Network Working Group K. Rehbehn

Network Working Group K. Rehbehn
Request for Comments: 2955 Megisto Systems
Category: Standards Track O. Nicklass
RAD Data Communications, Ltd.
G. Mouradian
AT&T Labs
October 2000

Definitions of Managed Objects
for Monitoring and Controlling the
Frame Relay/ATM PVC Service Interworking Function

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 (2000). All Rights Reserved.

Abstract

This memo defines a Management Information Base (MIB) to configure,
monitor, and control a service interworking function (IWF) for
Permanent Virtual Connections (PVC) between Frame Relay and
Asynchronous Transfer Mode (ATM) technologies.

Table of Contents

1. The SNMP Management Framework ............................... 2
2. Conventions ................................................. 3
3. Overview .................................................... 3
3.1 Frame Relay/ATM Service Interworking Background ............ 4
3.2 Structure of the MIB ....................................... 4
3.3 Relationship to Other MIBs ................................. 5
3.3.1 Frame Relay Service MIB .................................. 6
3.3.2 Frame Relay DTE MIB ...................................... 6
3.3.3 ATM MIB .................................................. 6
3.3.4 IF MIB ................................................... 7
3.4 Point to Multipoint Considerations ......................... 7
3.5 Theory of Operation ........................................ 7
3.5.1 Creation Process ......................................... 7
3.5.2 Destruction Process ...................................... 10

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RFC 2955 FR to ATM Service Interworking MIB October 2000

3.5.3 Modification Process ..................................... 11
4. Object Definitions .......................................... 11
4.1 The FR/ATM PVC Service IWF Connection Group ................ 13
4.2 The FR/ATM PVC Service IWF Connection Descriptor Group ..... 21
5. Augmentation of ATM MIB VCL Endpoint Entry (atmVclEntry) .... 27
6. Frame Relay/ATM PVC Service Interworking NOTIFICATION ....... 29
7. Conformance Information ..................................... 29
7.1 Compliance Statement For Equipment ......................... 29
7.2 Compliance Statement For Service (CNM Interface) ........... 30
7.3 Units of Conformance ....................................... 32
7.3.1 Basic FR/ATM IWF PVC Connection Group .................... 32
7.3.2 FR/ATM IWF PVC Connection Descriptor Group ............... 32
7.3.3 ATM MIB VCL Endpoint Table Augmentation .................. 33
7.3.4 Notification Group ....................................... 33
8. Acknowledgments ............................................. 34
9. References .................................................. 34
10. Security Considerations .................................... 36
11. Authors' Addresses ......................................... 37
12. Intellectual Property Rights ............................... 38
13. Full Copyright Statement ................................... 39

1. The SNMP Management Framework

The SNMP Management Framework presently consists of five major
components:

o An overall architecture, described in RFC 2571 [1].

o 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 STD 58, RFC 2578
[5], STD 58, RFC 2579 [6] and STD 58, RFC 2580 [7].

o 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]. The third version of the message protocol is called
SNMPv3 and described in RFC 1906 [10], RFC 2572 [11] and RFC 2574
[12].

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RFC 2955 FR to ATM Service Interworking MIB October 2000

o 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].

o A set of fundamental applications described in RFC 2573 [14] and
the view-based access control mechanism described in RFC 2575
[15].

A more detailed introduction to the current SNMP Management Framework
can be found in RFC 2570 [16].

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 (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.

2. Conventions

The keywords MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,
SHOULD NOT, RECOMMENDED, NOT RECOMMENDED, MAY, and OPTIONAL, when
they appear in this document, are to be interpreted as described in
RFC 2119 [23].

3. Overview

This document defines a Management Information Base (MIB) for
monitoring and controlling a service interworking function (IWF) for
Permanent Virtual Connections (PVC) between Frame Relay and
Asynchronous Transfer Mode (ATM) technologies. The agreements on
which this MIB is based were reached jointly by the Frame Relay Forum
and the ATM Forum and are documented in the Frame Relay Forum
Document FRF.8 [17].

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3.1. Frame Relay/ATM Service Interworking Background

Frame relay to ATM interworking is a function that exchanges Protocol
Data Units (PDU) between a frame relay service user and an ATM
service user. Two types of interworking functions are specified for
frame relay and ATM permanent virtual connection (PVC) service users:
network interworking and service interworking.

Network interworking provides PDU forwarding between frame relay
service users inter-connected by an ATM service. Both endpoints are
frame relay PVCs. Frame Relay to ATM PVC Network Interworking is
defined in [20].

Service interworking provides PDU forwarding so that the ATM service
user performs no frame relaying service-specific functions and the
frame relay service user performs no ATM service-specific functions.
Optionally, the service IWF translates particular higher layer
protocols to satisfy the requirements of end-systems. Frame Relay to
ATM PVC Service Interworking is defined in [17].

This MIB describes management objects used to provision, monitor, and
control a Frame Relay/ATM PVC Service IWF.

FRF.8 [17] does not address point-to-multipoint applications of the
IWF. Implementations MAY provide support for point-to-multipoint
capability using this MIB.

Consult FRF.8 [17] for more details on the operation of a Frame
Relay/ATM PVC Service IWF.

3.2. Structure of the MIB

The Frame Relay/ATM PVC Service IWF managed objects are organized as
follows:

(1) FR/ATM PVC Service IWF cross-connect table,

(2) Connection description table, and

(3) Notification object

The IWF cross-connect table contains one or more rows for each
inter-worked connection. Each inter-worked connection is uniquely
identified by the frAtmIwfConnIndex object. In the case of point-to-
point, a single row is present. In the case of point-to-multipoint,
one row exists for each multipoint destination. Index objects for
the ATM port, VPI, VCI, frame relay port, and frame relay DLCI
distinguish the constituent rows used in a point-to-multipoint case.

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Each inter-worked connection has attributes governing behavior of the
IWF. These attributes describe how the IWF should transform a PDU
during the forwarding process and provide rules for:

(1) Mapping the ATM CLP bit to frame relay DE bit

(2) Mapping the ATM congestion notification bit to frame relay
congestion bits

(3) Mapping higher protocol encapsulations between ATM and frame
relay

(4) Performing fragmentation and reassembly

(5) Performing ARP translation between ATM and frame relay

Typically, most connections share the same attributes. The
attributes are represented in this MIB by the connection description
table. Each row of the connection description table contains the
attribute settings common to one or more inter-worked connections.
One example would be full mapping and translation. All cross-connect
table entries that require full mapping and translation services set
the frAtmIwfConnectionDescriptor object to the index value for the
connection description table row that contains objects set to values
that provide full mapping and translation services.

A notification object provides cross-connect status change alerts.

3.3. Relationship to Other MIBs

The Frame Relay/ATM PVC Service IWF MIB describes the cross-
connections between frame relay and ATM service users. Each PVC
endpoint is provisioned and managed with a technology-specific MIB as
described below.

Each technology-specific MIB has a table of PVC endpoints (indexed by
ifIndex and logical link address such as the DLCI or VPI/VCI). In
the absence of interworking, two endpoints are cross-connected via a
technology-specific cross connect table (e.g., the
atmVcCrossConnectTable in the ATM MIB). However, a connection
between a frame relay endpoint and an ATM endpoint requires a cross-
connect in the ATM IWF MIB.

The following sections describe the relationship between the
technology-specific MIBs and the FR/ATM PVC Service IWF MIB.

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3.3.1. Frame Relay Service MIB

Frame relay PVC endpoints are provisioned as rows in the Frame Relay
Services MIB [19] endpoint table.

Each frame relay PVC endpoint is described in the frPVCEndptTable. A
connection between two frame relay endpoints is described by an entry
in the frame relay PVC cross-connect table frPVCConnectTable. The
frPVCEndptConnectIdentifier object of each endpoint points to the
frPVCConnectTable cross-connect table row for the connection.

In the case of an inter-worked connection, the
frPVCEndptConnectIdentifier object is set to zero. Instead, the
frPVCEndptAtmIwfConnIndex object is set to the index of the FR/ATM
IWF cross-connect table row.

The frame relay PVC cross-connect table (frPVCConnectTable) does not
contain an entry for the FR/ATM inter-worked connection.

Note that the frPVCEndptConnectIdentifier and
frPVCEndptAtmIwfConnIndex objects are set by the system as a side-
effect of cross-connect establishment. Consequently, these objects
are read-only.

3.3.2. Frame Relay DTE MIB

The Frame Relay DTE MIB described in [24] has no relevance to the
FR/ATM PVC Service IWF MIB.

3.3.3. ATM MIB

ATM PVC endpoints are provisioned as rows in the ATM MIB [21] virtual
connection link table.

Each ATM connection endpoint is described in the atmVclTable. A
connection between two ATM endpoints is described by an entry in the
ATM VCL cross-connect table atmVcCrossConnectTable. The
atmVclCrossConnectIdentifier object of each endpoint points to the
atmVcCrossConnectTable row for the connection.

In the case of an inter-worked connection, the
atmVclCrossConnectIdentifier object is set to zero. Instead, the
frAtmIwfVclCrossConnectIdentifier object in the frAtmIwfVclEntry is
set to the index of the applicable FR/ATM IWF cross-connect table
row.

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Note that the frAtmIwfVclCrossConnectIdentifier object is defined not
in the ATM MIB but in Section 5 of this MIB. Specifically, the
object is defined as a column object in a table that AUGMENTs the ATM
MIB VCL table.

The ATM VCL cross-connect table (atmVcCrossConnectTable) does not
contain an entry for the inter-worked connection.

Note that the atmVclCrossConnectIdentifier and
frAtmIwfVclCrossConnectIdentifier objects are set by the system as a
side-effect of cross-connect establishment. Consequently, these
objects are read-only.

3.3.4. IF MIB

The ifIndex defined in the IF MIB [22] identifies the specific frame
relay and ATM endpoint interfaces. The values frAtmIwfConnAtmPort
and frAtmIwfConnFrPort are used in this MIB as components in the
index list for the frAtmIwfConnectionTable rows.

3.4. Point to Multipoint Considerations

This MIB supports IWF implementations providing point-to-multipoint
functionality. All rows of the cross-connect table indexed by the
same frAtmIwfConnIndex MUST utilize the same
frAtmIwfConnectionDescriptor value.

A group of cross-connect table entries indexed by the same
frAtmIwfConnIndex value MUST agree on which service the multipoint
operation is offered. Two cases are possible:

(1) Many frame relay PVCs cross-connected to one ATM PVC, or

(2) One frame relay PVC cross-connected to many ATM PVCs

3.5. Theory of Operation

3.5.1. Creation Process

Multiple steps are required to create a frame relay to ATM cross-
connection. First, rows must be created in the following tables:

(1) The Frame Relay Service MIB frPVCEndptTable

(2) The ATM MIB atmVclTable

(3) The FR/ATM Service IWF MIB frAtmIwfConnectionDescriptorTable

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(4) The FR/ATM Service IWF MIB frAtmIwfConnectionTable

Second, the newly created rows are cross-linked.

Finally, the administrative and operational status objects are set to
'up(1)'.

A step-by-step example is provided to illustrate the creation
process. In this example, the term "Manager" refers to a network
management system that issues SNMP protocol actions to an "Agent".
The agent is integrated with the system that implements the frame
relay to ATM service IWF. In this example, the following cross-
connection is created:

+-----------------------------------+
+---------+ | FR/ATM PVC Service IWF |
| Frame | | ------------------------------ | +-----------+
| Relay | +--------> frAtmIwfConnIndex K <--------+ | ATM |
|Endpoint | | | V | | | Endpoint |
| ------- | | | | | | | --------- |
| DLCI X | | | +------------+ | | |VPI.VCI Q.R|
| on |<-+ | | | +->| on |
|ifIndex Y| | V | | ifIndex S |
+---------+ |frAtmIwfConnectionDescriptorIndex L| +-----------+
+-----------------------------------+

Step 1 - Create the frame relay PVC endpoint

a) Manager requests creation of a new row in the frPVCEndptTable

b) Agent receives management request to create a row in
frPVCEndptTable for the frame relay side

c) A new row is created in frPVCEndptTable as follows:

- frPVCEndptConnectIdentifier initialized to zero

- frPVCEndptAtmIwfConnIndex initialized to zero

- remaining row objects initialized as needed for DLCI X on
ifIndex Y

Step 2 - Create the ATM PVC endpoint

a) Agent receives management request to create a row in atmVclTable
for the ATM side

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RFC 2955 FR to ATM Service Interworking MIB October 2000

b) A new row is created in atmVclTable and frAtmIwfVclTable (the
AUGMENT to the atmVclTable) as follows:

- atmVclCrossConnectIdentifier initialized to zero

- frAtmIwfVclCrossConnectIdentifier initialized to zero

- atmVclConnKind initialized to pvc(1)

- remaining row objects initialized as needed for VPI.VCI Q.R on
ifIndex S

Step 3 - Create the FR/ATM connection descriptor

a) If an existing connection descriptor is appropriate for the new
connection, go to Step 4 using the selected connection descriptor
index value L

b) Manager requests a new connection descriptor index value by
reading frAtmIwfConnectionDescriptorIndexNext from the agent

c) Agent receives GET request for
frAtmIwfConnectionDescriptorIndexNext and responds with the next
available value L

d) Manager requests a new connection descriptor row entry using the
value L as the index

e) Agent receives SET request to create the
frAtmIwfConnectionDescriptorTable row entry causes the system to
create a row in the table.

Step 4 - Create the FR/ATM cross-connect

a) Manager requests a new cross-connect index value by reading
frAtmIwfConnIndexNext from the agent

b) Agent receives GET request for frAtmIwfConnIndexNext and responds
with the next available value K

c) Manager requests a new cross-connect row entry using the value K
as the index

d) Agent receives SET request to create the frAtmIwfConnectionTable
row entry (note: the frame relay and ATM PVC endpoints MUST exist
and be specified as part of the index fields for the row
'K.S.Q.R.Y.X')

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RFC 2955 FR to ATM Service Interworking MIB October 2000

e) System creates a row in frAtmIwfConnectionTable for the following
indices:

- frAtmIwfConnIndex of K

- frAtmIwfConnAtmPort of S

- frAtmIwfConnVpi of Q

- frAtmIwfConnVci of R

- frAtmIwfConnFrPort of Y

- frAtmIwfConnDlci of X

- frAtmIwfConnectionDescriptor of L

Step 5 - The system sets the frame relay PVC endpoint and ATM VCL
endpoint to point to the FR/ATM cross-connect row (as a side-effect
of Step 4).

a) System sets frPVCEndptAtmIwfConnIndex to K

b) System sets frAtmIwfVclCrossConnectIdentifier to K

Step 6 - Manager signals activation by issuing a SET for the
frAtmIwfConnAdminStatus object using the value of 'up(1)'

Step 7 - Agent receives SET request for frAtmIwfConnAdminStatus and
executes internal system mechanisms to activate each PVC segment and
the IWF cross-connect. The successful activation permits the agent to
respond with 'up(1)' when a GET request is received for the following
fields:

- frAtmIwfConnAtm2FrOperStatus

- frAtmIwfConnFr2AtmOperStatus

- atmVclOperStatus (Note: there is no comparable FRS MIB object)

3.5.2. Destruction Process

Destruction of the frame relay to ATM cross-connection is initiated
by the network management system. The agent's processing of the
request stimulates implementation-specific system clean-up actions.
Following removal of the row in the cross-connection table, the
frAtmIwfVclCrossConnectIdentifier in the frAtmIwfVclTable (AUGMENT of

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RFC 2955 FR to ATM Service Interworking MIB October 2000

the ATM MIB endpoint table) and frPVCEndptAtmIwfConnIndex in the
Frame Relay Service MIB endpoint table are both re-initialized to
zero.

A step-by-step example is provided to illustrate the destruction
process.

Step 1 - Manager requests destruction of an existing row in the
frAtmIwfConnectionTable by setting frAtmIwfConnRowStatus to
destroy(6)

Step 2 - Agent receives the SET request and performs implementation-
specific system clean-up actions for the cross-connection row

Step 3 - System updates the relevant cross connect information for
the frame relay PVC endpoint by setting frPVCEndptAtmIwfConnIndex to
0

Step 4 - System updates the relevant cross connect information for
the ATM PVC endpoint as follows:

a) System sets frAtmIwfVclCrossConnectIdentifier to 0

b) System sets atmVclOperStatus to 'down(2)' (Note: there is no
comparable FRS MIB object)

Following the destruction of the FR/ATM cross-connection entry, the
manager MAY set the frPVCConnectRowStatus and/or atmVclRowStatus to
destroy(6) the associated endpoint entries.

3.5.3. Modification Process

At the discretion of the agent, a FR/ATM cross-connect may be
reconfigured by adding and/or deleting leafs to/from the IWF topology
as per the FR/ATM IWF cross-connect creation/destruction procedures.
Reconfiguration of traffic/service category parameter values requires
release of the FR/ATM IWF cross-connect before those parameter values
may be changed for individual frame relay or ATM endpoint segments.

4. Object Definitions

FR-ATM-PVC-SERVICE-IWF-MIB DEFINITIONS ::= BEGIN

IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
NOTIFICATION-TYPE,
mib-2, Integer32, Counter32 FROM SNMPv2-SMI

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RFC 2955 FR to ATM Service Interworking MIB October 2000

RowStatus, TimeStamp FROM SNMPv2-TC

MODULE-COMPLIANCE, OBJECT-GROUP,
NOTIFICATION-GROUP FROM SNMPv2-CONF

AtmVpIdentifier, AtmVcIdentifier FROM ATM-TC-MIB

atmVclEntry FROM ATM-MIB

InterfaceIndex FROM IF-MIB;

frAtmIwfMIB MODULE-IDENTITY
LAST-UPDATED "200009280000Z" -- September 28, 2000
ORGANIZATION "IETF Frame Relay Service MIB Working Group"
CONTACT-INFO
"WG Charter:
http://www.ietf.org/html.charters/frnetmib-charter
WG-email:
[email protected]
Subscribe:
[email protected]
Email Archive:
ftp://ftp.ietf.org/ietf-mail-archive/frnetmib

Chair: Andy Malis
Vivace Networks, Inc.
Email: [email protected]

WG editor: Kenneth Rehbehn
Megisto Systems, Inc.
Email: [email protected]

Co-author: Orly Nicklass
RAD Data Communications Ltd.
EMail: [email protected]

Co-author: George Mouradian
AT&T Labs
EMail: [email protected]"

DESCRIPTION
"The MIB module for monitoring and controlling the
Frame Relay/ATM PVC Service Interworking
Function."

--
-- Revision History
--

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REVISION "200009280000Z"
DESCRIPTION
"Published as RFC 2955"

::= { mib-2 86 }

--
-- Object Identifiers
--
frAtmIwfMIBObjects OBJECT IDENTIFIER
::= { frAtmIwfMIB 1 }

frAtmIwfTraps OBJECT IDENTIFIER
::= { frAtmIwfMIB 2 }
frAtmIwfTrapsPrefix OBJECT IDENTIFIER
::= { frAtmIwfTraps 0 }

frAtmIwfConformance OBJECT IDENTIFIER
::= { frAtmIwfMIB 3 }
frAtmIwfGroups OBJECT IDENTIFIER
::= { frAtmIwfConformance 1 }
frAtmIwfCompliances OBJECT IDENTIFIER
::= { frAtmIwfConformance 2 }

--
-- The FR/ATM PVC Service IWF Group
--
-- The Frame Relay/ATM PVC Service Interworking Function
-- Connection Table contains all connections utilizing
-- the interworking function.
--

frAtmIwfConnIndexNext OBJECT-TYPE
SYNTAX Integer32 (0..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains an appropriate value to be
used for frAtmIwfConnIndex when creating entries
in the frAtmIwfConnectionTable. The value 0
indicates that no unassigned entries are
available. To obtain the frAtmIwfConnIndexNext
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."
::= { frAtmIwfMIBObjects 1 }

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RFC 2955 FR to ATM Service Interworking MIB October 2000

frAtmIwfConnectionTable OBJECT-TYPE
SYNTAX SEQUENCE OF FrAtmIwfConnectionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table in which each row represents a Frame
Relay/ATM interworking connection."
::= { frAtmIwfMIBObjects 2 }

frAtmIwfConnectionEntry OBJECT-TYPE
SYNTAX FrAtmIwfConnectionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The FrAtmIwfConnectionEntry provides an entry for
an interworking connection between a frame relay
PVC and one or more ATM PVCs, or an ATM PVC and
one or more frame relay PVCs. A single frame
relay PVC connected to a single ATM PVC is
referred to as a `point-to-point' connection and
is represented by a single row in the FR/ATM IWF
Connection Table. The case of a single frame
relay PVC connected to multiple ATM PVCs (or
single ATM PVC connected to multiple frame relay
PVCs) is referred to as a `point-to-multipoint'
connection and is represented by multiple rows in
the FR/ATM IWF Connection Table.

The object frAtmIwfConnIndex uniquely identifies
each point-to-point or point-to-multipoint
connection. The manager obtains the
frAtmIwfConnIndex value by reading the
frAtmIwfConnIndexNext object.

After a frAtmIwfConnIndex is assigned for the
connection, the manager creates one or more rows
in the Cross Connect Table; one for each cross-
connection between the frame relay PVC and an ATM
PVC. In the case of `point-to-multipoint'
connections, all rows are indexed by the same
frAtmIwfConnIndex value and MUST refer to the same
frame relay PVC or ATM PVC respectively. An entry
can be created only when at least one pair of
frame relay and ATM PVCs exist.

A row can be established by one-step set-request
with all required parameter values and
frAtmIwfConnRowStatus set to createAndGo(4). The

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RFC 2955 FR to ATM Service Interworking MIB October 2000

Agent should perform all error checking as needed.
A pair of cross-connected PVCs, as identified by a
particular value of the indexes, is released by
setting frAtmIwfConnRowStatus to destroy(6). The
Agent may release all associated resources. The
manager may remove the related PVCs thereafter.
Indexes are persistent across reboots of the
system."
INDEX { frAtmIwfConnIndex,
frAtmIwfConnAtmPort,
frAtmIwfConnVpi,
frAtmIwfConnVci,
frAtmIwfConnFrPort,
frAtmIwfConnDlci
}
::= { frAtmIwfConnectionTable 1 }

FrAtmIwfConnectionEntry ::=
SEQUENCE {
frAtmIwfConnIndex Integer32,
frAtmIwfConnAtmPort InterfaceIndex,
frAtmIwfConnVpi AtmVpIdentifier,
frAtmIwfConnVci AtmVcIdentifier,
frAtmIwfConnFrPort InterfaceIndex,
frAtmIwfConnDlci Integer32,
frAtmIwfConnRowStatus RowStatus,
frAtmIwfConnAdminStatus INTEGER,
frAtmIwfConnAtm2FrOperStatus INTEGER,
frAtmIwfConnAtm2FrLastChange TimeStamp,
frAtmIwfConnFr2AtmOperStatus INTEGER,
frAtmIwfConnFr2AtmLastChange TimeStamp,
frAtmIwfConnectionDescriptor Integer32,
frAtmIwfConnFailedFrameTranslate Counter32,
frAtmIwfConnOverSizedFrames Counter32,
frAtmIwfConnFailedAal5PduTranslate Counter32,
frAtmIwfConnOverSizedSDUs Counter32,
frAtmIwfConnCrcErrors Counter32,
frAtmIwfConnSarTimeOuts Counter32
}

frAtmIwfConnIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique value for each point-to-point or point-
to-multipoint connection. The manager obtains the
frAtmIwfConnIndex value by reading the

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frAtmIwfConnIndexNext object. A point-to-
multipoint connection will be represented in the
frAtmIwfConnectionTable with multiple entries that
share the same frAtmIwfConnIndex value."
::= { frAtmIwfConnectionEntry 1 }

frAtmIwfConnAtmPort OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index in the ifTable that identifies the ATM
port for this interworking connection."
::= { frAtmIwfConnectionEntry 2 }

frAtmIwfConnVpi OBJECT-TYPE
SYNTAX AtmVpIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VPI of the ATM PVC end point for this
interworking connection."
::= { frAtmIwfConnectionEntry 3 }

frAtmIwfConnVci OBJECT-TYPE
SYNTAX AtmVcIdentifier
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The VCI of the ATM PVC end point for this
interworking
connection."
::= { frAtmIwfConnectionEntry 4 }

frAtmIwfConnFrPort OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index in the ifTable that identifies the
frame relay port for this interworking
connection."
::= { frAtmIwfConnectionEntry 5 }

frAtmIwfConnDlci OBJECT-TYPE
SYNTAX Integer32 (16..4194303)
MAX-ACCESS not-accessible
STATUS current

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RFC 2955 FR to ATM Service Interworking MIB October 2000

DESCRIPTION
"The DLCI that identifies the frame relay PVC end
point for this interworking connection."
::= { frAtmIwfConnectionEntry 6 }

frAtmIwfConnRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The table row may be created with
'createAndWait(5)' or 'createAndGo(4)'.
To activate a connection entry, a valid connection
descriptor MUST be established in the
frAtmIwfConnectionDescriptor object.

This object is set to 'destroy(6)' to delete the
table row. Before the table row is destroyed, the
OperStatus/AdminStatus of the corresponding
endpoints MUST be 'down(2)'. The deactivation of
the ATM endpoint MAY occur as a side-effect of
deleting the FR/ATM IWF cross-connection table
row. Otherwise, 'destroy(6)' operation MUST fail
(error code 'inconsistentValue')."
::= { frAtmIwfConnectionEntry 7 }

frAtmIwfConnAdminStatus OBJECT-TYPE
SYNTAX INTEGER { up(1), down(2) }
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The desired operational state for this FR/ATM
interworked connection.

up(1) = Activate the connection. Before the
activation can be completed, the
OperStatus/AdminStatus of the
corresponding endpoints MUST be
'up(1)'. The activation of the
corresponding endpoints MAY occur as
a side-effect of activating the
FR/ATM IWF cross-connection.

down(2) = Deactivate the connection. Before
the deactivation can be completed,
the atmVclAdminStatus of the
corresponding ATM endpoint MUST be
'down(2)'. The deactivation of the

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RFC 2955 FR to ATM Service Interworking MIB October 2000

ATM endpoint MAY occur as a
side-effect of deactivating the
FR/ATM IWF cross-connection."
::= { frAtmIwfConnectionEntry 8 }

frAtmIwfConnAtm2FrOperStatus OBJECT-TYPE
SYNTAX INTEGER { up(1), down(2) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current operational state of this
interworking connection in the ATM to frame
relay direction."
::= { frAtmIwfConnectionEntry 9 }

frAtmIwfConnAtm2FrLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time this
interworking connection entered its current
operational state in the ATM to FR direction. If
the current state was entered prior to the last
re-initialization of the local network management
subsystem, then this object contains a zero
value."
::= { frAtmIwfConnectionEntry 10 }

frAtmIwfConnFr2AtmOperStatus OBJECT-TYPE
SYNTAX INTEGER { up(1), down(2) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current operational state of this
interworking connection in the frame relay
to ATM direction."
::= { frAtmIwfConnectionEntry 11 }

frAtmIwfConnFr2AtmLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time this
interworking connection entered its current
operational state in the FR to ATM direction. If
the current state was entered prior to the last

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RFC 2955 FR to ATM Service Interworking MIB October 2000

re-initialization of the local network management
subsystem, then this object contains a zero
value."
::= { frAtmIwfConnectionEntry 12 }

frAtmIwfConnectionDescriptor OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The value represents a pointer to the relevant
descriptor in the IWF descriptor table. An
attempt to set this value to an inactive or non-
existent row in the Connection Descriptor Table
MUST fail (error code 'inconsistentValue')."
::= { frAtmIwfConnectionEntry 13 }

frAtmIwfConnFailedFrameTranslate OBJECT-TYPE
SYNTAX Counter32
UNITS "Frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of frames discarded
by the IWF because, while operating in Translation
Mode, the IWF is unable to decode the incoming
frame payload header according to the mapping
rules. (i.e., payload header not recognized by the
IWF).

Frame relay frames are received in the frame relay
to ATM direction of the PVC.

When operating in Transparent Mode, the IWF MUST
return noSuchInstance."
REFERENCE
"FRF.8 [17], Section 5.3.1"
::= { frAtmIwfConnectionEntry 14 }

frAtmIwfConnOverSizedFrames OBJECT-TYPE
SYNTAX Counter32
UNITS "Frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Count of frames discarded by the IWF because the
frame is too large to be processed by the AAL5
segmentation procedure. Specifically, the frame

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RFC 2955 FR to ATM Service Interworking MIB October 2000

does not conform to the size specified in the
atmVccAal5CpcsTransmitSduSize object associated
with the atmVclEntry at the ATM endpoint.
Frame relay frames are received in the frame relay
to ATM direction of the PVC."
REFERENCE
"ATM MIB [21], atmVclTable
FRF.8 [17], 5.3.1.4"
::= { frAtmIwfConnectionEntry 15 }

frAtmIwfConnFailedAal5PduTranslate OBJECT-TYPE
SYNTAX Counter32
UNITS "PDUs"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This attribute counts the number of AAL5 PDUs
discarded by the IWF because, while operating in
Translation Mode, the IWF is unable to decode the
incoming AAL5 PDU payload header according to the
mapping rules. (i.e., payload header not
recognized by the IWF).

AAL5 PDUs are received in the ATM to frame relay
direction of the PVC.

When operating in Transparent Mode, the IWF MUST
return noSuchInstance."
REFERENCE
"FRF.8 [17], Section 5.3.1"
::= { frAtmIwfConnectionEntry 16 }

frAtmIwfConnOverSizedSDUs OBJECT-TYPE
SYNTAX Counter32
UNITS "SDUs"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Count of AAL5 SDUs discarded by the IWF because
the SDU is too large to be forwarded on the frame
relay segment of the connection. Specifically,
the frame does not conform to the size specified
in the frLportFragSize object of the FRS MIB [19].

AAL5 PDUs are received in the ATM to frame relay
direction of the PVC."
REFERENCE
"FRS MIB [19], frLportTable

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RFC 2955 FR to ATM Service Interworking MIB October 2000

FRF.8 [17], 5.3.1.4"
::= { frAtmIwfConnectionEntry 17 }

frAtmIwfConnCrcErrors OBJECT-TYPE
SYNTAX Counter32
UNITS "PDUs"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of AAL5 CPCS PDUs received with CRC-32
errors on this AAL5 VCC at the IWF.

AAL5 PDUs are received in the ATM to frame relay
direction of the PVC."
REFERENCE
"ATM MIB [21], atmVclTable"
::= { frAtmIwfConnectionEntry 18 }

frAtmIwfConnSarTimeOuts OBJECT-TYPE
SYNTAX Counter32
UNITS "PDUs"
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
IWF 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.

AAL5 PDUs are received in the ATM to frame relay
direction of the PVC."
REFERENCE
"ATM MIB [21], atmVclTable"
::= { frAtmIwfConnectionEntry 19 }

--
-- The FR/ATM PVC Service IWF Connection Descriptor Group
--
-- The Frame Relay/ATM PVC Service Interworking Function
-- Connection Descriptor table. A descriptor provides the
-- attributes for a type of interworked connection.
--

frAtmIwfConnectionDescriptorIndexNext OBJECT-TYPE
SYNTAX Integer32 (0..2147483647)
MAX-ACCESS read-only

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RFC 2955 FR to ATM Service Interworking MIB October 2000

STATUS current
DESCRIPTION
"This object contains an appropriate value to be
used for frAtmIwfConnectionDescriptorIndex when
creating entries in the
frAtmIwfConnectionDescriptorTable. The value 0
indicates that no unassigned entries are
available. To obtain the
frAtmIwfConnectionDescriptorIndexNext 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."
::= { frAtmIwfMIBObjects 3 }

frAtmIwfConnectionDescriptorTable OBJECT-TYPE
SYNTAX SEQUENCE OF FrAtmIwfConnectionDescriptorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table in which each row represents a descriptor
for one type of Frame Relay/ATM interworking
connection. A descriptor may be assigned to zero
or more FR/ATM PVC service IWF connections."
::= { frAtmIwfMIBObjects 4 }

frAtmIwfConnectionDescriptorEntry OBJECT-TYPE
SYNTAX FrAtmIwfConnectionDescriptorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry for a descriptor in an interworking
connection between a frame relay PVC and an ATM
PVC."
INDEX { frAtmIwfConnectionDescriptorIndex }
::= { frAtmIwfConnectionDescriptorTable 1 }

FrAtmIwfConnectionDescriptorEntry ::=
SEQUENCE {
frAtmIwfConnectionDescriptorIndex Integer32,
frAtmIwfConnDescriptorRowStatus RowStatus,
frAtmIwfConnDeToClpMappingMode INTEGER,
frAtmIwfConnClpToDeMappingMode INTEGER,
frAtmIwfConnCongestionMappingMode INTEGER,
frAtmIwfConnEncapsulationMappingMode INTEGER,
frAtmIwfConnEncapsulationMappings BITS,
frAtmIwfConnFragAndReassEnabled INTEGER,

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RFC 2955 FR to ATM Service Interworking MIB October 2000

frAtmIwfConnArpTranslationEnabled INTEGER
}

frAtmIwfConnectionDescriptorIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique value to identify a descriptor in the
table "
::= { frAtmIwfConnectionDescriptorEntry 1 }

frAtmIwfConnDescriptorRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this table row. This object is
used to create or delete an entry in the
descriptor table.

Creation of the row requires a row index (see
frAtmIwfConnectionDescriptorIndexNext). If not
explicitly set or in existence, all other columns
of the row will be created and initialized to the
default value. During creation, this object MAY
be set to 'createAndGo(4)' or 'createAndWait(5)'.
The object MUST contain the value 'active(1)'
before any connection table entry references the
row.

To destroy a row in this table, this object is set
to the 'destroy(6)' action. Row destruction MUST
fail (error code 'inconsistentValue') if any
connection references the row."
::= { frAtmIwfConnectionDescriptorEntry 2 }

frAtmIwfConnDeToClpMappingMode OBJECT-TYPE
SYNTAX INTEGER {
mode1(1),
mode2Const0(2),
mode2Const1(3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object describes which mode of translation
is in use for loss priority mapping in the frame

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RFC 2955 FR to ATM Service Interworking MIB October 2000

relay to ATM direction.

mode1(1) = the DE field in the Q.922 core
frame shall be mapped to the ATM
CLP field of every cell
generated by the segmentation
process of the AAL5 PDU
containing the information of
that frame.

mode2Contst0(2) = the ATM CLP field of every cell
generated by the segmentation
process of the AAL5 PDU
containing the information of
that frame shall be set to
constant 0.

mode2Contst1(3) = the ATM CLP field of every cell
generated by the segmentation
process of the AAL5 PDU
containing the information of
that frame shall be set to
constant 1."
REFERENCE
"FRF.8 [17], Section 4.2.1"
DEFVAL { mode1 }
::= { frAtmIwfConnectionDescriptorEntry 3 }

frAtmIwfConnClpToDeMappingMode OBJECT-TYPE
SYNTAX INTEGER {
mode1(1),
mode2Const0(2),
mode2Const1(3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object describes which mode of translation
is in use for loss priority mapping in the ATM to
frame relay direction.

mode1(1) = if one or more cells in a frame
has its CLP field set, the DE
field of the Q.922 core frame
should be set.

mode2Const0(2) = the DE field of the Q.922 core
frame should be set to the

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RFC 2955 FR to ATM Service Interworking MIB October 2000

constant 0.

mode2Const1(3) = the DE field of the Q.922 core
frame should be set to the
constant 1."
REFERENCE
"FRF.8 [17], Section 4.2.2"
DEFVAL { mode1 }
::= { frAtmIwfConnectionDescriptorEntry 4 }

frAtmIwfConnCongestionMappingMode OBJECT-TYPE
SYNTAX INTEGER {
mode1(1),
mode2(2)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object describes which mode of translation
is in use for forward congestion indication
mapping in the frame relay to ATM direction.

mode1(1) = The FECN field in the Q.922 core frame
shall be mapped to the ATM EFCI field
of every cell generated by the
segmentation process of the AAL5 PDU
containing the information of that
frame.

mode2(2) = The FECN field in the Q.922 core frame
shall not be mapped to the ATM EFCI
field of cells generated by the
segmentation process of the AAL5 PDU
containing the information of that
frame. The EFCI field is always set to
'congestion not experienced'.

In both of the modes above, if there is congestion
in the forward direction in the ATM layer within
the IWF, then the IWF can set the EFCI field to
'congestion experienced'."
REFERENCE
"FRF.8 [17], Section 4.3.1.1"
DEFVAL { mode1 }
::= { frAtmIwfConnectionDescriptorEntry 5 }

frAtmIwfConnEncapsulationMappingMode OBJECT-TYPE
SYNTAX INTEGER {

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RFC 2955 FR to ATM Service Interworking MIB October 2000

transparentMode(1),
translationMode(2),
translationModeAll(3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object indicates whether the mapping of
upper layer protocol encapsulation is enabled on
this interworking connection.

transparentMode(1) = Forward the encapsulations
unaltered.

translationMode(2) = Perform mapping between the
two encapsulations due to the
incompatibilities of the two
methods. Mapping is provided
for a subset of the potential
encapsulations as itemized in
frAtmIwfConnEncapsulationMapp
ings.

translationModeAll(3) = Perform mapping between
the two encapsulations due to
the incompatibilities of the
two methods. All
encapsulations are
translated."
REFERENCE
"FRF.8 [17], Section 5.3"
DEFVAL { transparentMode }
::= { frAtmIwfConnectionDescriptorEntry 6 }

frAtmIwfConnEncapsulationMappings OBJECT-TYPE
SYNTAX BITS {
none (0),
bridgedPdus(1),
bridged802dot6(2),
bPdus(3),
routedIp(4),
routedOsi(5),
otherRouted(6),
x25Iso8202(7),
q933q2931(8) }
MAX-ACCESS read-create
STATUS current
DESCRIPTION

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RFC 2955 FR to ATM Service Interworking MIB October 2000

"If upper layer protocol encapsulation mapping is
enabled on this interworking connection, then this
attribute enumerates which of the encapsulation
mappings are supported.

none(0) = Transparent mode operation
bridgedPdus(1) = PID: 0x00-01,-07,-02 or -08
bridged802dot6(2) = PID: 0x00-0B
bPdus(3) = PID: 0x00-0E or -0F
routedIp(4) = NLPID: OxCC
routedOsi(5) = NLPID: Ox81, 0x82 or 0x83
otherRouted(6) = Other routed protocols
x25Iso8202(7) = X25
q933q2931(8) = Q.933 and Q.2931"
REFERENCE
"FRF.8 [17], Section 5.3.1"
DEFVAL { { none } }
::= { frAtmIwfConnectionDescriptorEntry 7 }

frAtmIwfConnFragAndReassEnabled OBJECT-TYPE
SYNTAX INTEGER { enabled(1), disabled(2)}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The attribute indicates whether fragmentation and
reassembly is enabled for this connection."
REFERENCE
"FRF.8 [17], Section 5.3.1.4"
DEFVAL { disabled }
::= { frAtmIwfConnectionDescriptorEntry 8 }

frAtmIwfConnArpTranslationEnabled OBJECT-TYPE
SYNTAX INTEGER { enabled(1), disabled(2)}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The attribute indicates whether ARP translation
is enabled for this connection."
REFERENCE
"FRF.8 [17], Section 5.4"
DEFVAL { disabled }
::= { frAtmIwfConnectionDescriptorEntry 9 }

--
-- Augmentation of ATM MIB VCL Endpoint Table (atmVclTable)
--
frAtmIwfVclTable OBJECT-TYPE
SYNTAX SEQUENCE OF FrAtmIwfVclEntry

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RFC 2955 FR to ATM Service Interworking MIB October 2000

MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The FR/ATM IWF VCL Table augments the ATM MIB VCL
Endpoint table."
::= { frAtmIwfMIBObjects 5 }

frAtmIwfVclEntry OBJECT-TYPE
SYNTAX FrAtmIwfVclEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Entries in this table are created only by the
agent. One entry exists for each ATM VCL managed
by the agent."
AUGMENTS { atmVclEntry }
::= { frAtmIwfVclTable 1 }

FrAtmIwfVclEntry ::= SEQUENCE {
frAtmIwfVclCrossConnectIdentifier Integer32
}

frAtmIwfVclCrossConnectIdentifier OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains the index value of the
FR/ATM cross-connect table entry used to link the
ATM VCL with a frame relay PVC.

Each row of the atmVclTable that is not cross-
connected with a frame relay PVC MUST return the
value zero when this object is read.

In the case of (frame relay) point to (ATM)
multipoint, multiple ATM VCLs will have the same
value of this object, and all their cross-
connections are identified by entries that are
indexed by the same value of
frAtmIwfVclCrossConnectIdentifier in the
frAtmIwfConnectionTable of this MIB module.

The value of this object is initialized by the
agent after the associated entries in the
frAtmIwfConnectionTable have been created."
::= { frAtmIwfVclEntry 1 }

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RFC 2955 FR to ATM Service Interworking MIB October 2000

--
-- Frame Relay/ATM PVC Service Interworking NOTIFICATION
--

frAtmIwfConnStatusChange NOTIFICATION-TYPE
OBJECTS { frAtmIwfConnAdminStatus,
frAtmIwfConnAtm2FrOperStatus,
frAtmIwfConnFr2AtmOperStatus
}
STATUS current
DESCRIPTION
"An indication that the status of this
interworking connection has changed."
::= { frAtmIwfTrapsPrefix 1 }

--
-- Conformance Information
--

--
-- Compliance Statement For Equipment
--

frAtmIwfEquipmentCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for equipment that
implements the FR/ATM Interworking MIB."

MODULE -- this module
MANDATORY-GROUPS { frAtmIwfBasicGroup,
frAtmIwfConnectionDescriptorGroup,
frAtmIwfAtmVclTableAugmentGroup,
frAtmIwfNotificationsGroup }

OBJECT frAtmIwfConnDeToClpMappingMode
SYNTAX INTEGER { mode1(1) }
DESCRIPTION
"Only support for Mode 1 is REQUIRED."

OBJECT frAtmIwfConnClpToDeMappingMode
SYNTAX INTEGER { mode1(1) }
DESCRIPTION
"Only support for Mode 1 is REQUIRED."

OBJECT frAtmIwfConnCongestionMappingMode
SYNTAX INTEGER { mode1(1) }
DESCRIPTION

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RFC 2955 FR to ATM Service Interworking MIB October 2000

"Only support for Mode 1 is REQUIRED."

OBJECT frAtmIwfConnEncapsulationMappingMode
SYNTAX INTEGER { transparentMode(1) }
DESCRIPTION
"Support for Translation Mode is OPTIONAL."

OBJECT frAtmIwfConnEncapsulationMappings
SYNTAX BITS { none(0) }
DESCRIPTION
"The IWF may provide one, some or none of the
encapsulation translations defined in section
5.3.1 of FRF.8 [17]."

OBJECT frAtmIwfConnFragAndReassEnabled
SYNTAX INTEGER { disabled(2) }
DESCRIPTION
"Only support for Mode 1 is REQUIRED."

OBJECT frAtmIwfConnArpTranslationEnabled
SYNTAX INTEGER { disabled(2) }
DESCRIPTION
"Support for ARP Translation is NOT REQUIRED."

::= { frAtmIwfCompliances 1 }

--
-- Compliance Statement For Service (CNM Interface)
--

frAtmIwfServiceCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for a CNM interface that
implements the FR/ATM Interworking MIB."

MODULE -- this module
MANDATORY-GROUPS { frAtmIwfBasicGroup,
frAtmIwfConnectionDescriptorGroup,
frAtmIwfAtmVclTableAugmentGroup,
frAtmIwfNotificationsGroup }

--
-- Exceptions for each object type implemented for a
-- CNM view of the FR/ATM Interworking MIB
--
OBJECT frAtmIwfConnAdminStatus
MIN-ACCESS read-only

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RFC 2955 FR to ATM Service Interworking MIB October 2000

DESCRIPTION
"Write access is not REQUIRED."

OBJECT frAtmIwfConnDeToClpMappingMode
SYNTAX INTEGER { mode1(1) }
MIN-ACCESS read-only
DESCRIPTION
"Support for Mode 1 is REQUIRED. Other modes are
OPTIONAL. Write access is NOT REQUIRED."

OBJECT frAtmIwfConnClpToDeMappingMode
SYNTAX INTEGER { mode1(1) }
MIN-ACCESS read-only
DESCRIPTION
"Support for Mode 1 is REQUIRED. Other modes are
OPTIONAL. Write access is NOT REQUIRED."

OBJECT frAtmIwfConnCongestionMappingMode
SYNTAX INTEGER { mode1(1) }
MIN-ACCESS read-only
DESCRIPTION
"Support for Mode 1 is REQUIRED. Other modes are
OPTIONAL. Write access is NOT REQUIRED."

OBJECT frAtmIwfConnEncapsulationMappingMode
SYNTAX INTEGER { transparentMode(1) }
MIN-ACCESS read-only
DESCRIPTION
"Support for Transparent Mode is REQUIRED.
Translation Mode is OPTIONAL. Write access is not
required."

OBJECT frAtmIwfConnEncapsulationMappings
SYNTAX BITS { none(0) }
MIN-ACCESS read-only
DESCRIPTION
"The IWF may provide one, some or none of the
encapsulation translations defined in section
5.3.1 of FRF.8 [17]. Write access is not
required."

OBJECT frAtmIwfConnFragAndReassEnabled
SYNTAX INTEGER { disabled(2) }
MIN-ACCESS read-only
DESCRIPTION
"Support for Fragmentation and Reassembly is NOT
REQUIRED. Write access is not required."

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RFC 2955 FR to ATM Service Interworking MIB October 2000

OBJECT frAtmIwfConnArpTranslationEnabled
SYNTAX INTEGER { disabled(2) }
MIN-ACCESS read-only
DESCRIPTION
"Support for ARP Translation is not required.
Write access is not required."

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

::= { frAtmIwfCompliances 2 }

--
-- Units of Conformance
--

--
-- Basic FR/ATM IWF PVC Connection Group
--
frAtmIwfBasicGroup OBJECT-GROUP
OBJECTS { frAtmIwfConnIndexNext,
frAtmIwfConnAdminStatus,
frAtmIwfConnAtm2FrOperStatus,
frAtmIwfConnAtm2FrLastChange,
frAtmIwfConnFr2AtmOperStatus,
frAtmIwfConnFr2AtmLastChange,
frAtmIwfConnectionDescriptor,
frAtmIwfConnFailedFrameTranslate,
frAtmIwfConnOverSizedFrames,
frAtmIwfConnFailedAal5PduTranslate,
frAtmIwfConnOverSizedSDUs,
frAtmIwfConnCrcErrors,
frAtmIwfConnSarTimeOuts,
frAtmIwfConnRowStatus }
STATUS current
DESCRIPTION
"The collection of basic objects for configuration
and control of FR/ATM interworking connections."
::= { frAtmIwfGroups 1 }

--
-- FR/ATM IWF PVC Connection Descriptor Group
--

frAtmIwfConnectionDescriptorGroup OBJECT-GROUP
OBJECTS {

Rehbehn, et al. Standards Track [Page 32]

RFC 2955 FR to ATM Service Interworking MIB October 2000

frAtmIwfConnectionDescriptorIndexNext,
frAtmIwfConnDeToClpMappingMode,
frAtmIwfConnClpToDeMappingMode,
frAtmIwfConnCongestionMappingMode,
frAtmIwfConnEncapsulationMappingMode,
frAtmIwfConnEncapsulationMappings,
frAtmIwfConnFragAndReassEnabled,
frAtmIwfConnArpTranslationEnabled,
frAtmIwfConnDescriptorRowStatus
}
STATUS current
DESCRIPTION
"The collection of basic objects for specification
of FR/ATM interworking connection descriptors."
::= { frAtmIwfGroups 2 }

--
-- ATM MIB VCL Endpoint Table Augmentation Group
--

frAtmIwfAtmVclTableAugmentGroup OBJECT-GROUP
OBJECTS {
frAtmIwfVclCrossConnectIdentifier
}
STATUS current
DESCRIPTION
"The ATM MIB VCL Endpoint Table AUGMENT object
contained in the FR/ATM PVC Service Interworking
MIB."
::= { frAtmIwfGroups 3 }

--
-- Notification Group
--

frAtmIwfNotificationsGroup NOTIFICATION-GROUP
NOTIFICATIONS { frAtmIwfConnStatusChange }
STATUS current
DESCRIPTION
"The notification for FR/ATM interworking status
change."
::= { frAtmIwfGroups 4 }
END

Rehbehn, et al. Standards Track [Page 33]

RFC 2955 FR to ATM Service Interworking MIB October 2000

8. Acknowledgments

This document was produced by the Frame Relay Service MIB Working
Group.

The Editors thank Bert Wijnen, Kaj Tesink, Keith McCloghrie, and
David Perkins for providing many helpful comments and suggestions.

9. References

[1] Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture for
Describing SNMP Management Frameworks", RFC 2571, April 1999.

[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] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
M. and S. Waldbusser, "Structure of Management Information
Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.

[6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58,
RFC 2579, April 1999.

[7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
M. and S. Waldbusser, "Conformance Statements for SMIv2", STD
58, RFC 2580, April 1999.

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

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

[10] 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.

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RFC 2955 FR to ATM Service Interworking MIB October 2000

[11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message
Processing and Dispatching for the Simple Network Management
Protocol (SNMP)", RFC 2572, April 1999.

[12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM)
for version 3 of the Simple Network Management Protocol
(SNMPv3)", RFC 2574, April 1999.

[13] 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, "SNMPv3 Applications", RFC
2573, April 1999.

[15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access
Control Model (VACM) for the Simple Network Management Protocol
(SNMP)", RFC 2575, April 1999.

[16] Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction
to Version 3 of the Internet-standard Network Management
Framework", RFC 2570, April 1999.

[17] Frame Relay/ATM PVC Service Interworking Implementation
Agreement, Frame Relay Forum, Document Number FRF.8.1, March,
2000.

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

[19] Rehbehn, K. and D. Fowler, "Definitions of Managed Objects for
Frame Relay Service", RFC 2954, October 2000.

[20] Frame Relay/ATM PVC Network Interworking Implementation
Agreement, Frame Relay Forum, Document Number FRF.5, December
20, 1994.

[21] Tesink, K., "Definitions of Managed Objects for ATM Management",
RFC 2515, February 1999.

[22] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB",
RFC 2863, June 2000.

[23] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.

Rehbehn, et al. Standards Track [Page 35]

RFC 2955 FR to ATM Service Interworking MIB October 2000

[24] Brown, C. and F. Baker, "Management Information Base for Frame
Relay DTEs Using SMIv2", RFC 2115, September 1997.

10. 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.

No managed objects in this MIB contain sensitive information.

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 2574 [12] and the View-based
Access Control Model RFC 2575 [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.

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RFC 2955 FR to ATM Service Interworking MIB October 2000

11. Authors' Addresses

Kenneth Rehbehn
Megisto Systems, Inc.
20251 Century Boulevard
Germantown, MD, USA 20874

Phone: +1 (301) 515-3672
EMail: [email protected]

Orly Nicklass
RAD Data Communications, Ltd.
12 Hanechoshet St.
Tel Aviv 69710
Israel

Phone: +972 (3) 6459588
EMail: [email protected]

George Mouradian
AT&T Labs, Room 1G-325
101 Crawfords Corner Road
Holmdel, NJ USA 07733

Phone: +1 908 949 7671
EMail: [email protected]

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RFC 2955 FR to ATM Service Interworking MIB October 2000

12. Intellectual Property Rights

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.

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RFC 2955 FR to ATM Service Interworking MIB October 2000

13. Full Copyright Statement

Copyright (C) The Internet Society (2000). 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
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included on all such copies and derivative works. However, this
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The limited permissions granted above are perpetual and will not be
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This document and the information contained herein is provided on an
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Acknowledgement

Funding for the RFC Editor function is currently provided by the
Internet Society.

Rehbehn, et al. Standards Track [Page 39]