Internet Engineering Task Force (IETF) D. Fedyk

Internet Engineering Task Force (IETF) D. Fedyk
Request for Comments: 9349 E. Kinzie
Category: Standards Track LabN Consulting, L.L.C.
ISSN: 2070-1721 January 2023

Definitions of Managed Objects for IP Traffic Flow Security

Abstract

This document describes managed objects for the management of IP
Traffic Flow Security additions to Internet Key Exchange Protocol
Version 2 (IKEv2) and IPsec. This document provides a read-only
version of the objects defined in the YANG module for the same
purpose, which is in "A YANG Data Model for IP Traffic Flow Security"
(RFC 9348).

Status of This Memo

This is an Internet Standards Track document.

This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.

Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc9349.

Copyright Notice

Copyright (c) 2023 IETF Trust and the persons identified as the
document authors. All rights reserved.

This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Revised BSD License text as described in Section 4.e of the
Trust Legal Provisions and are provided without warranty as described
in the Revised BSD License.

Table of Contents

1. Introduction
1.1. The Internet-Standard Management Framework
2. Terminology and Concepts
3. Overview
4. Management Objects
4.1. MIB Tree
4.2. SNMP
5. IANA Considerations
6. Security Considerations
7. References
7.1. Normative References
7.2. Informative References
Acknowledgements
Authors' Addresses

1. Introduction

This document defines a Management Information Base (MIB) module for
use with network management protocols in the Internet community. IP
Traffic Flow Security (IP-TFS) extensions, as defined in [RFC9347],
are enhancements to an IPsec tunnel Security Association (SA) to
provide improved traffic confidentiality.

The objects defined here are the same as [RFC9348], with the
exception that only operational or state data is supported. By
making operational data accessible via SNMP, existing network
management systems can monitor IP-TFS. This data is listed in the
MIB tree in Section 4.1. This module uses the YANG data model as a
reference point for managed objects. Note that an IETF MIB model for
IPsec was never standardized; however, the structures here could be
adapted to existing proprietary MIB implementations where SNMP is
used to manage networks.

1.1. The Internet-Standard Management Framework

For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to Section 7 of
[RFC3410].

Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
[RFC2578], STD 58, [RFC2579] and STD 58, [RFC2580].

2. Terminology and Concepts

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.

3. Overview

This document defines the MIB for access to operational parameters of
IP Traffic Flow Security (IP-TFS). IP-TFS, defined in [RFC9347],
configures a Security Association for tunnel mode IPsec with
characteristics that improve traffic confidentiality and reduce
bandwidth efficiency loss.

This document is based on the concepts and management model defined
in [RFC9348]. This document assumes familiarity with the IPsec
concepts described in [RFC4301], IP-TFS as described in [RFC9347],
and the IP-TFS management model described in [RFC9348].

This document specifies an extensible operational model for IP-TFS.
It reuses the management model defined in [RFC9348]. It allows SNMP
systems to read operational objects (which include configured
objects) from IP-TFS.

4. Management Objects

4.1. MIB Tree

The following is the MIB registration tree diagram for the IP-TFS
extensions.

# IP-TRAFFIC-FLOW-SECURITY-MIB registration tree

--iptfsMIB(1.3.6.1.2.1.500)
+--iptfsMIBObjects(1)
| +--iptfsGroup(1)
| | +--iptfsConfigTable(1)
| | +--iptfsConfigTableEntry(1) [iptfsConfigSaIndex]
| | |
| | +-- --- Integer32 iptfsConfigSaIndex(1)
| | +-- r-n TruthValue congestionControl(2)
| | +-- r-n TruthValue usePathMtuDiscovery(3)
| | +-- r-n UnsignedShort outerPacketSize(4)
| | +-- r-n CounterBasedGauge64 l2FixedRate(5)
| | +-- r-n CounterBasedGauge64 l3FixedRate(6)
| | +-- r-n TruthValue dontFragment(7)
| | +-- r-n NanoSeconds maxAggregationTime(8)
| | +-- r-n UnsignedShort windowSize(9)
| | +-- r-n TruthValue sendImmediately(10)
| | +-- r-n NanoSeconds lostPacketTimerInterval(11)
| +--ipsecStatsGroup(2)
| | +--ipsecStatsTable(1)
| | +--ipsecStatsTableEntry(1) [ipsecSaIndex]
| | +-- --- Integer32 ipsecSaIndex(1)
| | +-- r-n Counter64 txPkts(2)
| | +-- r-n Counter64 txOctets(3)
| | +-- r-n Counter64 txDropPkts(4)
| | +-- r-n Counter64 rxPkts(5)
| | +-- r-n Counter64 rxOctets(6)
| | +-- r-n Counter64 rxDropPkts(7)
| +--iptfsInnerStatsGroup(3)
| | +--iptfsInnerStatsTable(1)
| | +--iptfsInnerStatsTableEntry(1) [iptfsInnerSaIndex]
| | +-- --- Integer32 iptfsInnerSaIndex(1)
| | +-- r-n Counter64 txInnerPkts(2)
| | +-- r-n Counter64 txInnerOctets(3)
| | +-- r-n Counter64 rxInnerPkts(4)
| | +-- r-n Counter64 rxInnerOctets(5)
| | +-- r-n Counter64 rxIncompleteInnerPkts(6)
| +--iptfsOuterStatsGroup(4)
| +--iptfsOuterStatsTable(1)
| +--iptfsOuterStatsTableEntry(1) [iptfsOuterSaIndex]
| +-- --- Integer32 iptfsOuterSaIndex(1)
| +-- r-n Counter64 txExtraPadPkts(2)
| +-- r-n Counter64 txExtraPadOctets(3)
| +-- r-n Counter64 txAllPadPkts(4)
| +-- r-n Counter64 txAllPadOctets(5)
| +-- r-n Counter64 rxExtraPadPkts(6)
| +-- r-n Counter64 rxExtraPadOctets(7)
| +-- r-n Counter64 rxAllPadPkts(8)
| +-- r-n Counter64 rxAllPadOctets(9)
| +-- r-n Counter64 rxErroredPkts(10)
| +-- r-n Counter64 rxMissedPkts(11)
+--iptfsMIBConformance(2)
+--iptfsMIBConformances(1)
| +--iptfsMIBCompliance(1)
+--iptfsMIBGroups(2)
+--iptfsMIBConfGroup(1)
+--ipsecStatsConfGroup(2)
+--iptfsInnerStatsConfGroup(3)
+--iptfsOuterStatsConfGroup(4)

4.2. SNMP

The following is the MIB for IP-TFS. The congestion control
algorithm in [RFC5348] is referenced in the MIB text.

<CODE BEGINS> file "iptfs-mib.mib"
-- *----------------------------------------------------------------
-- * IP-TRAFFIC-FLOW-SECURITY-MIB Module
-- *----------------------------------------------------------------

IP-TRAFFIC-FLOW-SECURITY-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
Integer32, Unsigned32, Counter64, mib-2
FROM SNMPv2-SMI
CounterBasedGauge64
FROM HCNUM-TC
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
TEXTUAL-CONVENTION,
TruthValue
FROM SNMPv2-TC;

iptfsMIB MODULE-IDENTITY
LAST-UPDATED "202301310000Z"
ORGANIZATION "IETF IPsecme Working Group"
CONTACT-INFO
"
Author: Don Fedyk
<mailto:[email protected]>

Author: Eric Kinzie
<mailto:[email protected]>"

DESCRIPTION
"This module defines the configuration and operational
state for managing the IP Traffic Flow Security
functionality (RFC 9349).

Copyright (c) 2023 IETF Trust and the persons identified
as authors of the code. All rights reserved.

Redistribution and use in source and binary forms,
with or without modification, is permitted pursuant
to, and subject to the license terms contained in,
the Simplified BSD License set forth in Section 4.c
of the IETF Trust's Legal Provisions Relating to IETF
Documents (https://trustee.ietf.org/license-info).

This version of this SNMP MIB module is part of RFC 9349;
see the RFC itself for full legal notices."

REVISION "202301310000Z"
DESCRIPTION
"Initial revision. Derived from the IP-TFS YANG
Data Model."
::= { mib-2 246}
--
-- Textual Conventions
--

UnsignedShort ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION "xs:unsignedShort"
SYNTAX Unsigned32 (0 .. 65535)

NanoSeconds ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d-6"
STATUS current
DESCRIPTION
"Represents the time unit value in nanoseconds."
SYNTAX Integer32

-- Objects, Notifications & Conformances

iptfsMIBObjects OBJECT IDENTIFIER
::= { iptfsMIB 1 }
iptfsMIBConformance OBJECT IDENTIFIER
::= { iptfsMIB 2}

--
-- IP-TFS MIB Object Groups
--
iptfsGroup OBJECT IDENTIFIER
::= { iptfsMIBObjects 1 }

ipsecStatsGroup OBJECT IDENTIFIER
::= { iptfsMIBObjects 2 }

iptfsInnerStatsGroup OBJECT IDENTIFIER
::= { iptfsMIBObjects 3 }

iptfsOuterStatsGroup OBJECT IDENTIFIER
::= { iptfsMIBObjects 4 }

iptfsConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF IptfsConfigTableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The table containing configuration information for
IP-TFS."
::= { iptfsGroup 1 }

iptfsConfigTableEntry OBJECT-TYPE
SYNTAX IptfsConfigTableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) containing the information on
a particular IP-TFS SA."
INDEX { iptfsConfigSaIndex }
::= { iptfsConfigTable 1 }

IptfsConfigTableEntry ::= SEQUENCE {
iptfsConfigSaIndex Integer32,

-- identifier information
congestionControl TruthValue,
usePathMtuDiscovery TruthValue,
outerPacketSize UnsignedShort,
l2FixedRate CounterBasedGauge64,
l3FixedRate CounterBasedGauge64,
dontFragment TruthValue,
maxAggregationTime NanoSeconds,
windowSize UnsignedShort,
sendImmediately TruthValue,
lostPacketTimerInterval NanoSeconds
}

iptfsConfigSaIndex OBJECT-TYPE
SYNTAX Integer32 (1..16777215)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique value, greater than zero, for each SA.
It is recommended that values are assigned contiguously,
starting from 1.

The value for each entry must remain constant at least
from one re-initialization of an entity's network management
system to the next re-initialization."
::= { iptfsConfigTableEntry 1 }

congestionControl OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When set to true, the default, this enables the
congestion control on-the-wire exchange of data that is
required by congestion control algorithms, as defined by
RFC 5348. When set to false, IP-TFS sends fixed-sized
packets over an IP-TFS tunnel at a constant rate."
::= { iptfsConfigTableEntry 2 }

usePathMtuDiscovery OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Packet size is either auto-discovered or manually
configured. If usePathMtuDiscovery is true, the system
utilizes path-mtu to determine the maximum IP-TFS packet
size. If the packet size is explicitly configured,
then it will only be adjusted downward if use-path-mtu
is set."
::= { iptfsConfigTableEntry 3 }

outerPacketSize OBJECT-TYPE
SYNTAX UnsignedShort
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On transmission, the size of the outer encapsulating
tunnel packet (i.e., the IP packet containing
Encapsulating Security Payload)."
::= { iptfsConfigTableEntry 4 }

l2FixedRate OBJECT-TYPE
SYNTAX CounterBasedGauge64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP-TFS bit rate may be specified as a layer 2 wire
rate. On transmission, the target bandwidth/bit rate in
bits per second (bps) for the IP-TFS tunnel. This rate is
the nominal timing for the fixed-size packet. If
congestion control is enabled, the rate may be adjusted
down."
::= { iptfsConfigTableEntry 5 }

l3FixedRate OBJECT-TYPE
SYNTAX CounterBasedGauge64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP-TFS bit rate may be specified as a layer 3 packet
rate. On transmission, the target bandwidth/bit rate in
bps for the IP-TFS tunnel. This rate is the nominal timing
for the fixed-size packet. If congestion control is
enabled, the rate may be adjusted down."
::= { iptfsConfigTableEntry 6 }

dontFragment OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On transmission, disable packet fragmentation across
consecutive IP-TFS tunnel packets; inner packets larger
than what can be transmitted in outer packets will be
dropped."
::= { iptfsConfigTableEntry 7 }

maxAggregationTime OBJECT-TYPE
SYNTAX NanoSeconds
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On transmission, the maximum aggregation time is the
maximum length of time a received inner packet can be
held prior to transmission in the IP-TFS tunnel. Inner
packets that would be held longer than this time, based
on the current tunnel configuration, will be dropped
rather than be queued for transmission."
::= { iptfsConfigTableEntry 8 }

windowSize OBJECT-TYPE
SYNTAX UnsignedShort
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On reception, the maximum number of out-of-order
packets that will be reordered by an IP-TFS receiver
while performing the reordering operation. The value 0
disables any reordering."
::= { iptfsConfigTableEntry 9 }

sendImmediately OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On reception, send inner packets as soon as possible; do
not wait for lost or misordered outer packets.
Selecting this option reduces the inner (user) packet
delay but can amplify out-of-order delivery of the inner
packet stream in the presence of packet aggregation and
any reordering."
::= { iptfsConfigTableEntry 10 }

lostPacketTimerInterval OBJECT-TYPE
SYNTAX NanoSeconds
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On reception, this interval defines the length of time
an IP-TFS receiver will wait for a missing packet before
considering it lost. If not using send-immediately,
then each lost packet will delay inner (user) packets
until this timer expires. Setting this value too low can
impact reordering and reassembly."
::= { iptfsConfigTableEntry 11 }

ipsecStatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpsecStatsTableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The table containing basic statistics on IPsec."
::= { ipsecStatsGroup 1 }

ipsecStatsTableEntry OBJECT-TYPE
SYNTAX IpsecStatsTableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) containing the information on
a particular IKE SA."
INDEX { ipsecSaIndex }
::= { ipsecStatsTable 1 }

IpsecStatsTableEntry ::= SEQUENCE {
ipsecSaIndex Integer32,
-- packet statistics information
txPkts Counter64,
txOctets Counter64,
txDropPkts Counter64,
rxPkts Counter64,
rxOctets Counter64,
rxDropPkts Counter64
}

ipsecSaIndex OBJECT-TYPE
SYNTAX Integer32 (1..16777215)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique value, greater than zero, for each SA.
It is recommended that values are assigned contiguously,
starting from 1.

The value for each entry must remain constant at least
from one re-initialization of an entity's network management
system to the next re-initialization."
::= { ipsecStatsTableEntry 1 }

txPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Outbound Packet count."
::= { ipsecStatsTableEntry 2 }

txOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Outbound Packet bytes."
::= { ipsecStatsTableEntry 3 }

txDropPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Outbound dropped packets count."
::= { ipsecStatsTableEntry 4 }

rxPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Inbound Packet count."
::= { ipsecStatsTableEntry 5 }

rxOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Inbound Packet bytes."
::= { ipsecStatsTableEntry 6 }

rxDropPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Inbound dropped packets."
::= { ipsecStatsTableEntry 7 }

iptfsInnerStatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF IptfsInnerStatsSaEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The table containing information on IP-TFS
inner packets."
::= { iptfsInnerStatsGroup 1 }

iptfsInnerStatsTableEntry OBJECT-TYPE
SYNTAX IptfsInnerStatsSaEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing the information on
a particular IP-TFS SA."
INDEX { iptfsInnerSaIndex }
::= { iptfsInnerStatsTable 1 }

IptfsInnerStatsSaEntry ::= SEQUENCE {
iptfsInnerSaIndex Integer32,

txInnerPkts Counter64,
txInnerOctets Counter64,
rxInnerPkts Counter64,
rxInnerOctets Counter64,
rxIncompleteInnerPkts Counter64
}

iptfsInnerSaIndex OBJECT-TYPE
SYNTAX Integer32 (1..16777215)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique value, greater than zero, for each SA.
It is recommended that values are assigned contiguously,
starting from 1.

The value for each entry must remain constant at least
from one re-initialization of an entity's network management
system to the next re-initialization."
::= { iptfsInnerStatsTableEntry 1 }

txInnerPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of IP-TFS inner packets sent. This count
is whole packets only. A fragmented packet counts as
one packet."
::= { iptfsInnerStatsTableEntry 2 }

txInnerOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of IP-TFS inner octets sent. This is
inner packet octets only. This does not count padding."
::= { iptfsInnerStatsTableEntry 3 }

rxInnerPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of IP-TFS inner packets received."
::= { iptfsInnerStatsTableEntry 4 }

rxInnerOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of IP-TFS inner octets received. This does
not include padding or overhead."
::= { iptfsInnerStatsTableEntry 5 }

rxIncompleteInnerPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of IP-TFS inner packets that were
incomplete. Usually, this is due to fragments not
received. Also, this may be due to misordering or
errors in received outer packets."
::= { iptfsInnerStatsTableEntry 6 }

iptfsOuterStatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF IptfsOuterStatsSaEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The table containing information on IP-TFS."
::= { iptfsOuterStatsGroup 1 }

iptfsOuterStatsTableEntry OBJECT-TYPE
SYNTAX IptfsOuterStatsSaEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing the information on
a particular IP-TFS SA."
INDEX { iptfsOuterSaIndex }
::= { iptfsOuterStatsTable 1 }

IptfsOuterStatsSaEntry ::= SEQUENCE {
iptfsOuterSaIndex Integer32,

-- iptfs packet statistics information
txExtraPadPkts Counter64,
txExtraPadOctets Counter64,
txAllPadPkts Counter64,
txAllPadOctets Counter64,
rxExtraPadPkts Counter64,
rxExtraPadOctets Counter64,
rxAllPadPkts Counter64,
rxAllPadOctets Counter64,
rxErroredPkts Counter64,
rxMissedPkts Counter64
}

iptfsOuterSaIndex OBJECT-TYPE
SYNTAX Integer32 (1..16777215)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique value, greater than zero, for each SA.
It is recommended that values are assigned contiguously,
starting from 1.

The value for each entry must remain constant at least
from one re-initialization of an entity's network management
system to the next re-initialization."
::= { iptfsOuterStatsTableEntry 1 }

txExtraPadPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of transmitted outer IP-TFS packets that
included some padding."
::= { iptfsOuterStatsTableEntry 2 }

txExtraPadOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of transmitted octets of padding added to
outer IP-TFS packets with data."
::= { iptfsOuterStatsTableEntry 3 }

txAllPadPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of transmitted IP-TFS packets that were
all padding with no inner packet data."
::= { iptfsOuterStatsTableEntry 4 }

txAllPadOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number transmitted octets of padding added to
IP-TFS packets with no inner packet data."
::= { iptfsOuterStatsTableEntry 5 }

rxExtraPadPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of received outer IP-TFS packets that
included some padding."
::= { iptfsOuterStatsTableEntry 6 }

rxExtraPadOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of received octets of padding added to
outer IP-TFS packets with data."
::= { iptfsOuterStatsTableEntry 7 }

rxAllPadPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of received IP-TFS packets that were all
padding with no inner packet data."
::= { iptfsOuterStatsTableEntry 8 }

rxAllPadOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number received octets of padding added to
IP-TFS packets with no inner packet data."
::= { iptfsOuterStatsTableEntry 9 }

rxErroredPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of IP-TFS outer packets dropped due to
errors."
::= { iptfsOuterStatsTableEntry 10 }

rxMissedPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of IP-TFS outer packets missing indicated
by a missing sequence number."
::= { iptfsOuterStatsTableEntry 11 }

--
-- Iptfs Module Compliance
--

iptfsMIBConformances OBJECT IDENTIFIER
::= { iptfsMIBConformance 1 }

iptfsMIBGroups OBJECT IDENTIFIER
::= { iptfsMIBConformance 2 }

iptfsMIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for entities that
implement the IP-TFS MIB."
MODULE -- this module
MANDATORY-GROUPS {
iptfsMIBConfGroup,
ipsecStatsConfGroup,
iptfsInnerStatsConfGroup,
iptfsOuterStatsConfGroup
}

::= { iptfsMIBConformances 1 }

--
-- MIB Groups (Units of Conformance)
--

iptfsMIBConfGroup OBJECT-GROUP
OBJECTS {
congestionControl,
usePathMtuDiscovery,
outerPacketSize ,
l2FixedRate ,
l3FixedRate ,
dontFragment,
maxAggregationTime,
windowSize,
sendImmediately,
lostPacketTimerInterval
}
STATUS current
DESCRIPTION
"A collection of objects providing per SA IP-TFS
configuration."
::= { iptfsMIBGroups 1 }

ipsecStatsConfGroup OBJECT-GROUP
OBJECTS {
txPkts,
txOctets,
txDropPkts,
rxPkts,
rxOctets,
rxDropPkts
}
STATUS current
DESCRIPTION
"A collection of objects providing per SA basic
statistics."
::= { iptfsMIBGroups 2 }

iptfsInnerStatsConfGroup OBJECT-GROUP
OBJECTS {
txInnerPkts,
txInnerOctets,
rxInnerPkts,
rxInnerOctets,
rxIncompleteInnerPkts
}
STATUS current
DESCRIPTION
"A collection of objects providing per SA IP-TFS
inner packet statistics."
::= { iptfsMIBGroups 3 }

iptfsOuterStatsConfGroup OBJECT-GROUP
OBJECTS {
txExtraPadPkts,
txExtraPadOctets,
txAllPadPkts,
txAllPadOctets,
rxExtraPadPkts,
rxExtraPadOctets,
rxAllPadPkts,
rxAllPadOctets,
rxErroredPkts,
rxMissedPkts
}
STATUS current
DESCRIPTION
"A collection of objects providing per SA IP-TFS
outer packet statistics."
::= { iptfsMIBGroups 4 }

END
<CODE ENDS>

5. IANA Considerations

The MIB module in this document uses the following IANA-assigned
OBJECT IDENTIFIER value, recorded in the "SMI Network Management MGMT
Codes Internet-standard MIB" registry:

+=========+==========+==============================+
| Decimal | Name | Description |
+=========+==========+==============================+
| 246 | iptfsMIB | IP-TRAFFIC-FLOW-SECURITY-MIB |
+---------+----------+------------------------------+

Table 1

6. Security Considerations

The MIB specified in this document can read the operational behavior
of IP Traffic Flow Security. For the implications regarding write
configuration, consult [RFC9347], which defines the functionality.

There are no management objects defined in this MIB module that have
a MAX-ACCESS clause of read-write and/or read-create. So, if this
MIB module is implemented correctly, then there is no risk that an
intruder can alter or create any management objects of this MIB
module via direct SNMP SET operations.

Some of the objects in this MIB module may be considered sensitive or
vulnerable in some network environments. This includes INDEX objects
with a MAX-ACCESS of not-accessible, and any indices from other
modules exposed via AUGMENTS. It is thus important to control even
GET and/or NOTIFY access to these objects and possibly to even
encrypt the values of these objects when sending them over the
network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:

* iptfsInnerStatsTable and iptfsOuterStatsTable: Access to IP inner
and outer Traffic Flow Security statistics can provide information
that IP Traffic Flow Security obscures, such as the true activity
of the flows using IP Traffic Flow Security.

SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPsec),
there is no control as to who on the secure network is allowed to
access and GET (read) the objects in this MIB module.

Implementations SHOULD provide the security features described by the
SNMPv3 framework (see [RFC3410]), and implementations claiming
compliance to the SNMPv3 standard MUST include full support for
authentication and privacy via the User-based Security Model (USM)
[RFC3414] with the AES cipher algorithm [RFC3826]. Implementations
MAY also provide support for the Transport Security Model (TSM)
[RFC5591] in combination with a secure transport such as SSH
[RFC5592] or TLS/DTLS [RFC6353].

Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module 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.

7. References

7.1. Normative References

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.

[RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Structure of Management Information
Version 2 (SMIv2)", STD 58, RFC 2578,
DOI 10.17487/RFC2578, April 1999,
<https://www.rfc-editor.org/info/rfc2578>.

[RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Textual Conventions for SMIv2",
STD 58, RFC 2579, DOI 10.17487/RFC2579, April 1999,
<https://www.rfc-editor.org/info/rfc2579>.

[RFC2580] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Conformance Statements for SMIv2",
STD 58, RFC 2580, DOI 10.17487/RFC2580, April 1999,
<https://www.rfc-editor.org/info/rfc2580>.

[RFC3414] Blumenthal, U. and B. Wijnen, "User-based Security Model
(USM) for version 3 of the Simple Network Management
Protocol (SNMPv3)", STD 62, RFC 3414,
DOI 10.17487/RFC3414, December 2002,
<https://www.rfc-editor.org/info/rfc3414>.

[RFC3826] Blumenthal, U., Maino, F., and K. McCloghrie, "The
Advanced Encryption Standard (AES) Cipher Algorithm in the
SNMP User-based Security Model", RFC 3826,
DOI 10.17487/RFC3826, June 2004,
<https://www.rfc-editor.org/info/rfc3826>.

[RFC5591] Harrington, D. and W. Hardaker, "Transport Security Model
for the Simple Network Management Protocol (SNMP)",
STD 78, RFC 5591, DOI 10.17487/RFC5591, June 2009,
<https://www.rfc-editor.org/info/rfc5591>.

[RFC5592] Harrington, D., Salowey, J., and W. Hardaker, "Secure
Shell Transport Model for the Simple Network Management
Protocol (SNMP)", RFC 5592, DOI 10.17487/RFC5592, June
2009, <https://www.rfc-editor.org/info/rfc5592>.

[RFC6353] Hardaker, W., "Transport Layer Security (TLS) Transport
Model for the Simple Network Management Protocol (SNMP)",
STD 78, RFC 6353, DOI 10.17487/RFC6353, July 2011,
<https://www.rfc-editor.org/info/rfc6353>.

[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.

[RFC9347] Hopps, C., "Aggregation and Fragmentation Mode for
Encapsulating Security Payload (ESP) and Its Use for IP
Traffic Flow Security (IP-TFS)", RFC 9347,
DOI 10.17487/RFC9347, January 2023,
<https://www.rfc-editor.org/info/rfc9347>.

7.2. Informative References

[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for Internet-
Standard Management Framework", RFC 3410,
DOI 10.17487/RFC3410, December 2002,
<https://www.rfc-editor.org/info/rfc3410>.

[RFC4301] Kent, S. and K. Seo, "Security Architecture for the
Internet Protocol", RFC 4301, DOI 10.17487/RFC4301,
December 2005, <https://www.rfc-editor.org/info/rfc4301>.

[RFC5348] Floyd, S., Handley, M., Padhye, J., and J. Widmer, "TCP
Friendly Rate Control (TFRC): Protocol Specification",
RFC 5348, DOI 10.17487/RFC5348, September 2008,
<https://www.rfc-editor.org/info/rfc5348>.

[RFC9348] Fedyk, D. and C. Hopps, "A YANG Data Model for IP Traffic
Flow Security", RFC 9348, DOI 10.17487/RFC9348, January
2023, <https://www.rfc-editor.org/info/rfc9348>.

Acknowledgements

The authors would like to thank Chris Hopps, Lou Berger, and Tero
Kivinen for their help and feedback on the MIB model.

Authors' Addresses

Don Fedyk
LabN Consulting, L.L.C.
Email: [email protected]

Eric Kinzie
LabN Consulting, L.L.C.
Email: [email protected]