draft-ietf-bfd-mib-05.txt   draft-ietf-bfd-mib-06.txt 
BFD Working Group T. Nadeau BFD Working Group T. Nadeau
Internet-Draft BT Internet-Draft BT
Intended status: Standards Track Z. Ali Intended status: Standards Track Z. Ali
Expires: February 5, 2009 Cisco Systems, Inc. Expires: May 4, 2009 Cisco Systems, Inc.
N. Akiya N. Akiya
Cisco Systems G.K. Cisco Systems G.K.
August 4, 2008 October 31, 2008
BFD Management Information Base BFD Management Information Base
draft-ietf-bfd-mib-05 draft-ietf-bfd-mib-06
Status of this Memo Status of this Memo
By submitting this Internet-Draft, each author represents that any By submitting this Internet-Draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware applicable patent or other IPR claims of which he or she is aware
have been or will be disclosed, and any of which he or she becomes have been or will be disclosed, and any of which he or she becomes
aware will be disclosed, in accordance with Section 6 of BCP 79. aware will be disclosed, in accordance with Section 6 of BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
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and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on February 5, 2009. This Internet-Draft will expire on May 4, 2009.
Abstract Abstract
This draft defines a portion of the Management Information Base (MIB) This draft defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community. for use with network management protocols in the Internet community.
In particular, it describes managed objects for modeling In particular, it describes managed objects for modeling
Bidirectional Forwarding Detection (BFD) protocol. Bidirectional Forwarding Detection (BFD) protocol.
Table of Contents Table of Contents
skipping to change at page 2, line 19 skipping to change at page 2, line 19
3. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
5. Brief Description of MIB Objects . . . . . . . . . . . . . . . 3 5. Brief Description of MIB Objects . . . . . . . . . . . . . . . 3
5.1. General Variables . . . . . . . . . . . . . . . . . . . . 4 5.1. General Variables . . . . . . . . . . . . . . . . . . . . 4
5.2. Session Table (bfdSessionTable) . . . . . . . . . . . . . 4 5.2. Session Table (bfdSessionTable) . . . . . . . . . . . . . 4
5.3. Session Performance Table (bfdSessionPerfTable) . . . . . 4 5.3. Session Performance Table (bfdSessionPerfTable) . . . . . 4
5.4. BFD Session Discriminator Mapping Table 5.4. BFD Session Discriminator Mapping Table
(bfdSessDiscMapTable) . . . . . . . . . . . . . . . . . . 4 (bfdSessDiscMapTable) . . . . . . . . . . . . . . . . . . 4
5.5. BFD Session IP Mapping Table (bfdSessIpMapTable) . . . . . 4 5.5. BFD Session IP Mapping Table (bfdSessIpMapTable) . . . . . 4
6. BFD MIB Module Definitions . . . . . . . . . . . . . . . . . . 4 6. BFD MIB Module Definitions . . . . . . . . . . . . . . . . . . 4
7. Security Considerations . . . . . . . . . . . . . . . . . . . 26 7. Security Considerations . . . . . . . . . . . . . . . . . . . 27
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 28 8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 28
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.1. Normative References . . . . . . . . . . . . . . . . . . . 29 9.1. Normative References . . . . . . . . . . . . . . . . . . . 29
9.2. Informative References . . . . . . . . . . . . . . . . . . 29 9.2. Informative References . . . . . . . . . . . . . . . . . . 29
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . . 30 Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . . 30
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 30 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 30
Intellectual Property and Copyright Statements . . . . . . . . . . 31 Intellectual Property and Copyright Statements . . . . . . . . . . 32
1. Requirements notation 1. Requirements notation
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119]. document are to be interpreted as described in [RFC2119].
2. The Internet-Standard Management Framework 2. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current For a detailed overview of the documents that describe the current
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Objects in the MIB are defined using the mechanisms defined in the Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58, module that is compliant to the SMIv2, which is described in STD 58,
[RFC2578], STD 58, [RFC2579] and STD 58, [RFC2580]. [RFC2578], STD 58, [RFC2579] and STD 58, [RFC2580].
3. Introduction 3. Introduction
This memo defines an portion of the Management Information Base (MIB) This memo defines an portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community. for use with network management protocols in the Internet community.
In particular, it describes managed objects to configure and/or In particular, it describes managed objects to configure and/or
monitor Bi-Directional Forwarding Detection for [BFD] and [BFD-MH], monitor Bi-Directional Forwarding Detection for [BFD], [BFD-1HOP] and
BFD versions 0 and/or 1, on devices supporting this feature. [BFD-MH], BFD versions 0 and/or 1, on devices supporting this
feature.
-- Ed Note: TBA, support for [BFD-LSP].
Comments should be made directly to the BFD mailing list at Comments should be made directly to the BFD mailing list at
rtg-bfd@ietf.org. rtg-bfd@ietf.org.
4. Terminology 4. Terminology
This document adopts the definitions, acronyms and mechanisms This document adopts the definitions, acronyms and mechanisms
described in [BFD], [BFD-MH] and [BFD-LSP]. Unless otherwise stated, described in [BFD], [BFD-1HOP] and [BFD-MH]. Unless otherwise
the mechanisms described therein will not be re-described here. stated, the mechanisms described therein will not be re-described
here.
5. Brief Description of MIB Objects 5. Brief Description of MIB Objects
This section describes objects pertaining to BFD. The MIB objects This section describes objects pertaining to BFD. The MIB objects
are derived from [BFD] and [BFD-MH]. are derived from [BFD] and [BFD-MH].
5.1. General Variables 5.1. General Variables
The General Variables are used to identify parameters that are global The General Variables are used to identify parameters that are global
to the BFD process. to the BFD process.
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MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
FROM SNMPv2-CONF FROM SNMPv2-CONF
InterfaceIndexOrZero InterfaceIndexOrZero
FROM IF-MIB FROM IF-MIB
InetAddress, InetAddressType, InetPortNumber InetAddress, InetAddressType, InetPortNumber
FROM INET-ADDRESS-MIB; FROM INET-ADDRESS-MIB;
bfdMib MODULE-IDENTITY bfdMib MODULE-IDENTITY
LAST-UPDATED "200808041200Z" -- 4 August 2008 12:00:00 EST LAST-UPDATED "200810311200Z" -- 31 October 2008 12:00:00 EST
ORGANIZATION "IETF Bidirectional Forwarding Detection ORGANIZATION "IETF Bidirectional Forwarding Detection
Working Group" Working Group"
CONTACT-INFO CONTACT-INFO
"Thomas D. Nadeau "Thomas D. Nadeau
BT BT
Email: tom.nadeau@bt.com Email: tom.nadeau@bt.com
Zafar Ali Zafar Ali
Cisco Systems, Inc. Cisco Systems, Inc.
Email: zali@cisco.com Email: zali@cisco.com
Nobo Akiya Nobo Akiya
Cisco Systems, G.K. Cisco Systems, G.K.
Email: nobo@cisco.com" Email: nobo@cisco.com"
DESCRIPTION DESCRIPTION
"Bidirectional Forwarding Management Information Base." "Bidirectional Forwarding Management Information Base."
REVISION "200808041200Z" -- 4 Auguest 2008 12:00:00 EST REVISION "200810311200Z" -- 31 October 2008 12:00:00 EST
DESCRIPTION DESCRIPTION
"Initial version. Published as RFC xxxx." "Initial version. Published as RFC xxxx."
-- RFC Ed.: RFC-editor pls fill in xxxx -- RFC Ed.: RFC-editor pls fill in xxxx
::= { mib-2 XXX } ::= { mib-2 XXX }
-- RFC Ed.: assigned by IANA, see section 7.1 for details -- RFC Ed.: assigned by IANA, see section 7.1 for details
-- Top level components of this MIB module. -- Top level components of this MIB module.
bfdNotifications OBJECT IDENTIFIER ::= { bfdMIB 0 } bfdNotifications OBJECT IDENTIFIER ::= { bfdMIB 0 }
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STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The BFD interval delay in microseconds." "The BFD interval delay in microseconds."
SYNTAX Unsigned32 (0..4294967295) SYNTAX Unsigned32 (0..4294967295)
BfdDiag ::= TEXTUAL-CONVENTION BfdDiag ::= TEXTUAL-CONVENTION
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"A common BFD diagnostic code." "A common BFD diagnostic code."
SYNTAX INTEGER { SYNTAX INTEGER {
noDiagnostic(1), noDiagnostic(0),
controlDetectionTimeExpired(2), controlDetectionTimeExpired(1),
echoFunctionFailed(3), echoFunctionFailed(2),
neighborSignaledSessionDown(4), neighborSignaledSessionDown(3),
forwardingPlaneReset(5), forwardingPlaneReset(4),
pathDown(6), pathDown(5),
concatenatedPathDown(7), concatenatedPathDown(6),
administrativelyDown(8), administrativelyDown(7),
reverseConcatenatedPathDown(9) reverseConcatenatedPathDown(8)
} }
-- BFD General Variables -- BFD General Variables
-- These parameters apply globally to the Systems' -- These parameters apply globally to the Systems'
-- BFD Process. -- BFD Process.
bfdAdminStatus OBJECT-TYPE bfdAdminStatus OBJECT-TYPE
SYNTAX INTEGER { SYNTAX INTEGER {
enabled(1), enabled(1),
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STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The BFD Session Entry describes BFD session." "The BFD Session Entry describes BFD session."
INDEX { bfdSessIndex } INDEX { bfdSessIndex }
::= { bfdSessTable 1 } ::= { bfdSessTable 1 }
BfdSessEntry ::= SEQUENCE { BfdSessEntry ::= SEQUENCE {
bfdSessIndex BfdSessIndexTC, bfdSessIndex BfdSessIndexTC,
bfdSessVersionNumber Unsigned32, bfdSessVersionNumber Unsigned32,
bfdSessType INTEGER, bfdSessType INTEGER,
bfdSessMultiHopUniLinkMode INTEGER,
bfdSessDiscriminator Unsigned32, bfdSessDiscriminator Unsigned32,
bfdSessRemoteDiscr Unsigned32, bfdSessRemoteDiscr Unsigned32,
bfdSessDestinationUdpPort InetPortNumber, bfdSessDestinationUdpPort InetPortNumber,
bfdSessSourceUdpPort InetPortNumber, bfdSessSourceUdpPort InetPortNumber,
bfdSessEchoSourceUdpPort InetPortNumber, bfdSessEchoSourceUdpPort InetPortNumber,
bfdSessAdminStatus INTEGER, bfdSessAdminStatus INTEGER,
bfdSessState INTEGER, bfdSessState INTEGER,
bfdSessRemoteHeardFlag TruthValue, bfdSessRemoteHeardFlag TruthValue,
bfdSessDiag BfdDiag, bfdSessDiag BfdDiag,
bfdSessOperMode INTEGER, bfdSessOperMode INTEGER,
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BFD session." BFD session."
REFERENCE REFERENCE
"BFD Version 0 (draft-katz-ward-bfd-02.txt) and "BFD Version 0 (draft-katz-ward-bfd-02.txt) and
BFD Version 1 (draft-ietf-bfd-base-08.txt)" BFD Version 1 (draft-ietf-bfd-base-08.txt)"
DEFVAL { 1 } DEFVAL { 1 }
::= { bfdSessEntry 2 } ::= { bfdSessEntry 2 }
bfdSessType OBJECT-TYPE bfdSessType OBJECT-TYPE
SYNTAX INTEGER { SYNTAX INTEGER {
singleHop(1), singleHop(1),
multiHop(2) multiHopTotallyArbitraryPaths(2),
multiHopOutOfBandSignaling(3),
multiHopUnidirectionalLinks(4)
} }
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The type of this BFD session." "This object specifies the type of this BFD session."
REFERENCE
"draft-ietf-bfd-v4v6-1hop-08 and
draft-ietf-bfd-multihop-06"
::= { bfdSessEntry 3 } ::= { bfdSessEntry 3 }
bfdSessMultiHopUniLinkMode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
active(2),
passive(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"For bfdSessType of multiHopUnidirectionalLinks(4), this
object specifies whether this BFD session is running in
active(2) mode or passive(3) mode. For all other BFD
bfdSessType BFD sessions, none(1) MUST be specified."
REFERENCE
"draft-ietf-bfd-multihop-06, Section 3.3"
::= { bfdSessEntry 4 }
bfdSessDiscriminator OBJECT-TYPE bfdSessDiscriminator OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295) SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the local discriminator for this BFD "This object specifies the local discriminator for this BFD
session, used to uniquely identify it." session, used to uniquely identify it."
::= { bfdSessEntry 4 } ::= { bfdSessEntry 5 }
bfdSessRemoteDiscr OBJECT-TYPE bfdSessRemoteDiscr OBJECT-TYPE
SYNTAX Unsigned32 (0 | 1..4294967295) SYNTAX Unsigned32 (0 | 1..4294967295)
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the session discriminator chosen "This object specifies the session discriminator chosen
by the remote system for this BFD session. The value may by the remote system for this BFD session. The value may
be zero(0) if the remote discriminator is not yet known be zero(0) if the remote discriminator is not yet known
or if the session is in the down or adminDown(1) state." or if the session is in the down or adminDown(1) state."
REFERENCE REFERENCE
"draft-ietf-bfd-base-08, Section 6.8.6." "draft-ietf-bfd-base-08, Section 6.8.6."
::= { bfdSessEntry 5 } ::= { bfdSessEntry 6 }
bfdSessDestinationUdpPort OBJECT-TYPE bfdSessDestinationUdpPort OBJECT-TYPE
SYNTAX InetPortNumber SYNTAX InetPortNumber
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the destination UDP port used for "This object specifies the destination UDP port used for
this BFD session. The value maybe zero(0) if the session this BFD session. The value maybe zero(0) if the session
is in adminDown(1) state." is in adminDown(1) state."
REFERENCE REFERENCE
"Port 3784 (draft-ietf-bfd-v4v6-1hop-08), "Port 3784 (draft-ietf-bfd-v4v6-1hop-08),
Port 3785 (draft-ietf-bfd-v4v6-1hop-08), and Port 3785 (draft-ietf-bfd-v4v6-1hop-08), and
Port 4784 (draft-ietf-bfd-multihop-06)" Port 4784 (draft-ietf-bfd-multihop-06)"
DEFVAL { 0 } DEFVAL { 0 }
::= { bfdSessEntry 6 } ::= { bfdSessEntry 7 }
bfdSessSourceUdpPort OBJECT-TYPE bfdSessSourceUdpPort OBJECT-TYPE
SYNTAX InetPortNumber SYNTAX InetPortNumber
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the source UDP port of BFD control "This object specifies the source UDP port of BFD control
packets for this BFD session. The value maybe zero(0) if packets for this BFD session. The value maybe zero(0) if
the session is in adminDown(1) state." the session is in adminDown(1) state."
REFERENCE REFERENCE
"draft-ietf-bfd-v4v6-1hop-08 and "draft-ietf-bfd-v4v6-1hop-08 and
draft-ietf-bfd-multihop-06" draft-ietf-bfd-multihop-06"
DEFVAL { 0 } DEFVAL { 0 }
::= { bfdSessEntry 7 } ::= { bfdSessEntry 8 }
bfdSessEchoSourceUdpPort OBJECT-TYPE bfdSessEchoSourceUdpPort OBJECT-TYPE
SYNTAX InetPortNumber SYNTAX InetPortNumber
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the source UDP port of BFD echo "This object specifies the source UDP port of BFD echo
packets for this BFD session. The value maybe zero(0) if packets for this BFD session. The value maybe zero(0) if
the session is not running in the echo mode, or the the session is not running in the echo mode, or the
session is in adminDown(1) state." session is in adminDown(1) state."
REFERENCE REFERENCE
"draft-ietf-bfd-v4v6-1hop-08 and "draft-ietf-bfd-v4v6-1hop-08 and
draft-ietf-bfd-multihop-06" draft-ietf-bfd-multihop-06"
DEFVAL { 0 } DEFVAL { 0 }
::= { bfdSessEntry 8 } ::= { bfdSessEntry 9 }
bfdSessAdminStatus OBJECT-TYPE bfdSessAdminStatus OBJECT-TYPE
SYNTAX INTEGER { SYNTAX INTEGER {
stop(1), stop(1),
start(2) start(2)
} }
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"A transition from 'stop' to 'start' will start "A transition from 'stop' to 'start' will start
the BFD state machine for the session. The state the BFD state machine for the session. The state
machine will have an initial state of down. machine will have an initial state of down.
A transition from 'start' to 'stop' will cause A transition from 'start' to 'stop' will cause
the BFD sesssion to be brought down to the BFD sesssion to be brought down to
adminDown(1). Care should be used in providing adminDown(1). Care should be used in providing
write access to this object without adequate write access to this object without adequate
authentication." authentication."
DEFVAL { 2 } DEFVAL { 2 }
::= { bfdSessEntry 9 } ::= { bfdSessEntry 10 }
bfdSessState OBJECT-TYPE bfdSessState OBJECT-TYPE
SYNTAX INTEGER { SYNTAX INTEGER {
adminDown(1), adminDown(1),
down(2), down(2),
init(3), init(3),
up(4), up(4),
failing(5) failing(5)
} }
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The perceived state of the BFD session. "The perceived state of the BFD session.
BFD State failing(5) is only applicable if this BFD BFD State failing(5) is only applicable if this BFD
session is running version 0. session is running version 0.
Upon creation of a new BFD session via this MIB, the Upon creation of a new BFD session via this MIB, the
suggested initial state is down(2)." suggested initial state is down(2)."
DEFVAL { 2 } DEFVAL { 2 }
::= { bfdSessEntry 10 } ::= { bfdSessEntry 11 }
bfdSessRemoteHeardFlag OBJECT-TYPE bfdSessRemoteHeardFlag OBJECT-TYPE
SYNTAX TruthValue SYNTAX TruthValue
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies status of BFD packet reception from "This object specifies status of BFD packet reception from
the remote system. Specifically, it is set to true(1) if the remote system. Specifically, it is set to true(1) if
the local system is actively receiving BFD packets from the the local system is actively receiving BFD packets from the
remote system, and is set to false(2) if the local system remote system, and is set to false(2) if the local system
has not received BFD packets recently (within the detection has not received BFD packets recently (within the detection
time) or if the local system is attempting to tear down time) or if the local system is attempting to tear down
the BFD session." the BFD session."
REFERENCE REFERENCE
"BFD Version 0 (draft-katz-ward-bfd-02.txt) and "BFD Version 0 (draft-katz-ward-bfd-02.txt) and
BFD Version 1 (draft-ietf-bfd-base-08.txt)" BFD Version 1 (draft-ietf-bfd-base-08.txt)"
DEFVAL { false } DEFVAL { false }
::= { bfdSessEntry 11 } ::= { bfdSessEntry 12 }
bfdSessDiag OBJECT-TYPE bfdSessDiag OBJECT-TYPE
SYNTAX BfdDiag SYNTAX BfdDiag
MAX-ACCESS accessible-for-notify MAX-ACCESS accessible-for-notify
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"A diagnostic code specifying the local system's reason "A diagnostic code specifying the local system's reason
for the last transition of the session from up(4) for the last transition of the session from up(4)
to some other state." to some other state."
::= { bfdSessEntry 12 } ::= { bfdSessEntry 13 }
bfdSessOperMode OBJECT-TYPE bfdSessOperMode OBJECT-TYPE
SYNTAX INTEGER { SYNTAX INTEGER {
asyncModeWEchoFun(1), asyncModeWEchoFun(1),
asynchModeWOEchoFun(2), asynchModeWOEchoFun(2),
demandModeWEchoFunction(3), demandModeWEchoFunction(3),
demandModeWOEchoFunction(4) demandModeWOEchoFunction(4)
} }
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies current operating mode that BFD "This object specifies current operating mode that BFD
session is operating in." session is operating in."
::= { bfdSessEntry 13 } ::= { bfdSessEntry 14 }
bfdSessDemandModeDesiredFlag OBJECT-TYPE bfdSessDemandModeDesiredFlag OBJECT-TYPE
SYNTAX TruthValue SYNTAX TruthValue
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object indicates that the local system's "This object indicates that the local system's
desire to use Demand mode. Specifically, it is set desire to use Demand mode. Specifically, it is set
to true(1) if the local system wishes to use to true(1) if the local system wishes to use
Demand mode or false(2) if not" Demand mode or false(2) if not"
DEFVAL { false } DEFVAL { false }
::= { bfdSessEntry 14 } ::= { bfdSessEntry 15 }
bfdSessControlPlaneIndepFlag OBJECT-TYPE bfdSessControlPlaneIndepFlag OBJECT-TYPE
SYNTAX TruthValue SYNTAX TruthValue
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object indicates that the local system's "This object indicates that the local system's
ability to continue to function through a disruption of ability to continue to function through a disruption of
the control plane. Specifically, it is set the control plane. Specifically, it is set
to true(1) if the local system BFD implementation is to true(1) if the local system BFD implementation is
independent of the control plane. Otherwise, the independent of the control plane. Otherwise, the
value is set to false(2)" value is set to false(2)"
DEFVAL { false } DEFVAL { false }
::= { bfdSessEntry 15 } ::= { bfdSessEntry 16 }
bfdSessInterface OBJECT-TYPE bfdSessInterface OBJECT-TYPE
SYNTAX InterfaceIndexOrZero SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object contains an interface index used to indicate "This object contains an interface index used to indicate
the interface which this BFD session is running on. This the interface which this BFD session is running on. This
value can be zero if there is no interface associated value can be zero if there is no interface associated
with this BFD session." with this BFD session."
::= { bfdSessEntry 16 } ::= { bfdSessEntry 17 }
bfdSessAddrType OBJECT-TYPE bfdSessAddrType OBJECT-TYPE
SYNTAX InetAddressType SYNTAX InetAddressType
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies IP address type of the neighboring IP "This object specifies IP address type of the neighboring IP
address which is being monitored with this BFD session. address which is being monitored with this BFD session.
Only values unknown(0), ipv4(1), ipv6(2), or ipv6z(4) Only values unknown(0), ipv4(1), ipv6(2), or ipv6z(4)
have to be supported. have to be supported.
A value of unknown(0) is allowed only when A value of unknown(0) is allowed only when
the outgoing interface is of type point-to-point, or the outgoing interface is of type point-to-point, or
when the BFD session is not associated with a specific when the BFD session is not associated with a specific
interface. interface.
If any other unsupported values are attempted in a set If any other unsupported values are attempted in a set
operation, the agent MUST return an inconsistentValue operation, the agent MUST return an inconsistentValue
error." error."
::= { bfdSessEntry 17 } ::= { bfdSessEntry 18 }
bfdSessAddr OBJECT-TYPE bfdSessAddr OBJECT-TYPE
SYNTAX InetAddress SYNTAX InetAddress
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the neighboring IP address which is "This object specifies the neighboring IP address which is
being monitored with this BFD session. being monitored with this BFD session.
It can also be used to enabled BFD on a specific It can also be used to enabled BFD on a specific
interface. The value is set to zero when BFD session is not interface. The value is set to zero when BFD session is not
associated with a specific interface." associated with a specific interface."
::= { bfdSessEntry 18 } ::= { bfdSessEntry 19 }
bfdSessGTSM OBJECT-TYPE bfdSessGTSM OBJECT-TYPE
SYNTAX TruthValue SYNTAX TruthValue
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"Setting the value of this object to true(1) will enable GTSM "Setting the value of this object to true(1) will enable GTSM
protection of the BFD session. GTSM MUST be enabled on a protection of the BFD session. GTSM MUST be enabled on a
singleHop(1) session if no authentication is in use." singleHop(1) session if no authentication is in use."
REFERENCE REFERENCE
skipping to change at page 14, line 4 skipping to change at page 14, line 26
bfdSessGTSM OBJECT-TYPE bfdSessGTSM OBJECT-TYPE
SYNTAX TruthValue SYNTAX TruthValue
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"Setting the value of this object to true(1) will enable GTSM "Setting the value of this object to true(1) will enable GTSM
protection of the BFD session. GTSM MUST be enabled on a protection of the BFD session. GTSM MUST be enabled on a
singleHop(1) session if no authentication is in use." singleHop(1) session if no authentication is in use."
REFERENCE REFERENCE
"RFC 5082 - The Generalized TTL Security Mechanism (GTSM). "RFC 5082 - The Generalized TTL Security Mechanism (GTSM).
draft-ietf-bfd-v4v6-1hop-08, Sec. 5" draft-ietf-bfd-v4v6-1hop-08, Sec. 5"
DEFVAL { false } DEFVAL { false }
::= { bfdSessEntry 19 } ::= { bfdSessEntry 20 }
bfdSessGTSMTTL OBJECT-TYPE bfdSessGTSMTTL OBJECT-TYPE
SYNTAX Unsigned32 (0..255) SYNTAX Unsigned32 (0..255)
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object is valid only when bfdSessGTSM protection is "This object is valid only when bfdSessGTSM protection is
enabled on the system. This object specifies the minimum enabled on the system. This object specifies the minimum
allowed TTL for received BFD control packets. For allowed TTL for received BFD control packets. For
singleHop(1) session, if GTSM protection is enabled, singleHop(1) session, if GTSM protection is enabled,
this object SHOULD be set to maximum TTL allowed for this object SHOULD be set to maximum TTL allowed for
single hop." single hop."
REFERENCE REFERENCE
"RFC 5082 - The Generalized TTL Security Mechanism (GTSM). "RFC 5082 - The Generalized TTL Security Mechanism (GTSM).
draft-ietf-bfd-v4v6-1hop-08, Sec. 5" draft-ietf-bfd-v4v6-1hop-08, Sec. 5"
DEFVAL { 0 } DEFVAL { 0 }
::= { bfdSessEntry 20 } ::= { bfdSessEntry 21 }
bfdSessDesiredMinTxInterval OBJECT-TYPE bfdSessDesiredMinTxInterval OBJECT-TYPE
SYNTAX BfdInterval SYNTAX BfdInterval
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the minimum interval, in "This object specifies the minimum interval, in
microseconds, that the local system would like to use when microseconds, that the local system would like to use when
transmitting BFD Control packets." transmitting BFD Control packets."
::= { bfdSessEntry 21 } ::= { bfdSessEntry 22 }
bfdSessReqMinRxInterval OBJECT-TYPE bfdSessReqMinRxInterval OBJECT-TYPE
SYNTAX BfdInterval SYNTAX BfdInterval
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the minimum interval, in "This object specifies the minimum interval, in
microseconds, between received BFD Control packets the microseconds, between received BFD Control packets the
local system is capable of supporting." local system is capable of supporting."
::= { bfdSessEntry 22 } ::= { bfdSessEntry 23 }
bfdSessReqMinEchoRxInterval OBJECT-TYPE bfdSessReqMinEchoRxInterval OBJECT-TYPE
SYNTAX BfdInterval SYNTAX BfdInterval
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the minimum interval, in "This object specifies the minimum interval, in
microseconds, between received BFD Echo packets that this microseconds, between received BFD Echo packets that this
system is capable of supporting." system is capable of supporting."
::= { bfdSessEntry 23 } ::= { bfdSessEntry 24 }
bfdSessDetectMult OBJECT-TYPE bfdSessDetectMult OBJECT-TYPE
SYNTAX Unsigned32 SYNTAX Unsigned32
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the Detect time multiplier." "This object specifies the Detect time multiplier."
::= { bfdSessEntry 24 } ::= { bfdSessEntry 25 }
bfdSessNegotiatedInterval OBJECT-TYPE bfdSessNegotiatedInterval OBJECT-TYPE
SYNTAX BfdInterval SYNTAX BfdInterval
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the negotiated interval, in "This object specifies the negotiated interval, in
microseconds, that the local system is transmitting microseconds, that the local system is transmitting
BFD Control packets." BFD Control packets."
::= { bfdSessEntry 25 } ::= { bfdSessEntry 26 }
bfdSessNegotiatedEchoInterval OBJECT-TYPE bfdSessNegotiatedEchoInterval OBJECT-TYPE
SYNTAX BfdInterval SYNTAX BfdInterval
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the negotiated interval, in "This object specifies the negotiated interval, in
microseconds, that the local system is transmitting microseconds, that the local system is transmitting
BFD echo packets. Value is expected to be zero if BFD echo packets. Value is expected to be zero if
the sessions is not running in echo mode." the sessions is not running in echo mode."
::= { bfdSessEntry 26 } ::= { bfdSessEntry 27 }
bfdSessNegotiatedDetectMult OBJECT-TYPE bfdSessNegotiatedDetectMult OBJECT-TYPE
SYNTAX Unsigned32 SYNTAX Unsigned32
MAX-ACCESS read-only MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object specifies the Detect time multiplier." "This object specifies the Detect time multiplier."
::= { bfdSessEntry 27 } ::= { bfdSessEntry 28 }
bfdSessAuthPresFlag OBJECT-TYPE bfdSessAuthPresFlag OBJECT-TYPE
SYNTAX TruthValue SYNTAX TruthValue
MAX-ACCESS read-create MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This object indicates that the local system's "This object indicates that the local system's
desire to use Authentication. Specifically, it is set desire to use Authentication. Specifically, it is set
to true(1) if the local system wishes the session to true(1) if the local system wishes the session
to be authenticated or false(2) if not." to be authenticated or false(2) if not."
REFERENCE REFERENCE
"draft-ietf-bfd-base-08, Sections 4.2 - 4.4" "draft-ietf-bfd-base-08, Sections 4.2 - 4.4"
DEFVAL { false } DEFVAL { false }
::= { bfdSessEntry 28 } ::= { bfdSessEntry 29 }
bfdSessAuthenticationType OBJECT-TYPE bfdSessAuthenticationType OBJECT-TYPE
SYNTAX INTEGER { SYNTAX INTEGER {
reserved(0), reserved(0),
simplePassword(1), simplePassword(1),
keyedMD5(2), keyedMD5(2),
meticulousKeyedMD5(3), meticulousKeyedMD5(3),
keyedSHA1(4), keyedSHA1(4),
meticulousKeyedSHA1(5) meticulousKeyedSHA1(5)
} }
MAX-ACCESS read-create MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The Authentication Type used for this BFD session. "The Authentication Type used for this BFD session.
This field is valid only when the Authentication This field is valid only when the Authentication
Present bit is set." Present bit is set."
REFERENCE REFERENCE
"draft-ietf-bfd-base-08, Sections 4.2 - 4.4" "draft-ietf-bfd-base-08, Sections 4.2 - 4.4"
::= { bfdSessEntry 29 } ::= { bfdSessEntry 30 }
bfdSessAuthenticationKeyID OBJECT-TYPE bfdSessAuthenticationKeyID OBJECT-TYPE
SYNTAX Integer32 (-1 | 0..255) SYNTAX Integer32 (-1 | 0..255)
MAX-ACCESS read-create MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The authentication key ID in use for this session. This "The authentication key ID in use for this session. This
object permits multiple keys to be active simultaneously. object permits multiple keys to be active simultaneously.
When bfdSessAuthPresFlag is false(2), then the value When bfdSessAuthPresFlag is false(2), then the value
of this object MUST be -1. The value -1 indicates that of this object MUST be -1. The value -1 indicates that
no Authentication Key ID will be present in the optional no Authentication Key ID will be present in the optional
BFD Authentication Section." BFD Authentication Section."
REFERENCE REFERENCE
"draft-ietf-bfd-base-08, Sections 4.2 - 4.4" "draft-ietf-bfd-base-08, Sections 4.2 - 4.4"
DEFVAL { -1 } DEFVAL { -1 }
::= { bfdSessEntry 30 } ::= { bfdSessEntry 31 }
bfdSessAuthenticationKey OBJECT-TYPE bfdSessAuthenticationKey OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..252)) SYNTAX OCTET STRING (SIZE (0..252))
MAX-ACCESS read-create MAX-ACCESS read-only
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The authentication key. When the "The authentication key. When the
bfdSessAuthenticationType is simplePassword(1), the value bfdSessAuthenticationType is simplePassword(1), the value
of this object is the password present in the BFD packets. of this object is the password present in the BFD packets.
When the bfdSessAuthentication type is one of the keyed When the bfdSessAuthentication type is one of the keyed
authentication types, this value is used in the authentication types, this value is used in the
computation of the key present in the BFD authentication computation of the key present in the BFD authentication
packet. packet."
Implementations may further restrict the length of this
key. When doing so, a SET of this object should return
tooBig.
Note that due to the highly sensitive nature of the data
managed by this object an implementation may choose to
implement this object as 'write-only'. SET operations
will succeed normally but GET and GET-BULK operations are
permitted to return noSuchName."
REFERENCE REFERENCE
"draft-ietf-bfd-base-08, Sections 4.2 - 4.4" "draft-ietf-bfd-base-08, Sections 4.2 - 4.4"
::= { bfdSessEntry 31 } ::= { bfdSessEntry 32 }
bfdSessStorType OBJECT-TYPE bfdSessStorType OBJECT-TYPE
SYNTAX StorageType SYNTAX StorageType
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This variable indicates the storage type for this "This variable indicates the storage type for this
object. Conceptual rows having the value object. Conceptual rows having the value
'permanent' need not allow write-access to any 'permanent' need not allow write-access to any
columnar objects in the row." columnar objects in the row."
::= { bfdSessEntry 32 } ::= { bfdSessEntry 33 }
bfdSessRowStatus OBJECT-TYPE bfdSessRowStatus OBJECT-TYPE
SYNTAX RowStatus SYNTAX RowStatus
MAX-ACCESS read-create MAX-ACCESS read-create
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This variable is used to create, modify, and/or "This variable is used to create, modify, and/or
delete a row in this table. When a row in this delete a row in this table. When a row in this
table has a row in the active(1) state, no table has a row in the active(1) state, no
objects in this row can be modified except the objects in this row can be modified except the
bfdSessRowStatus and bfdSessStorageType." bfdSessRowStatus and bfdSessStorageType."
::= { bfdSessEntry 33 } ::= { bfdSessEntry 34 }
-- BFD Session Performance Table -- BFD Session Performance Table
bfdSessPerfTable OBJECT-TYPE bfdSessPerfTable OBJECT-TYPE
SYNTAX SEQUENCE OF BfdSessPerfEntry SYNTAX SEQUENCE OF BfdSessPerfEntry
MAX-ACCESS not-accessible MAX-ACCESS not-accessible
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"This table specifies BFD Session performance counters." "This table specifies BFD Session performance counters."
::= { bfdObjects 3 } ::= { bfdObjects 3 }
skipping to change at page 21, line 39 skipping to change at page 21, line 51
bfdSessIpMapTable OBJECT-TYPE bfdSessIpMapTable OBJECT-TYPE
SYNTAX SEQUENCE OF BfdSessIpMapEntry SYNTAX SEQUENCE OF BfdSessIpMapEntry
MAX-ACCESS not-accessible MAX-ACCESS not-accessible
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The BFD Session IP Mapping Table maps given "The BFD Session IP Mapping Table maps given
bfdSessInterface, bfdSessAddrType, and bfdSessAddr bfdSessInterface, bfdSessAddrType, and bfdSessAddr
to an associated BFD sessions' BfdSessIndexTC used in to an associated BFD sessions' BfdSessIndexTC used in
the bfdSessionTable. This table SHOULD contains those the bfdSessionTable. This table SHOULD contains those
BFD sessions are of IP type: SingleHop(1) and BFD sessions of singleHop(1) type."
MultiHop(2)."
::= { bfdObjects 5 } ::= { bfdObjects 5 }
bfdSessIpMapEntry OBJECT-TYPE bfdSessIpMapEntry OBJECT-TYPE
SYNTAX BfdSessIpMapEntry SYNTAX BfdSessIpMapEntry
MAX-ACCESS not-accessible MAX-ACCESS not-accessible
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"The BFD Session IP Map Entry describes "The BFD Session IP Map Entry describes
BFD session that is mapped to this BfdSessIndexTC." BFD session that is mapped to this BfdSessIndexTC."
INDEX { INDEX {
skipping to change at page 25, line 19 skipping to change at page 25, line 31
bfdSessInterface, bfdSessInterface,
bfdSessAddrType, bfdSessAddrType,
bfdSessAddr, bfdSessAddr,
bfdSessGTSM, bfdSessGTSM,
bfdSessGTSMTTL, bfdSessGTSMTTL,
bfdSessDesiredMinTxInterval, bfdSessDesiredMinTxInterval,
bfdSessReqMinRxInterval, bfdSessReqMinRxInterval,
bfdSessReqMinEchoRxInterval, bfdSessReqMinEchoRxInterval,
bfdSessDetectMult, bfdSessDetectMult,
bfdSessStorType, bfdSessStorType,
bfdSessRowStatus, bfdSessRowStatus
bfdSessAuthPresFlag,
bfdSessAuthenticationType,
bfdSessAuthenticationKeyID,
bfdSessAuthenticationKey
} }
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"Collection of objects needed for BFD sessions." "Collection of objects needed for BFD sessions."
::= { bfdGroups 1 } ::= { bfdGroups 1 }
bfdSessionReadOnlyGroup OBJECT-GROUP bfdSessionReadOnlyGroup OBJECT-GROUP
OBJECTS { OBJECTS {
bfdSessType, bfdSessType,
bfdSessMultiHopUniLinkMode,
bfdSessDiscriminator, bfdSessDiscriminator,
bfdSessRemoteDiscr, bfdSessRemoteDiscr,
bfdSessDestinationUdpPort, bfdSessDestinationUdpPort,
bfdSessState, bfdSessState,
bfdSessRemoteHeardFlag, bfdSessRemoteHeardFlag,
bfdSessOperMode, bfdSessOperMode,
bfdSessControlPlaneIndepFlag, bfdSessControlPlaneIndepFlag,
bfdSessNegotiatedInterval, bfdSessNegotiatedInterval,
bfdSessNegotiatedEchoInterval, bfdSessNegotiatedEchoInterval,
bfdSessNegotiatedDetectMult, bfdSessNegotiatedDetectMult,
bfdSessAuthPresFlag,
bfdSessAuthenticationType,
bfdSessAuthenticationKeyID,
bfdSessAuthenticationKey,
bfdSessDiscMapIndex, bfdSessDiscMapIndex,
bfdSessIpMapIndex bfdSessIpMapIndex
} }
STATUS current STATUS current
DESCRIPTION DESCRIPTION
"Collection of read-only objects needed for BFD sessions." "Collection of read-only objects needed for BFD sessions."
::= { bfdGroups 2 } ::= { bfdGroups 2 }
bfdSessionPerfGroup OBJECT-GROUP bfdSessionPerfGroup OBJECT-GROUP
OBJECTS { OBJECTS {
skipping to change at page 28, line 14 skipping to change at page 28, line 25
o The bfdSessPerfTable both allows access to the performance o The bfdSessPerfTable both allows access to the performance
characteristics of BFD sessions. Network administrators not characteristics of BFD sessions. Network administrators not
wishing to show this information should consider this table wishing to show this information should consider this table
sensitive. sensitive.
The bfdSessAuthenticationType, bfdSessAuthenticationKeyID, and The bfdSessAuthenticationType, bfdSessAuthenticationKeyID, and
bfdSessAuthenticationKey objects hold security methods and associated bfdSessAuthenticationKey objects hold security methods and associated
security keys of BFD sessions. These objects SHOULD be considered security keys of BFD sessions. These objects SHOULD be considered
highly sensitive objects. In order for these sensitive information highly sensitive objects. In order for these sensitive information
from being improperly accessed, implementors MAY wish to allow only from being improperly accessed, implementors MAY wish to disallow
write-only access to these objects. Even in such case, SET read access to these objects.
operations SHOULD be performed with security features.
SNMP versions prior to SNMPv3 did not include adequate security. SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure "for example by using IPSec", 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 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 allowed to access and GET/SET "read/change/create/delete" the objects
in these MIB modules. in these MIB modules.
It is RECOMMENDED that implementers consider the security features as It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework "see [RFC3410], section 8", provided by the SNMPv3 framework "see [RFC3410], section 8",
including full support for the SNMPv3 cryptographic mechanisms "for including full support for the SNMPv3 cryptographic mechanisms "for
skipping to change at page 29, line 17 skipping to change at page 29, line 28
BfdDiag object. BfdDiag object.
9. References 9. References
9.1. Normative References 9.1. Normative References
[BFD] Katz, D. and D. Ward, "Bidirectional Forwarding [BFD] Katz, D. and D. Ward, "Bidirectional Forwarding
Detection", ID Document: draft-ietf-bfd-base-08.txt, Detection", ID Document: draft-ietf-bfd-base-08.txt,
March 2008. March 2008.
[BFD-LSP] Aggarwal, R., Kompella, K., Nadeau, T., and G. Swallow, [BFD-1HOP]
"BFD For MPLS LSPs", ID Document: Katz, D. and D. Ward, "BFD for IPv4 and IPv6 (Single
draft-ietf-bfd-mpls-06.txt, June 2008. Hop)", ID Document: draft-ietf-bfd-v4v6-1hop-08.txt,
March 2008.
[BFD-MH] Katz, D. and D. Ward, "BFD for Multihop Paths", [BFD-MH] Katz, D. and D. Ward, "BFD for Multihop Paths",
ID Document: draft-ietf-bfd-multihop-06.txt, January 2008. ID Document: draft-ietf-bfd-multihop-06.txt, January 2008.
[RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J. [RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Structure of Management Information Schoenwaelder, Ed., "Structure of Management Information
Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J. [RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Textual Conventions for SMIv2", Schoenwaelder, Ed., "Textual Conventions for SMIv2",
 End of changes. 57 change blocks. 
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