtains a unique
atmVcCrossConnectIndex by reading the
atmVcCrossConnectIndexNext object.

(2) Next, the manager creates a set of one
or more rows in the ATM VC Cross Connect
Table, one for each cross-connection between
two VCLs. Each row is indexed by the ATM
interface port numbers and VPI/VCI values of
the two ends of that cross-connection.
This set of rows specifies the topology of the
VCC cross-connect and is identified by a single
value of atmVcCrossConnectIndex.

Negotiated VC Cross-Connect Establishment

(2a) The manager creates a row in this table by
setting atmVcCrossConnectRowStatus to
createAndWait(5). The agent checks the
requested topology and the mutual sanity of
the ATM traffic parameters and
service categories, i.e., the row creation
fails if:
- the requested topology is incompatible with
associated values of atmVclCastType,
- the requested topology is not supported
by the agent,
- the traffic/service category parameter values
associated with the requested row are
incompatible with those of already existing
rows for this VC cross-connect.
[For example, for setting up
a point-to-point VC cross-connect, the
ATM traffic parameters in the receive direction
of a VCL at the low end of the cross-connect
must equal to the traffic parameters in the
transmit direction of the other VCL at the
high end of the cross-connect,
otherwise, the row creation fails.]
The agent also checks for internal errors
in building the cross-connect.

The atmVcCrossConnectIndex values in the

Tesink Standards Track [Page 57]

RFC 2515 ATM Management Objects February 1999

corresponding atmVclTable rows are filled
in by the agent at this point.

(2b) The manager promotes the row in the
atmVcCrossConnectTable by setting
atmVcCrossConnectRowStatus to active(1). If
this set is successful, the agent has reserved
the resources specified by the ATM traffic
parameter and Service category values
for each direction of the VC cross-connect
in an ATM switch or network.

(3) The manager sets the
atmVcCrossConnectAdminStatus to up(1)
in all rows of this VC cross-connect to
turn the traffic flow on.

One-Shot VC Cross-Connect Establishment

A VC cross-connect may also be established in
one step by a set-request with all necessary
parameter values and atmVcCrossConnectRowStatus
set to createAndGo(4).

In contrast to the negotiated VC cross-connect
establishment which allows for detailed error
checking i.e., set errors are explicitly linked to
particular resource acquisition failures), the
one-shot VC cross-connect establishment
performs the setup on one operation but does
not have the advantage of step-wise error
checking.

VC Cross-Connect Retirement

A VC cross-connect identified by a particular
value of atmVcCrossConnectIndex is released by:

(1) Setting atmVcCrossConnectRowStatus of all rows
identified by this value of
atmVcCrossConnectIndex to destroy(6).
The agent may release all
associated resources, and the
atmVcCrossConnectIndex values in the
corresponding atmVclTable row are removed.
Note that a situation when only a subset of
the associated rows are deleted corresponds

Tesink Standards Track [Page 58]

RFC 2515 ATM Management Objects February 1999

to a VC topology change.

(2) After deletion of the appropriate
atmVcCrossConnectEntries, the manager may
set atmVclRowStatus to destroy(6) the
associated VCLs. The agent releases
the resources and removes the associated
rows in the atmVclTable.

VC Cross-Connect Reconfiguration

At the discretion of the agent, a VC
cross-connect may be reconfigured by
adding and/or deleting leafs to/from
the VC topology as per the VC cross-connect
establishment/retirement procedures.
Reconfiguration of traffic/service category parameter
values requires release of the VC cross-connect
before those parameter values may by changed
for individual VCLs."
INDEX { atmVcCrossConnectIndex,
atmVcCrossConnectLowIfIndex,
atmVcCrossConnectLowVpi,
atmVcCrossConnectLowVci,
atmVcCrossConnectHighIfIndex,
atmVcCrossConnectHighVpi,
atmVcCrossConnectHighVci }
::= { atmVcCrossConnectTable 1 }

AtmVcCrossConnectEntry ::= SEQUENCE {
atmVcCrossConnectIndex INTEGER,
atmVcCrossConnectLowIfIndex InterfaceIndex,
atmVcCrossConnectLowVpi AtmVpIdentifier,
atmVcCrossConnectLowVci AtmVcIdentifier,
atmVcCrossConnectHighIfIndex InterfaceIndex,
atmVcCrossConnectHighVpi AtmVpIdentifier,
atmVcCrossConnectHighVci AtmVcIdentifier,
atmVcCrossConnectAdminStatus AtmVorXAdminStatus,
atmVcCrossConnectL2HOperStatus AtmVorXOperStatus,
atmVcCrossConnectH2LOperStatus AtmVorXOperStatus,
atmVcCrossConnectL2HLastChange AtmVorXLastChange,
atmVcCrossConnectH2LLastChange AtmVorXLastChange,
atmVcCrossConnectRowStatus RowStatus
}

atmVcCrossConnectIndex OBJECT-TYPE
SYNTAX INTEGER (1..2147483647)
MAX-ACCESS not-accessible

Tesink Standards Track [Page 59]

RFC 2515 ATM Management Objects February 1999

STATUS current
DESCRIPTION
"A unique value to identify this VC cross-connect.
For each VCL associated with this cross-connect,
the agent reports this cross-connect index value
in the atmVclCrossConnectIdentifier attribute of
the corresponding atmVclTable entries."
::= { atmVcCrossConnectEntry 1 }

atmVcCrossConnectLowIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ifIndex value of the ATM interface for this
VC cross-connect. The term low implies
that this ATM interface has the numerically lower
ifIndex value than the other ATM interface
identified in the same atmVcCrossConnectEntry."
::= { atmVcCrossConnectEntry 2 }

atmVcCrossConnectLowVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI value at the ATM interface
associated with the VC cross-connect that is
identified by atmVcCrossConnectLowIfIndex."
::= { atmVcCrossConnectEntry 3 }

atmVcCrossConnectLowVci OBJECT-TYPE
SYNTAX AtmVcIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VCI value at the ATM interface
associated with this VC cross-connect that is
identified by atmVcCrossConnectLowIfIndex."
::= { atmVcCrossConnectEntry 4 }

atmVcCrossConnectHighIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ifIndex value for the ATM interface for
this VC cross-connect. The term high implies

Tesink Standards Track [Page 60]

RFC 2515 ATM Management Objects February 1999

that this ATM interface has the numerically higher
ifIndex value than the other ATM interface
identified in the same atmVcCrossConnectEntry."
::= { atmVcCrossConnectEntry 5 }

atmVcCrossConnectHighVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI value at the ATM interface
associated with the VC cross-connect that is
identified by atmVcCrossConnectHighIfIndex."
::= { atmVcCrossConnectEntry 6 }

atmVcCrossConnectHighVci OBJECT-TYPE
SYNTAX AtmVcIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VCI value at the ATM interface
associated with the VC cross-connect that is
identified by atmVcCrossConnectHighIfIndex."
::= { atmVcCrossConnectEntry 7 }

atmVcCrossConnectAdminStatus OBJECT-TYPE
SYNTAX AtmVorXAdminStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The desired administrative status of this
bi-directional VC cross-connect."
DEFVAL { down }
::= { atmVcCrossConnectEntry 8 }

atmVcCrossConnectL2HOperStatus OBJECT-TYPE
SYNTAX AtmVorXOperStatus
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current operational status of the
VC cross-connect in one direction; (i.e.,
from the low to high direction)."
::= { atmVcCrossConnectEntry 9 }

atmVcCrossConnectH2LOperStatus OBJECT-TYPE
SYNTAX AtmVorXOperStatus

Tesink Standards Track [Page 61]

RFC 2515 ATM Management Objects February 1999

MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current operational status of the
VC cross-connect in one direction; (i.e.,
from the high to low direction)."
::= { atmVcCrossConnectEntry 10 }

atmVcCrossConnectL2HLastChange OBJECT-TYPE
SYNTAX AtmVorXLastChange
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time this
VC cross-connect entered its current
operational state in low to high direction."
::= { atmVcCrossConnectEntry 11 }

atmVcCrossConnectH2LLastChange OBJECT-TYPE
SYNTAX AtmVorXLastChange
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time this
VC cross-connect entered its current
operational state in high to low direction."
::= { atmVcCrossConnectEntry 12 }

atmVcCrossConnectRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this entry in the
atmVcCrossConnectTable. This object is used to
create a new cross-connect for cross-connecting
VCLs which are created using the atmVclTable
or to change or delete existing cross-connect.
This object must be initially set to
`createAndWait' or 'createAndGo'.
To turn on a VC cross-connect,
the atmVcCrossConnectAdminStatus
is set to `up'."
DEFVAL { createAndWait }
::= { atmVcCrossConnectEntry 13 }

-- AAL5 Virtual Channel Connection Performance Statistics

Tesink Standards Track [Page 62]

RFC 2515 ATM Management Objects February 1999

-- Table

-- This table contains the AAL5
-- performance statistics of a VCC at the
-- interface associated with an AAL5 entity in an ATM
-- host or ATM switch.

aal5VccTable OBJECT-TYPE
SYNTAX SEQUENCE OF Aal5VccEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains AAL5 VCC performance
parameters."
::= { atmMIBObjects 12 }

aal5VccEntry OBJECT-TYPE
SYNTAX Aal5VccEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This list contains the AAL5 VCC
performance parameters and is indexed
by ifIndex values of AAL5 interfaces
and the associated VPI/VCI values."
INDEX { ifIndex, aal5VccVpi, aal5VccVci }
::= { aal5VccTable 1 }

Aal5VccEntry ::= SEQUENCE {
aal5VccVpi AtmVpIdentifier,
aal5VccVci AtmVcIdentifier,
aal5VccCrcErrors Counter32,
aal5VccSarTimeOuts Counter32,
aal5VccOverSizedSDUs Counter32
}

aal5VccVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI value of the AAL5 VCC at the
interface identified by the ifIndex."
::= { aal5VccEntry 1 }

aal5VccVci OBJECT-TYPE

Tesink Standards Track [Page 63]

RFC 2515 ATM Management Objects February 1999

SYNTAX AtmVcIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VCI value of the AAL5 VCC at the
interface identified by the ifIndex."
::= { aal5VccEntry 2 }

aal5VccCrcErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of AAL5 CPCS PDUs received with
CRC-32 errors on this AAL5 VCC at the
interface associated with an AAL5 entity."
::= { aal5VccEntry 3 }

aal5VccSarTimeOuts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of partially re-assembled AAL5
CPCS PDUs which were discarded
on this AAL5 VCC at the interface associated
with an AAL5 entity because they
were not fully re-assembled within the
required time period. If the re-assembly
timer is not supported, then this object
contains a zero value."
::= { aal5VccEntry 4 }

aal5VccOverSizedSDUs OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of AAL5 CPCS PDUs discarded
on this AAL5 VCC at the interface
associated with an AAL5 entity because the
AAL5 SDUs were too large."
::= { aal5VccEntry 5 }

--
-- The following object may be used in conjunction with
-- the atmTrafficDescrParamTable for the creation of

Tesink Standards Track [Page 64]

RFC 2515 ATM Management Objects February 1999

-- new table entries.
--

atmTrafficDescrParamIndexNext OBJECT-TYPE
SYNTAX INTEGER (0..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains an appropriate value to
be used for atmTrafficDescrParamIndex when
creating entries in the
atmTrafficDescrParamTable.
The value 0 indicates that no unassigned
entries are available. To obtain the
atmTrafficDescrParamIndex value for a new
entry, the manager issues a management
protocol retrieval operation to obtain the
current value of this object. After each
retrieval, the agent should modify the value
to the next unassigned index.
After a manager retrieves a value the agent will
determine through its local policy when this index
value will be made available for reuse."
::= { atmMIBObjects 13 }

-- Conformance Information

atmMIBConformance OBJECT IDENTIFIER ::= { atmMIB 2 }

atmMIBGroups OBJECT IDENTIFIER
::= { atmMIBConformance 1 }
atmMIBCompliances OBJECT IDENTIFIER
::= { atmMIBConformance 2 }

-- Compliance Statements

atmMIBCompliance2 MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for SNMP entities
including networks which have ATM and
AAL5 interfaces."

MODULE -- this module
--
-- ****** Interface and Traffic Descriptor Support ***

Tesink Standards Track [Page 65]

RFC 2515 ATM Management Objects February 1999

--
MANDATORY-GROUPS {atmInterfaceConfGroup2,
atmTrafficDescrGroup2 }

OBJECT atmInterfaceMaxVpcs
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMaxVccs
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMaxActiveVpiBits
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required.
At the ATM UNI the maximum number of
active VPI bits configured for use ranges
from 0 to 8 only.
Implementations may support smaller ranges."
OBJECT atmInterfaceMaxActiveVciBits
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required.
Implementations may support smaller ranges."

OBJECT atmInterfaceIlmiVpi
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceIlmiVci
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMyNeighborIpAddress
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMyNeighborIfName
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

Tesink Standards Track [Page 66]

RFC 2515 ATM Management Objects February 1999

OBJECT atmInterfaceSubscrAddress
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParamIndexNext
DESCRIPTION
"This object is only required for systems
that support the creation of entries in
the atmTrafficDescrParamTable."

OBJECT atmTrafficDescrType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam1
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam2
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam3
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam4
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam5
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmServiceCategory
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrRowStatus
SYNTAX INTEGER {active(1)}

Tesink Standards Track [Page 67]

RFC 2515 ATM Management Objects February 1999

-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

OBJECT atmTrafficFrameDiscard
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

--
-- ****** DS3 PLCP Support **************************
--
GROUP atmInterfaceDs3PlcpGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement the
DS3 PLCP layer."
--
-- ****** TC Sublayer Support ********************************
--
GROUP atmInterfaceTCGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement the
TC Sublayer."

--
-- ****** VPC Support *******************************
--
GROUP atmVpcTerminationGroup2
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VPLs that terminate VPCs (i.e., ones which
are NOT cross-connected to other VPLs)."

GROUP atmVplCrossConnectGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VPLs that are not associated with VCLs
and are cross-connected to other VPLs
for VPCs."

Tesink Standards Track [Page 68]

RFC 2515 ATM Management Objects February 1999

GROUP atmVpPvcCrossConnectGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VPLs that are not associated with VCLs
and are cross-connected to other VPLs
for permanent VPCs (i.e., PVCs).
This group is not used to crossconnect
a PVC with an SVC to form a Soft PVC."

OBJECT atmVplAdminStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVplReceiveTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVplTransmitTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVplRowStatus
SYNTAX INTEGER {active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

OBJECT atmVplCastType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVplConnKind
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVpCrossConnectAdminStatus
MIN-ACCESS read-only
DESCRIPTION

Tesink Standards Track [Page 69]

RFC 2515 ATM Management Objects February 1999

"Write access is not required."

OBJECT atmVpCrossConnectRowStatus
SYNTAX INTEGER {active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

--
-- ****** VCC Support *******************************
--
GROUP atmVccTerminationGroup2
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VCLs that terminate VCCs (i.e., ones which
are NOT cross-connected to other VCLs)."

GROUP atmVclCrossConnectGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VCLs that are cross-connected to other VCLs
for VCCs."

GROUP atmVcPvcCrossConnectGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VCLs that are cross-connected to other
VCLs for permanent VCCs (i.e., PVCs).
This group is not used to crossconnect
a PVC with an SVC to form a Soft PVC."

OBJECT atmVclAdminStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVclReceiveTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

Tesink Standards Track [Page 70]

RFC 2515 ATM Management Objects February 1999

OBJECT atmVclTransmitTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVccAalType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVclRowStatus
SYNTAX INTEGER {active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

OBJECT atmVclCastType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVclConnKind
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVcCrossConnectAdminStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVcCrossConnectRowStatus
SYNTAX INTEGER { active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."
--
-- ****** AAL5 Support ******************************
--
GROUP aal5VccGroup

Tesink Standards Track [Page 71]

RFC 2515 ATM Management Objects February 1999

DESCRIPTION
"This group is mandatory for the
AAL5 virtual connections only."
OBJECT atmVccAal5CpcsTransmitSduSize
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVccAal5CpcsReceiveSduSize
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVccAal5EncapsType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
::= { atmMIBCompliances 2 }

-- Units of Conformance

atmInterfaceDs3PlcpGroup OBJECT-GROUP
OBJECTS {atmInterfaceDs3PlcpSEFSs,
atmInterfaceDs3PlcpAlarmState,
atmInterfaceDs3PlcpUASs}
STATUS current
DESCRIPTION
"A collection of objects providing information
about DS3 PLCP layer at an ATM interface."
::= { atmMIBGroups 3 }

atmInterfaceTCGroup OBJECT-GROUP
OBJECTS { atmInterfaceOCDEvents,
atmInterfaceTCAlarmState }
STATUS current
DESCRIPTION
"A collection of objects providing information
about TC sublayer at an ATM interface."
::= { atmMIBGroups 4 }

aal5VccGroup OBJECT-GROUP
OBJECTS {atmVccAal5CpcsTransmitSduSize,
atmVccAal5CpcsReceiveSduSize,
atmVccAal5EncapsType,
aal5VccCrcErrors, aal5VccSarTimeOuts,
aal5VccOverSizedSDUs }
STATUS current

Tesink Standards Track [Page 72]

RFC 2515 ATM Management Objects February 1999

DESCRIPTION
"A collection of objects providing
AAL5 configuration and performance statistics
of a VCC."
::= { atmMIBGroups 9 }

atmInterfaceConfGroup2 OBJECT-GROUP
OBJECTS {
atmInterfaceMaxVpcs, atmInterfaceMaxVccs,
atmInterfaceConfVpcs, atmInterfaceConfVccs,
atmInterfaceMaxActiveVpiBits,
atmInterfaceMaxActiveVciBits,
atmInterfaceIlmiVpi,
atmInterfaceIlmiVci,
atmInterfaceMyNeighborIpAddress,
atmInterfaceMyNeighborIfName,
atmInterfaceCurrentMaxVpiBits,
atmInterfaceCurrentMaxVciBits,
atmInterfaceSubscrAddress }
STATUS current
DESCRIPTION
"A collection of objects providing configuration
information about an ATM interface."
::= { atmMIBGroups 10 }

atmTrafficDescrGroup2 OBJECT-GROUP
OBJECTS {
atmTrafficDescrType, atmTrafficDescrParam1,
atmTrafficDescrParam2, atmTrafficDescrParam3,
atmTrafficDescrParam4, atmTrafficDescrParam5,
atmTrafficDescrRowStatus, atmServiceCategory,
atmTrafficFrameDiscard,
atmTrafficDescrParamIndexNext }
STATUS current
DESCRIPTION
"A collection of objects providing information
about ATM traffic descriptor type and
the associated parameters."
::= { atmMIBGroups 11 }

atmVpcTerminationGroup2 OBJECT-GROUP
OBJECTS {atmVplOperStatus, atmVplAdminStatus,
atmVplLastChange,
atmVplReceiveTrafficDescrIndex,
atmVplTransmitTrafficDescrIndex,
atmVplRowStatus, atmVplCastType,
atmVplConnKind }
STATUS current

Tesink Standards Track [Page 73]

RFC 2515 ATM Management Objects February 1999

DESCRIPTION
"A collection of objects providing information
about a VPL at an ATM interface which
terminates a VPC (i.e., one which is NOT
cross-connected to other VPLs)."
::= { atmMIBGroups 12 }

atmVccTerminationGroup2 OBJECT-GROUP
OBJECTS {atmVclOperStatus, atmVclAdminStatus,
atmVclLastChange,
atmVclReceiveTrafficDescrIndex,
atmVclTransmitTrafficDescrIndex,
atmVccAalType, atmVclRowStatus,
atmVclCastType, atmVclConnKind }
STATUS current
DESCRIPTION
"A collection of objects providing information
about a VCL at an ATM interface
which terminates a VCC (i.e., one which is
NOT cross-connected to other VCLs)."
::= { atmMIBGroups 13 }

atmVplCrossConnectGroup OBJECT-GROUP
OBJECTS { atmVplReceiveTrafficDescrIndex,
atmVplTransmitTrafficDescrIndex,
atmVplOperStatus, atmVplLastChange,
atmVplRowStatus,
atmVplCastType, atmVplConnKind }
STATUS current
DESCRIPTION
"A collection of objects providing
information about the VPLs that
are cross-connected together."
::= { atmMIBGroups 14 }

atmVpPvcCrossConnectGroup OBJECT-GROUP
OBJECTS { atmVpCrossConnectAdminStatus,
atmVpCrossConnectL2HOperStatus,
atmVpCrossConnectH2LOperStatus,
atmVpCrossConnectL2HLastChange,
atmVpCrossConnectH2LLastChange,
atmVpCrossConnectRowStatus,
atmVplCrossConnectIdentifier,
atmVpCrossConnectIndexNext }
STATUS current
DESCRIPTION
"A collection of objects providing
information about a VP cross-connect

Tesink Standards Track [Page 74]

RFC 2515 ATM Management Objects February 1999

for PVCs. These objects are not used
for Soft PVCs or SVCs."
::= { atmMIBGroups 15 }

atmVclCrossConnectGroup OBJECT-GROUP
OBJECTS { atmVclReceiveTrafficDescrIndex,
atmVclTransmitTrafficDescrIndex,
atmVclOperStatus, atmVclLastChange,
atmVclRowStatus,
atmVclCastType, atmVclConnKind }
STATUS current
DESCRIPTION
"A collection of objects providing
information about the VCLs that
are cross-connected together."
::= { atmMIBGroups 16 }

atmVcPvcCrossConnectGroup OBJECT-GROUP
OBJECTS { atmVcCrossConnectAdminStatus,
atmVcCrossConnectL2HOperStatus,
atmVcCrossConnectH2LOperStatus,
atmVcCrossConnectL2HLastChange,
atmVcCrossConnectH2LLastChange,
atmVcCrossConnectRowStatus,
atmVclCrossConnectIdentifier,
atmVcCrossConnectIndexNext }
STATUS current
DESCRIPTION
"A collection of objects providing
information about a VC cross-connect
for PVCs. These objects are not used
for Soft PVCs or SVCs."
::= { atmMIBGroups 17 }

-- Deprecated Definitions - Objects

-- atmInterfaceAddressType
-- atmTrafficQoSClass

-- Deprecated Definitions - Compliance

atmMIBCompliance MODULE-COMPLIANCE
STATUS deprecated
DESCRIPTION
"The compliance statement for SNMP entities
including networks which have ATM and

Tesink Standards Track [Page 75]

RFC 2515 ATM Management Objects February 1999

AAL5 interfaces."

MODULE -- this module
MANDATORY-GROUPS {atmInterfaceConfGroup,
atmTrafficDescrGroup}

OBJECT atmInterfaceMaxVpcs
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMaxVccs
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMaxActiveVpiBits
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMaxActiveVciBits
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceIlmiVpi
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceIlmiVci
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMyNeighborIpAddress
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmInterfaceMyNeighborIfName
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrType
MIN-ACCESS read-only

Tesink Standards Track [Page 76]

RFC 2515 ATM Management Objects February 1999

DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam1
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam2
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam3
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam4
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrParam5
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficQoSClass
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmTrafficDescrRowStatus
SYNTAX INTEGER {active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

GROUP atmInterfaceDs3PlcpGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement the
DS3 PLCP layer."

Tesink Standards Track [Page 77]

RFC 2515 ATM Management Objects February 1999

GROUP atmInterfaceTCGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement the
TC Sublayer."

GROUP atmVpcTerminationGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VPLs that terminate VPCs (i.e., ones which
are NOT cross-connected to other VPLs)."

GROUP atmVpCrossConnectGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VPLs that are not associated with VCLs
and are cross-connected to other VPLs."

OBJECT atmVplAdminStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVplReceiveTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVplTransmitTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVplRowStatus
SYNTAX INTEGER {active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

OBJECT atmVpCrossConnectAdminStatus
MIN-ACCESS read-only
DESCRIPTION

Tesink Standards Track [Page 78]

RFC 2515 ATM Management Objects February 1999

"Write access is not required."

OBJECT atmVpCrossConnectRowStatus
SYNTAX INTEGER {active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

GROUP atmVccTerminationGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VCLs that terminate VCCs (i.e., ones which
are NOT cross-connected to other VCLs)."

GROUP atmVcCrossConnectGroup
DESCRIPTION
"This group is mandatory only for those
ATM interfaces which implement ATM
VCLs that are cross-connected to
other VCLs."

OBJECT atmVclAdminStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVclReceiveTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVclTransmitTrafficDescrIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVccAalType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVclRowStatus
SYNTAX INTEGER {active(1)}

Tesink Standards Track [Page 79]

RFC 2515 ATM Management Objects February 1999

-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

OBJECT atmVcCrossConnectAdminStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVcCrossConnectRowStatus
SYNTAX INTEGER { active(1)}
-- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the six enumerated values for the
RowStatus textual convention need be
supported, specifically: active(1)."

GROUP aal5VccGroup
DESCRIPTION
"This group is mandatory for the
AAL5 virtual connections only."

OBJECT atmVccAal5CpcsTransmitSduSize
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVccAal5CpcsReceiveSduSize
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."

OBJECT atmVccAal5EncapsType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
::= { atmMIBCompliances 1 }

-- Deprecated Definitions - Groups

Tesink Standards Track [Page 80]

RFC 2515 ATM Management Objects February 1999

atmInterfaceConfGroup OBJECT-GROUP
OBJECTS {
atmInterfaceMaxVpcs, atmInterfaceMaxVccs,
atmInterfaceConfVpcs, atmInterfaceConfVccs,
atmInterfaceMaxActiveVpiBits,
atmInterfaceMaxActiveVciBits,
atmInterfaceIlmiVpi,
atmInterfaceIlmiVci,
atmInterfaceAddressType,
atmInterfaceAdminAddress,
atmInterfaceMyNeighborIpAddress,
atmInterfaceMyNeighborIfName }
STATUS deprecated
DESCRIPTION
"A collection of objects providing configuration
information about an ATM interface."
::= { atmMIBGroups 1 }

atmTrafficDescrGroup OBJECT-GROUP
OBJECTS {
atmTrafficDescrType, atmTrafficDescrParam1,
atmTrafficDescrParam2, atmTrafficDescrParam3,
atmTrafficDescrParam4, atmTrafficDescrParam5,
atmTrafficQoSClass, atmTrafficDescrRowStatus}
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
about ATM traffic descriptor type and
the associated parameters."
::= { atmMIBGroups 2 }

atmVpcTerminationGroup OBJECT-GROUP
OBJECTS {atmVplOperStatus, atmVplAdminStatus,
atmVplLastChange,
atmVplReceiveTrafficDescrIndex,
atmVplTransmitTrafficDescrIndex,
atmVplRowStatus }
STATUS deprecated
DESCRIPTION
"A collection of objects providing
information about a VPL at an ATM interface
which terminates a VPC
(i.e., one which is NOT cross-connected
to other VPLs)."
::= { atmMIBGroups 5 }

atmVccTerminationGroup OBJECT-GROUP
OBJECTS {atmVclOperStatus, atmVclAdminStatus,

Tesink Standards Track [Page 81]

RFC 2515 ATM Management Objects February 1999

atmVclLastChange,
atmVclReceiveTrafficDescrIndex,
atmVclTransmitTrafficDescrIndex,
atmVccAalType, atmVclRowStatus }
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
about a VCL at an ATM interface
which terminates a VCC (i.e., one which is
NOT cross-connected to other VCLs)."
::= { atmMIBGroups 6 }

atmVpCrossConnectGroup OBJECT-GROUP
OBJECTS { atmVplReceiveTrafficDescrIndex,
atmVplTransmitTrafficDescrIndex,
atmVplOperStatus, atmVplRowStatus,
atmVpCrossConnectAdminStatus,
atmVpCrossConnectL2HOperStatus,
atmVpCrossConnectH2LOperStatus,
atmVpCrossConnectL2HLastChange,
atmVpCrossConnectH2LLastChange,
atmVpCrossConnectRowStatus,
atmVplCrossConnectIdentifier,
atmVpCrossConnectIndexNext }
STATUS deprecated
DESCRIPTION
"A collection of objects providing
information about a VP cross-connect
and the associated VPLs that are
cross-connected together."
::= { atmMIBGroups 7 }

atmVcCrossConnectGroup OBJECT-GROUP
OBJECTS { atmVclReceiveTrafficDescrIndex,
atmVclTransmitTrafficDescrIndex,
atmVclOperStatus, atmVclRowStatus,
atmVcCrossConnectAdminStatus,
atmVcCrossConnectL2HOperStatus,
atmVcCrossConnectH2LOperStatus,
atmVcCrossConnectL2HLastChange,
atmVcCrossConnectH2LLastChange,
atmVcCrossConnectRowStatus,
atmVclCrossConnectIdentifier,
atmVcCrossConnectIndexNext }
STATUS deprecated
DESCRIPTION
"A collection of objects providing
information about a VC cross-connect

Tesink Standards Track [Page 82]

RFC 2515 ATM Management Objects February 1999

and the associated VCLs that are
cross-connected together."
::= { atmMIBGroups 8 }

-- {atmMIB 3} has been used by [19].

END

10. Acknowledgments

This memo is the result of the work of the AToMMIB Working Group.

11. References

[1] Harrington, D., Presuhn, R. and B. Wijnen, "An
Architecture for Describing SNMP Management Frameworks", RFC
2271, January 1998.

[2] Rose, M. and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based Internets", STD 16, RFC
1155, May 1990.

[3] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16,
RFC 1212, March 1991.

[4] Rose, M., "A Convention for Defining Traps for use with the
SNMP", RFC 1215, March 1991.

[5] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M. and S.
Waldbusser, "Structure of Management Information for Version 2
of the Simple Network Management Protocol (SNMPv2)", RFC 1902,
January 1996.

[6] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M. and S.
Waldbusser, "Textual Conventions for Version 2 of the Simple
Network Management Protocol (SNMPv2)", RFC 1903, January 1996.

[7] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M. and S.
Waldbusser, "Conformance Statements for Version 2 of the Simple
Network Management Protocol (SNMPv2)", RFC 1904, January 1996.

[8] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, May 1990.

[9] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M. and S.
Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901,
January 1996.

Tesink Standards Track [Page 83]

RFC 2515 ATM Management Objects February 1999

[10] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M. and S.
Waldbusser, "Transport Mappings for Version 2 of the Simple
Network Management Protocol (SNMPv2)", RFC 1906, January 1996.

[11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message
Processing and Dispatching for the Simple Network Management
Protocol (SNMP)", RFC 2272, January 1998.

[12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM)
for version 3 of the Simple Network Management Protocol
(SNMPv3)", RFC 2274, January 1998.

[13] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M. and S.
Waldbusser, "Protocol Operations for Version 2 of the Simple
Network Management Protocol (SNMPv2)", RFC 1905, January 1996.

[14] Levi, D., Meyer, P. and B. Stewart, MPv3 Applications", RFC
2273, January 1998.

[15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access
Control Model (VACM) for the Simple Network Management Protocol
(SNMP)", RFC 2275, January 1998.

[16] McCloghrie, K. and M. Rose, Editors, "Management Information
Base for Network Management of TCP/IP-based internets: MIB-II",
STD 17, RFC 1213, March 1991.

[17] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB",
RFC 2233, November 1997.

[18] Brown, T. and K. Tesink, "Definitions of Managed Objects for
SMDS Interfaces", RFC 1694, May 1994.

[19] Noto, M., Spiegel, E. and K. Tesink, Editors, "Definitions of
Textual Conventions and OBJECT-IDENTITIES for ATM Management",
RFC 2514, February 1999.

[20] ATM Forum, ATM User-Network Interface, Version 3.0 (UNI 3.0)
Specification, 1994.

[21] ATM Forum, B-ICI Specification, Version 2.0, af-bici-0013.002,
November 1995.

[22] "ATM Forum Private Network-Network Interface Specification,
Version 1.0 (PNNI 1.0)", af-sig-0055.000, March 1996.

[23] "ATM Forum Integrated Local Management Interface (ILMI)
Specification", Version 4.0", af-ilmi-0065.000, September 1996.

Tesink Standards Track [Page 84]

RFC 2515 ATM Management Objects February 1999

[24] Ahmed, M. and K. Tesink, "Definitions of Managed Objects for ATM
Management Version 8.0 using SMIv2", RFC 1695, August 1994.

12. Security Considerations

There are a number of management objects defined in this MIB that
have a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations.

The managed objects in this MIB contain sensitive information since,
collectively, they allow tracing and influencing of virtual
connections in ATM switches or networks and provide information of
their traffic characteristics.

It is thus important to control even GET access to these objects and
possibly to even encrypt the values of these object when sending them
over the network via SNMP. Not all versions of SNMP provide features
for such a secure environment.

SNMPv1 by itself is not a secure environment. Even if the network
itself is secure (for example by using IPSec), even then, there is no
control as to who on the secure network is allowed to access and
GET/SET (read/change/create/delete) the objects in this MIB.

It is recommended that the implementers consider the security
features as provided by the SNMPv3 framework. Specifically, the use
of the User-based Security Model RFC 2274 [12] and the View-based
Access Control Model RFC 2275 [15] is recommended.

It is then a customer/user responsibility to ensure that the SNMP
entity giving access to an instance of this MIB, is properly
configured to give access to the objects only to those principals
(users) that have legitimate rights to indeed GET or SET
(change/create/delete) them.

13. Author's Address

Kaj Tesink
Bellcore
331 Newman Springs Road
P.O. Box 7020
Red Bank, NJ 07701-7020

Phone: (732) 758-5254
EMail: [email protected]

Tesink Standards Track [Page 85]

RFC 2515 ATM Management Objects February 1999

14. Intellectual Property

The IETF takes no position regarding the validity or scope of any
intellectual property or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; neither does it represent that it
has made any effort to identify any such rights. Information on the
IETF's procedures with respect to rights in standards-track and
standards-related documentation can be found in BCP-11. Copies of
claims of rights made available for publication and any assurances of
licenses to be made available, or the result of an attempt made to
obtain a general license or permission for the use of such
proprietary rights by implementors or users of this specification can
be obtained from the IETF Secretariat.

The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights which may cover technology that may be required to practice
this standard. Please address the information to the IETF Executive
Director.

Tesink Standards Track [Page 86]

RFC 2515 ATM Management Objects February 1999

15. Full Copyright Statement

Copyright (C) The Internet Society (1999). All Rights Reserved.

This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.

The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.

This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Tesink Standards Track [Page 87]