💾 Archived View for gemini.bortzmeyer.org › rfc-mirror › rfc1850.txt captured on 2024-02-05 at 12:25:25.
⬅️ Previous capture (2021-11-30)
-=-=-=-=-=-=-
Network Working Group F. Baker
Request For Comments: 1850 Cisco Systems
Obsoletes: 1253 R. Coltun
Category: Standards Track RainbowBridge Communications
November 1995
OSPF Version 2 Management Information Base
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.
Abstract
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in TCP/IP-based internets.
In particular, it defines objects for managing the Open Shortest Path
First Routing Protocol.
Table of Contents
1. The SNMPv2 Network Management Framework .............. 2
1.1 Object Definitions .................................. 3
2. Overview ............................................. 3
2.1 Changes from RFC 1253 ............................... 3
2.2 Textual Conventions ................................. 6
2.3 Structure of MIB .................................... 6
2.3.1 General Variables ................................. 6
2.3.2 Area Data Structure and Area Stub Metric Table .... 7
2.3.3 Link State Database and External Link State
Database .......................................... 7
2.3.4 Address Table and Host Tables ..................... 7
2.3.5 Interface and Interface Metric Tables ............. 7
2.3.6 Virtual Interface Table ........................... 7
2.3.7 Neighbor and Virtual Neighbor Tables .............. 7
2.4 Conceptual Row Creation ............................. 7
2.5 Default Configuration ............................... 8
3. Definitions .......................................... 10
3.1 OSPF General Variables .............................. 13
3.2 OSPF Area Table ..................................... 17
Baker & Coltun Standards Track [Page 1]
RFC 1850 OSPF MIB November 1995
3.3 OSPF Area Default Metrics ........................... 21
3.4 OSPF Link State Database ............................ 25
3.5 OSPF Address Range Table ............................ 27
3.6 OSPF Host Table ..................................... 29
3.7 OSPF Interface Table ................................ 32
3.8 OSPF Interface Metrics .............................. 39
3.9 OSPF Virtual Interface Table ........................ 42
3.10 OSPF Neighbor Table ................................ 46
3.11 OSPF Virtual Neighbor Table ........................ 51
3.12 OSPF External Link State Database .................. 54
3.13 OSPF Route Table Use ............................... 57
3.14 OSPF Area Aggregate Table .......................... 58
4. OSPF Traps ........................................... 66
4.1 Format Of Trap Definitions .......................... 67
4.2 Approach ............................................ 67
4.3 Ignoring Initial Activity ........................... 67
4.4 Throttling Traps .................................... 67
4.5 One Trap Per OSPF Event ............................. 68
4.6 Polling Event Counters .............................. 68
5. OSPF Trap Definitions ................................ 69
5.1 Trap Support Objects ................................ 69
5.2 Traps ............................................... 71
6. Acknowledgements ...................................... 78
7. References ............................................ 78
8. Security Considerations ............................... 80
9. Authors' Addresses .................................... 80
1. The SNMPv2 Network Management Framework
The SNMPv2 Network Management Framework consists of four major
components. They are:
o RFC 1441 which defines the SMI, the mechanisms used for
describing and naming objects for the purpose of
management.
o STD 17, RFC 1213 defines MIB-II, the core set of managed objects
for the Internet suite of protocols.
o RFC 1445 which defines the administrative and other
architectural aspects of the framework.
o RFC 1448 which defines the protocol used for network
access to managed objects.
The Framework permits new objects to be defined for the purpose of
experimentation and evaluation.
Baker & Coltun Standards Track [Page 2]
RFC 1850 OSPF MIB November 1995
1.1. Object Definitions
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the subset of Abstract Syntax Notation One (ASN.1)
defined in the SMI. In particular, each object object type is named
by an OBJECT IDENTIFIER, an administratively assigned name. The
object type together with an object instance serves to uniquely
identify a specific instantiation of the object. For human
convenience, we often use a textual string, termed the descriptor, to
refer to the object type.
2. Overview
2.1. Changes from RFC 1253
The changes from RFC 1253 are the following:
(1) The textual convention PositiveInteger was changed from
1..'FFFFFFFF'h to 1..'7FFFFFFF'h at the request of
Marshall Rose.
(2) The textual convention TOSType was changed to reflect the
TOS values defined in the Router Requirements Draft, and
in accordance with the IP Forwarding Table MIB's values.
(3) The names of some objects were changed, conforming to the
convention that an acronym (for example, LSA) is a single
word ("Lsa") in most SNMP names.
(4) textual changes were made to make the MIB readable by
Dave Perkins' SMIC MIB Compiler in addition to Mosy.
This involved changing the case of some characters in
certain names and removing the DEFVAL clauses for
Counters.
(5) The variables ospfAreaStatus and ospfIfStatus were added,
having been overlooked in the original MIB.
(6) The range of the variable ospfLsdbType was extended to
include multicastLink (Group-membership LSA) and
nssaExternalLink (NSSA LSA).
(7) The variable ospfIfMetricMetric was renamed
ospfIfMetricValue, and the following text was removed
from its description:
"The value FFFF is distinguished to mean 'no route via
Baker & Coltun Standards Track [Page 3]
RFC 1850 OSPF MIB November 1995
this TOS'."
(8) The variable ospfNbmaNbrPermanence was added, with the
values 'dynamic' and 'permanent'; by this means,
dynamically learned and configured neighbors can be
distinguished.
(9) The DESCRIPTION of the variable ospfNbrIpAddr was changed
from
"The IP address of this neighbor."
to
"The IP address this neighbor is using in its IP Source
Address. Note that, on addressless links, this will not
be 0.0.0.0, but the address of another of the neighbor's
interfaces."
This is by way of clarification and does not change the
specification.
(10) The OSPF External Link State Database was added. The
OSPF Link State Database used to display all LSAs stored;
in this MIB, it displays all but the AS External LSAs.
This is because there are usually a large number of
External LSAs, and they are relicated in all non-Stub
Areas.
(11) The variable ospfAreaSummary was added to control the
import of summary LSAs into stub areas. If it is
noAreaSummary (default) the router will neither originate
nor propagate summary LSAs into the stub area. It will
rely entirely on its default route. If it is
sendAreaSummary, the router will both summarize and
propagate summary LSAs.
(12) The general variables ospfExtLsdbLimit and
ExitOverflowInterval were introduced to help handle LSDB
overflow.
(13) The use of the IP Forwarding Table is defined.
(14) The ospfAreaRangeTable was obsoleted and replaced with
the ospfAreaAggregateTable to accommodate two additional
indexes. The ospfAreaAggregateEntry keys now include a
LsdbType (which can be used to differentiate between the
traditional type-3 Aggregates and NSSA Aggregates) and an
Baker & Coltun Standards Track [Page 4]
RFC 1850 OSPF MIB November 1995
ospfAreaAggregateMask (which will more clearly express
the range).
(15) The variable ospfAreaAggregateEffect was added. This
permits the network manager to hide a subnet within an
area.
(16) Normally, the border router of a stub area advertises a
default route as an OSPF network summary. An NSSA border
router will generate a type-7 LSA indicating a default
route, and import it into the NSSA. ospfStubMetricType
(ospf internal, type 1 external, or type 2 external)
indicates the type of the default metric advertised.
(17) ospfMulticastExtensions is added to the OSPF General
Group. This indicates the router's ability to forward IP
multicast (Class D) datagrams.
(18) ospfIfMulticastForwarding is added to the Interface
Group. It indicates whether, and if so, how, multicasts
should be forwarded on the interface.
(19) The MIB is converted to SNMP Version 2. Beyond simple
text changes and the addition of the MODULE-IDENTITY and
MODULE-COMPLIANCE macros, this involved trading the
TruthValue Textual Convention for SNMP Version 2's, which
has the same values, and trading the Validation Textual
Convention for SNMP Version 2's RowStatus.
(20) ospfAuthType (area authentication type) was changed to an
interface authentication type to match the key. It also
has an additional value, to indicate the use of MD5 for
authentication.
(21) ospfIfIntfType has a new value, pointToMultipoint.
(22) ospfIfDemand (read/write) is added, to permit control of
Demand OSPF features.
(23) ospfNbrHelloSuppressed and ospfVirtNbrHelloSuppressed
were added, (read only). They indicate whether Hellos are
being suppressed to the neighbor.
(24) ospfDemandExtensions was added to indicate whether the
Demand OSPF extensions have been implemented, and to
disable them if appropriate.
Baker & Coltun Standards Track [Page 5]
RFC 1850 OSPF MIB November 1995
2.2. Textual Conventions
Several new data types are introduced as a textual convention in this
MIB document. These textual conventions enhance the readability of
the specification and can ease comparison with other specifications
if appropriate. It should be noted that the introduction of the
these textual conventions has no effect on either the syntax nor the
semantics of any managed objects. The use of these is merely an
artifact of the explanatory method used. Objects defined in terms of
one of these methods are always encoded by means of the rules that
define the primitive type. Hence, no changes to the SMI or the SNMP
are necessary to accommodate these textual conventions which are
adopted merely for the convenience of readers and writers in pursuit
of the elusive goal of clear, concise, and unambiguous MIB documents.
The new data types are AreaID, RouterID, TOSType, Metric, BigMetric,
Status, PositiveInteger, HelloRange, UpToMaxAge, InterfaceIndex, and
DesignatedRouterPriority.
2.3. Structure of MIB
The MIB is composed of the following sections:
General Variables
Area Data Structure
Area Stub Metric Table
Link State Database
Address Range Table
Host Table
Interface Table
Interface Metric Table
Virtual Interface Table
Neighbor Table
Virtual Neighbor Table
External Link State Database
Aggregate Range Table
There exists a separate MIB for notifications ("traps"), which is
entirely optional.
2.3.1. General Variables
The General Variables are about what they sound like; variables which
are global to the OSPF Process.
Baker & Coltun Standards Track [Page 6]
RFC 1850 OSPF MIB November 1995
2.3.2. Area Data Structure and Area Stub Metric Table
The Area Data Structure describes the OSPF Areas that the router
participates in. The Area Stub Metric Table describes the metrics
advertised into a stub area by the default router(s).
2.3.3. Link State Database and External Link State Database
The Link State Database is provided primarily to provide detailed
information for network debugging.
2.3.4. Address Table and Host Tables
The Address Range Table and Host Table are provided to view
configured Network Summary and Host Route information.
2.3.5. Interface and Interface Metric Tables
The Interface Table and the Interface Metric Table together describe
the various IP interfaces to OSPF. The metrics are placed in
separate tables in order to simplify dealing with multiple types of
service, and to provide flexibility in the event that the IP TOS
definition is changed in the future. A Default Value specification
is supplied for the TOS 0 (default) metric.
2.3.6. Virtual Interface Table
Likewise, the Virtual Interface Table describe virtual links to the
OSPF Process.
2.3.7. Neighbor and Virtual Neighbor Tables
The Neighbor Table and the Virtual Neighbor Table describe the
neighbors to the OSPF Process.
2.4. Conceptual Row Creation
For the benefit of row-creation in "conceptual" (see [9]) tables,
DEFVAL (Default Value) clauses are included in the definitions in
section 3, suggesting values which an agent should use for instances
of variables which need to be created due to a Set-Request, but which
are not specified in the Set-Request. DEFVAL clauses have not been
specified for some objects which are read-only, implying that they
are zeroed upon row creation. These objects are of the SYNTAX
Counter32 or Gauge32.
For those objects not having a DEFVAL clause, both management
stations and agents should heed the Robustness Principle of the
Baker & Coltun Standards Track [Page 7]
RFC 1850 OSPF MIB November 1995
Internet (see RFC-791):
"be liberal in what you accept, conservative in what you
send"
That is, management stations should include as many of these columnar
objects as possible (e.g., all read-write objects) in a Set-Request
when creating a conceptual row; agents should accept a Set-Request
with as few of these as they need (e.g., the minimum contents of a
row creating SET consists of those objects for which, as they cannot
be intuited, no default is specified.).
There are numerous read-write objects in this MIB, as it is designed
for SNMP management of the protocol, not just SNMP monitoring of its
state. However, in the absence of a standard SNMP Security
architecture, it is acceptable for implementations to implement these
as read-only with an alternative interface for their modification.
2.5. Default Configuration
OSPF is a powerful routing protocol, equipped with features to handle
virtually any configuration requirement that might reasonably be
found within an Autonomous System. With this power comes a fair
degree of complexity, which the sheer number of objects in the MIB
will attest to. Care has therefore been taken, in constructing this
MIB, to define default values for virtually every object, to minimize
the amount of parameterization required in the typical case. That
default configuration is as follows:
Given the following assumptions:
- IP has already been configured
- The ifTable has already been configured
- ifSpeed is estimated by the interface drivers
- The OSPF Process automatically discovers all IP
Interfaces and creates corresponding OSPF Interfaces
- The TOS 0 metrics are autonomously derived from ifSpeed
- The OSPF Process automatically creates the Areas required
for the Interfaces
The simplest configuration of an OSPF process requires that:
- The OSPF Process be Enabled.
Baker & Coltun Standards Track [Page 8]
RFC 1850 OSPF MIB November 1995
This can be accomplished with a single SET:
ospfAdminStat := enabled.
The configured system will have the following attributes:
- The RouterID will be one of the IP addresses of the
device
- The device will be neither an Area Border Router nor an
Autonomous System Border Router.
- Every IP Interface, with or without an address, will be
an OSPF Interface.
- The AreaID of each interface will be 0.0.0.0, the
Backbone.
- Authentication will be disabled
- All Broadcast and Point to Point interfaces will be
operational. NBMA Interfaces require the configuration
of at least one neighbor.
- Timers on all direct interfaces will be:
Hello Interval: 10 seconds
Dead Timeout: 40 Seconds
Retransmission: 5 Seconds
Transit Delay: 1 Second
Poll Interval: 120 Seconds
- no direct links to hosts will be configured.
- no addresses will be summarized
- Metrics, being a measure of bit duration, are unambiguous
and intelligent.
- No Virtual Links will be configured.
Baker & Coltun Standards Track [Page 9]
RFC 1850 OSPF MIB November 1995
3. Definitions
OSPF-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Counter32, Gauge32,
Integer32, IpAddress
FROM SNMPv2-SMI
TEXTUAL-CONVENTION, TruthValue, RowStatus
FROM SNMPv2-TC
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
mib-2 FROM RFC1213-MIB;
-- This MIB module uses the extended OBJECT-TYPE macro as
-- defined in [9].
ospf MODULE-IDENTITY
LAST-UPDATED "9501201225Z" -- Fri Jan 20 12:25:50 PST 1995
ORGANIZATION "IETF OSPF Working Group"
CONTACT-INFO
" Fred Baker
Postal: Cisco Systems
519 Lado Drive
Santa Barbara, California 93111
Tel: +1 805 681 0115
E-Mail: fred@cisco.com
Rob Coltun
Postal: RainbowBridge Communications
Tel: (301) 340-9416
E-Mail: rcoltun@rainbow-bridge.com"
DESCRIPTION
"The MIB module to describe the OSPF Version 2
Protocol"
::= { mib-2 14 }
-- The Area ID, in OSPF, has the same format as an IP Address,
-- but has the function of defining a summarization point for
-- Link State Advertisements
AreaID ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"An OSPF Area Identifier."
SYNTAX IpAddress
-- The Router ID, in OSPF, has the same format as an IP Address,
Baker & Coltun Standards Track [Page 10]
RFC 1850 OSPF MIB November 1995
-- but identifies the router independent of its IP Address.
RouterID ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"A OSPF Router Identifier."
SYNTAX IpAddress
-- The OSPF Metric is defined as an unsigned value in the range
Metric ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The OSPF Internal Metric."
SYNTAX Integer32 (0..'FFFF'h)
BigMetric ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The OSPF External Metric."
SYNTAX Integer32 (0..'FFFFFF'h)
-- Status Values
Status ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The status of an interface: 'enabled' indicates that
it is willing to communicate with other OSPF Routers,
while 'disabled' indicates that it is not."
SYNTAX INTEGER { enabled (1), disabled (2) }
-- Time Durations measured in seconds
PositiveInteger ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"A positive integer. Values in excess are precluded as
unnecessary and prone to interoperability issues."
SYNTAX Integer32 (0..'7FFFFFFF'h)
HelloRange ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The range of intervals on which hello messages are
exchanged."
SYNTAX Integer32 (1..'FFFF'h)
Baker & Coltun Standards Track [Page 11]
RFC 1850 OSPF MIB November 1995
UpToMaxAge ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The values that one might find or configure for
variables bounded by the maximum age of an LSA."
SYNTAX Integer32 (0..3600)
-- The range of ifIndex
InterfaceIndex ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The range of ifIndex."
SYNTAX Integer32
-- Potential Priorities for the Designated Router Election
DesignatedRouterPriority ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The values defined for the priority of a system for
becoming the designated router."
SYNTAX Integer32 (0..'FF'h)
TOSType ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Type of Service is defined as a mapping to the IP Type of
Service Flags as defined in the IP Forwarding Table MIB
+-----+-----+-----+-----+-----+-----+-----+-----+
| | | |
| PRECEDENCE | TYPE OF SERVICE | 0 |
| | | |
+-----+-----+-----+-----+-----+-----+-----+-----+
IP TOS IP TOS
Field Policy Field Policy
Contents Code Contents Code
0 0 0 0 ==> 0 0 0 0 1 ==> 2
0 0 1 0 ==> 4 0 0 1 1 ==> 6
0 1 0 0 ==> 8 0 1 0 1 ==> 10
0 1 1 0 ==> 12 0 1 1 1 ==> 14
1 0 0 0 ==> 16 1 0 0 1 ==> 18
1 0 1 0 ==> 20 1 0 1 1 ==> 22
Baker & Coltun Standards Track [Page 12]
RFC 1850 OSPF MIB November 1995
1 1 0 0 ==> 24 1 1 0 1 ==> 26
1 1 1 0 ==> 28 1 1 1 1 ==> 30
The remaining values are left for future definition."
SYNTAX Integer32 (0..30)
-- OSPF General Variables
-- These parameters apply globally to the Router's
-- OSPF Process.
ospfGeneralGroup OBJECT IDENTIFIER ::= { ospf 1 }
ospfRouterId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A 32-bit integer uniquely identifying the
router in the Autonomous System.
By convention, to ensure uniqueness, this
should default to the value of one of the
router's IP interface addresses."
REFERENCE
"OSPF Version 2, C.1 Global parameters"
::= { ospfGeneralGroup 1 }
ospfAdminStat OBJECT-TYPE
SYNTAX Status
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The administrative status of OSPF in the
router. The value 'enabled' denotes that the
OSPF Process is active on at least one inter-
face; 'disabled' disables it on all inter-
faces."
::= { ospfGeneralGroup 2 }
ospfVersionNumber OBJECT-TYPE
SYNTAX INTEGER { version2 (2) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
Baker & Coltun Standards Track [Page 13]
RFC 1850 OSPF MIB November 1995
"The current version number of the OSPF proto-
col is 2."
REFERENCE
"OSPF Version 2, Title"
::= { ospfGeneralGroup 3 }
ospfAreaBdrRtrStatus OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A flag to note whether this router is an area
border router."
REFERENCE
"OSPF Version 2, Section 3 Splitting the AS into
Areas"
::= { ospfGeneralGroup 4 }
ospfASBdrRtrStatus OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A flag to note whether this router is config-
ured as an Autonomous System border router."
REFERENCE
"OSPF Version 2, Section 3.3 Classification of
routers"
::= { ospfGeneralGroup 5 }
ospfExternLsaCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of external (LS type 5) link-state
advertisements in the link-state database."
REFERENCE
"OSPF Version 2, Appendix A.4.5 AS external link
advertisements"
::= { ospfGeneralGroup 6 }
ospfExternLsaCksumSum OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
Baker & Coltun Standards Track [Page 14]
RFC 1850 OSPF MIB November 1995
STATUS current
DESCRIPTION
"The 32-bit unsigned sum of the LS checksums of
the external link-state advertisements con-
tained in the link-state database. This sum
can be used to determine if there has been a
change in a router's link state database, and
to compare the link-state database of two
routers."
::= { ospfGeneralGroup 7 }
ospfTOSSupport OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The router's support for type-of-service rout-
ing."
REFERENCE
"OSPF Version 2, Appendix F.1.2 Optional TOS
support"
::= { ospfGeneralGroup 8 }
ospfOriginateNewLsas OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of new link-state advertisements
that have been originated. This number is in-
cremented each time the router originates a new
LSA."
::= { ospfGeneralGroup 9 }
ospfRxNewLsas OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of link-state advertisements re-
ceived determined to be new instantiations.
This number does not include newer instantia-
tions of self-originated link-state advertise-
ments."
::= { ospfGeneralGroup 10 }
Baker & Coltun Standards Track [Page 15]
RFC 1850 OSPF MIB November 1995
ospfExtLsdbLimit OBJECT-TYPE
SYNTAX Integer32 (-1..'7FFFFFFF'h)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The maximum number of non-default AS-
external-LSAs entries that can be stored in the
link-state database. If the value is -1, then
there is no limit.
When the number of non-default AS-external-LSAs
in a router's link-state database reaches
ospfExtLsdbLimit, the router enters Overflow-
State. The router never holds more than
ospfExtLsdbLimit non-default AS-external-LSAs
in its database. OspfExtLsdbLimit MUST be set
identically in all routers attached to the OSPF
backbone and/or any regular OSPF area. (i.e.,
OSPF stub areas and NSSAs are excluded)."
DEFVAL { -1 }
::= { ospfGeneralGroup 11 }
ospfMulticastExtensions OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A Bit Mask indicating whether the router is
forwarding IP multicast (Class D) datagrams
based on the algorithms defined in the Multi-
cast Extensions to OSPF.
Bit 0, if set, indicates that the router can
forward IP multicast datagrams in the router's
directly attached areas (called intra-area mul-
ticast routing).
Bit 1, if set, indicates that the router can
forward IP multicast datagrams between OSPF
areas (called inter-area multicast routing).
Bit 2, if set, indicates that the router can
forward IP multicast datagrams between Auto-
nomous Systems (called inter-AS multicast rout-
ing).
Only certain combinations of bit settings are
allowed, namely: 0 (no multicast forwarding is
Baker & Coltun Standards Track [Page 16]
RFC 1850 OSPF MIB November 1995
enabled), 1 (intra-area multicasting only), 3
(intra-area and inter-area multicasting), 5
(intra-area and inter-AS multicasting) and 7
(multicasting everywhere). By default, no mul-
ticast forwarding is enabled."
DEFVAL { 0 }
::= { ospfGeneralGroup 12 }
ospfExitOverflowInterval OBJECT-TYPE
SYNTAX PositiveInteger
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The number of seconds that, after entering
OverflowState, a router will attempt to leave
OverflowState. This allows the router to again
originate non-default AS-external-LSAs. When
set to 0, the router will not leave Overflow-
State until restarted."
DEFVAL { 0 }
::= { ospfGeneralGroup 13 }
ospfDemandExtensions OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The router's support for demand routing."
REFERENCE
"OSPF Version 2, Appendix on Demand Routing"
::= { ospfGeneralGroup 14 }
-- The OSPF Area Data Structure contains information
-- regarding the various areas. The interfaces and
-- virtual links are configured as part of these areas.
-- Area 0.0.0.0, by definition, is the Backbone Area
ospfAreaTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfAreaEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information describing the configured parame-
ters and cumulative statistics of the router's
attached areas."
Baker & Coltun Standards Track [Page 17]
RFC 1850 OSPF MIB November 1995
REFERENCE
"OSPF Version 2, Section 6 The Area Data Struc-
ture"
::= { ospf 2 }
ospfAreaEntry OBJECT-TYPE
SYNTAX OspfAreaEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information describing the configured parame-
ters and cumulative statistics of one of the
router's attached areas."
INDEX { ospfAreaId }
::= { ospfAreaTable 1 }
OspfAreaEntry ::=
SEQUENCE {
ospfAreaId
AreaID,
ospfAuthType
Integer32,
ospfImportAsExtern
INTEGER,
ospfSpfRuns
Counter32,
ospfAreaBdrRtrCount
Gauge32,
ospfAsBdrRtrCount
Gauge32,
ospfAreaLsaCount
Gauge32,
ospfAreaLsaCksumSum
Integer32,
ospfAreaSummary
INTEGER,
ospfAreaStatus
RowStatus
}
ospfAreaId OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A 32-bit integer uniquely identifying an area.
Area ID 0.0.0.0 is used for the OSPF backbone."
Baker & Coltun Standards Track [Page 18]
RFC 1850 OSPF MIB November 1995
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaEntry 1 }
ospfAuthType OBJECT-TYPE
SYNTAX Integer32
-- none (0),
-- simplePassword (1)
-- md5 (2)
-- reserved for specification by IANA (> 2)
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"The authentication type specified for an area.
Additional authentication types may be assigned
locally on a per Area basis."
REFERENCE
"OSPF Version 2, Appendix E Authentication"
DEFVAL { 0 } -- no authentication, by default
::= { ospfAreaEntry 2 }
ospfImportAsExtern OBJECT-TYPE
SYNTAX INTEGER {
importExternal (1),
importNoExternal (2),
importNssa (3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The area's support for importing AS external
link- state advertisements."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
DEFVAL { importExternal }
::= { ospfAreaEntry 3 }
ospfSpfRuns OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times that the intra-area route
table has been calculated using this area's
link-state database. This is typically done
using Dijkstra's algorithm."
Baker & Coltun Standards Track [Page 19]
RFC 1850 OSPF MIB November 1995
::= { ospfAreaEntry 4 }
ospfAreaBdrRtrCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of area border routers reach-
able within this area. This is initially zero,
and is calculated in each SPF Pass."
::= { ospfAreaEntry 5 }
ospfAsBdrRtrCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of Autonomous System border
routers reachable within this area. This is
initially zero, and is calculated in each SPF
Pass."
::= { ospfAreaEntry 6 }
ospfAreaLsaCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of link-state advertisements
in this area's link-state database, excluding
AS External LSA's."
::= { ospfAreaEntry 7 }
ospfAreaLsaCksumSum OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 32-bit unsigned sum of the link-state ad-
vertisements' LS checksums contained in this
area's link-state database. This sum excludes
external (LS type 5) link-state advertisements.
The sum can be used to determine if there has
been a change in a router's link state data-
base, and to compare the link-state database of
Baker & Coltun Standards Track [Page 20]
RFC 1850 OSPF MIB November 1995
two routers."
DEFVAL { 0 }
::= { ospfAreaEntry 8 }
ospfAreaSummary OBJECT-TYPE
SYNTAX INTEGER {
noAreaSummary (1),
sendAreaSummary (2)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The variable ospfAreaSummary controls the im-
port of summary LSAs into stub areas. It has
no effect on other areas.
If it is noAreaSummary, the router will neither
originate nor propagate summary LSAs into the
stub area. It will rely entirely on its de-
fault route.
If it is sendAreaSummary, the router will both
summarize and propagate summary LSAs."
DEFVAL { noAreaSummary }
::= { ospfAreaEntry 9 }
ospfAreaStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfAreaEntry 10 }
-- OSPF Area Default Metric Table
-- The OSPF Area Default Metric Table describes the metrics
-- that a default Area Border Router will advertise into a
-- Stub area.
ospfStubAreaTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfStubAreaEntry
Baker & Coltun Standards Track [Page 21]
RFC 1850 OSPF MIB November 1995
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The set of metrics that will be advertised by
a default Area Border Router into a stub area."
REFERENCE
"OSPF Version 2, Appendix C.2, Area Parameters"
::= { ospf 3 }
ospfStubAreaEntry OBJECT-TYPE
SYNTAX OspfStubAreaEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The metric for a given Type of Service that
will be advertised by a default Area Border
Router into a stub area."
REFERENCE
"OSPF Version 2, Appendix C.2, Area Parameters"
INDEX { ospfStubAreaId, ospfStubTOS }
::= { ospfStubAreaTable 1 }
OspfStubAreaEntry ::=
SEQUENCE {
ospfStubAreaId
AreaID,
ospfStubTOS
TOSType,
ospfStubMetric
BigMetric,
ospfStubStatus
RowStatus,
ospfStubMetricType
INTEGER
}
ospfStubAreaId OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 32 bit identifier for the Stub Area. On
creation, this can be derived from the in-
stance."
::= { ospfStubAreaEntry 1 }
Baker & Coltun Standards Track [Page 22]
RFC 1850 OSPF MIB November 1995
ospfStubTOS OBJECT-TYPE
SYNTAX TOSType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Type of Service associated with the
metric. On creation, this can be derived from
the instance."
::= { ospfStubAreaEntry 2 }
ospfStubMetric OBJECT-TYPE
SYNTAX BigMetric
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The metric value applied at the indicated type
of service. By default, this equals the least
metric at the type of service among the inter-
faces to other areas."
::= { ospfStubAreaEntry 3 }
ospfStubStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfStubAreaEntry 4 }
ospfStubMetricType OBJECT-TYPE
SYNTAX INTEGER {
ospfMetric (1), -- OSPF Metric
comparableCost (2), -- external type 1
nonComparable (3) -- external type 2
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the type of metric ad-
vertised as a default route."
DEFVAL { ospfMetric }
::= { ospfStubAreaEntry 5 }
Baker & Coltun Standards Track [Page 23]
RFC 1850 OSPF MIB November 1995
-- OSPF Link State Database
-- The Link State Database contains the Link State
-- Advertisements from throughout the areas that the
-- device is attached to.
ospfLsdbTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfLsdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The OSPF Process's Link State Database."
REFERENCE
"OSPF Version 2, Section 12 Link State Adver-
tisements"
::= { ospf 4 }
ospfLsdbEntry OBJECT-TYPE
SYNTAX OspfLsdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A single Link State Advertisement."
INDEX { ospfLsdbAreaId, ospfLsdbType,
ospfLsdbLsid, ospfLsdbRouterId }
::= { ospfLsdbTable 1 }
OspfLsdbEntry ::=
SEQUENCE {
ospfLsdbAreaId
AreaID,
ospfLsdbType
INTEGER,
ospfLsdbLsid
IpAddress,
ospfLsdbRouterId
RouterID,
ospfLsdbSequence
Integer32,
ospfLsdbAge
Integer32,
ospfLsdbChecksum
Integer32,
ospfLsdbAdvertisement
OCTET STRING
}
Baker & Coltun Standards Track [Page 24]
RFC 1850 OSPF MIB November 1995
ospfLsdbAreaId OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 32 bit identifier of the Area from which
the LSA was received."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfLsdbEntry 1 }
-- External Link State Advertisements are permitted
-- for backward compatibility, but should be displayed in
-- the ospfExtLsdbTable rather than here.
ospfLsdbType OBJECT-TYPE
SYNTAX INTEGER {
routerLink (1),
networkLink (2),
summaryLink (3),
asSummaryLink (4),
asExternalLink (5), -- but see ospfExtLsdbTable
multicastLink (6),
nssaExternalLink (7)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of the link state advertisement.
Each link state type has a separate advertise-
ment format."
REFERENCE
"OSPF Version 2, Appendix A.4.1 The Link State
Advertisement header"
::= { ospfLsdbEntry 2 }
ospfLsdbLsid OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Link State ID is an LS Type Specific field
containing either a Router ID or an IP Address;
it identifies the piece of the routing domain
that is being described by the advertisement."
REFERENCE
"OSPF Version 2, Section 12.1.4 Link State ID"
::= { ospfLsdbEntry 3 }
Baker & Coltun Standards Track [Page 25]
RFC 1850 OSPF MIB November 1995
ospfLsdbRouterId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 32 bit number that uniquely identifies the
originating router in the Autonomous System."
REFERENCE
"OSPF Version 2, Appendix C.1 Global parameters"
::= { ospfLsdbEntry 4 }
-- Note that the OSPF Sequence Number is a 32 bit signed
-- integer. It starts with the value '80000001'h,
-- or -'7FFFFFFF'h, and increments until '7FFFFFFF'h
-- Thus, a typical sequence number will be very negative.
ospfLsdbSequence OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sequence number field is a signed 32-bit
integer. It is used to detect old and dupli-
cate link state advertisements. The space of
sequence numbers is linearly ordered. The
larger the sequence number the more recent the
advertisement."
REFERENCE
"OSPF Version 2, Section 12.1.6 LS sequence
number"
::= { ospfLsdbEntry 5 }
ospfLsdbAge OBJECT-TYPE
SYNTAX Integer32 -- Should be 0..MaxAge
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This field is the age of the link state adver-
tisement in seconds."
REFERENCE
"OSPF Version 2, Section 12.1.1 LS age"
::= { ospfLsdbEntry 6 }
ospfLsdbChecksum OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
Baker & Coltun Standards Track [Page 26]
RFC 1850 OSPF MIB November 1995
DESCRIPTION
"This field is the checksum of the complete
contents of the advertisement, excepting the
age field. The age field is excepted so that
an advertisement's age can be incremented
without updating the checksum. The checksum
used is the same that is used for ISO connec-
tionless datagrams; it is commonly referred to
as the Fletcher checksum."
REFERENCE
"OSPF Version 2, Section 12.1.7 LS checksum"
::= { ospfLsdbEntry 7 }
ospfLsdbAdvertisement OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (1..65535))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The entire Link State Advertisement, including
its header."
REFERENCE
"OSPF Version 2, Section 12 Link State Adver-
tisements"
::= { ospfLsdbEntry 8 }
-- Address Range Table
-- The Address Range Table acts as an adjunct to the Area
-- Table; It describes those Address Range Summaries that
-- are configured to be propagated from an Area to reduce
-- the amount of information about it which is known beyond
-- its borders.
ospfAreaRangeTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfAreaRangeEntry
MAX-ACCESS not-accessible
STATUS obsolete
DESCRIPTION
"A range if IP addresses specified by an IP
address/IP network mask pair. For example,
class B address range of X.X.X.X with a network
mask of 255.255.0.0 includes all IP addresses
from X.X.0.0 to X.X.255.255"
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospf 5 }
Baker & Coltun Standards Track [Page 27]
RFC 1850 OSPF MIB November 1995
ospfAreaRangeEntry OBJECT-TYPE
SYNTAX OspfAreaRangeEntry
MAX-ACCESS not-accessible
STATUS obsolete
DESCRIPTION
"A range if IP addresses specified by an IP
address/IP network mask pair. For example,
class B address range of X.X.X.X with a network
mask of 255.255.0.0 includes all IP addresses
from X.X.0.0 to X.X.255.255"
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
INDEX { ospfAreaRangeAreaId, ospfAreaRangeNet }
::= { ospfAreaRangeTable 1 }
OspfAreaRangeEntry ::=
SEQUENCE {
ospfAreaRangeAreaId
AreaID,
ospfAreaRangeNet
IpAddress,
ospfAreaRangeMask
IpAddress,
ospfAreaRangeStatus
RowStatus,
ospfAreaRangeEffect
INTEGER
}
ospfAreaRangeAreaId OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
"The Area the Address Range is to be found
within."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaRangeEntry 1 }
ospfAreaRangeNet OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
"The IP Address of the Net or Subnet indicated
by the range."
Baker & Coltun Standards Track [Page 28]
RFC 1850 OSPF MIB November 1995
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaRangeEntry 2 }
ospfAreaRangeMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"The Subnet Mask that pertains to the Net or
Subnet."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaRangeEntry 3 }
ospfAreaRangeStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfAreaRangeEntry 4 }
ospfAreaRangeEffect OBJECT-TYPE
SYNTAX INTEGER {
advertiseMatching (1),
doNotAdvertiseMatching (2)
}
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"Subnets subsumed by ranges either trigger the
advertisement of the indicated summary (adver-
tiseMatching), or result in the subnet's not
being advertised at all outside the area."
DEFVAL { advertiseMatching }
::= { ospfAreaRangeEntry 5 }
-- OSPF Host Table
-- The Host/Metric Table indicates what hosts are directly
Baker & Coltun Standards Track [Page 29]
RFC 1850 OSPF MIB November 1995
-- attached to the Router, and what metrics and types of
-- service should be advertised for them.
ospfHostTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfHostEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The list of Hosts, and their metrics, that the
router will advertise as host routes."
REFERENCE
"OSPF Version 2, Appendix C.6 Host route param-
eters"
::= { ospf 6 }
ospfHostEntry OBJECT-TYPE
SYNTAX OspfHostEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A metric to be advertised, for a given type of
service, when a given host is reachable."
INDEX { ospfHostIpAddress, ospfHostTOS }
::= { ospfHostTable 1 }
OspfHostEntry ::=
SEQUENCE {
ospfHostIpAddress
IpAddress,
ospfHostTOS
TOSType,
ospfHostMetric
Metric,
ospfHostStatus
RowStatus,
ospfHostAreaID
AreaID
}
ospfHostIpAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP Address of the Host."
REFERENCE
"OSPF Version 2, Appendix C.6 Host route parame-
Baker & Coltun Standards Track [Page 30]
RFC 1850 OSPF MIB November 1995
ters"
::= { ospfHostEntry 1 }
ospfHostTOS OBJECT-TYPE
SYNTAX TOSType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Type of Service of the route being config-
ured."
REFERENCE
"OSPF Version 2, Appendix C.6 Host route parame-
ters"
::= { ospfHostEntry 2 }
ospfHostMetric OBJECT-TYPE
SYNTAX Metric
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The Metric to be advertised."
REFERENCE
"OSPF Version 2, Appendix C.6 Host route parame-
ters"
::= { ospfHostEntry 3 }
ospfHostStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfHostEntry 4 }
ospfHostAreaID OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Area the Host Entry is to be found within.
By default, the area that a subsuming OSPF in-
terface is in, or 0.0.0.0"
Baker & Coltun Standards Track [Page 31]
RFC 1850 OSPF MIB November 1995
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfHostEntry 5 }
-- OSPF Interface Table
-- The OSPF Interface Table augments the ipAddrTable
-- with OSPF specific information.
ospfIfTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfIfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The OSPF Interface Table describes the inter-
faces from the viewpoint of OSPF."
REFERENCE
"OSPF Version 2, Appendix C.3 Router interface
parameters"
::= { ospf 7 }
ospfIfEntry OBJECT-TYPE
SYNTAX OspfIfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The OSPF Interface Entry describes one inter-
face from the viewpoint of OSPF."
INDEX { ospfIfIpAddress, ospfAddressLessIf }
::= { ospfIfTable 1 }
OspfIfEntry ::=
SEQUENCE {
ospfIfIpAddress
IpAddress,
ospfAddressLessIf
Integer32,
ospfIfAreaId
AreaID,
ospfIfType
INTEGER,
ospfIfAdminStat
Status,
ospfIfRtrPriority
DesignatedRouterPriority,
ospfIfTransitDelay
Baker & Coltun Standards Track [Page 32]
RFC 1850 OSPF MIB November 1995
UpToMaxAge,
ospfIfRetransInterval
UpToMaxAge,
ospfIfHelloInterval
HelloRange,
ospfIfRtrDeadInterval
PositiveInteger,
ospfIfPollInterval
PositiveInteger,
ospfIfState
INTEGER,
ospfIfDesignatedRouter
IpAddress,
ospfIfBackupDesignatedRouter
IpAddress,
ospfIfEvents
Counter32,
ospfIfAuthType
INTEGER,
ospfIfAuthKey
OCTET STRING,
ospfIfStatus
RowStatus,
ospfIfMulticastForwarding
INTEGER,
ospfIfDemand
TruthValue
}
ospfIfIpAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of this OSPF interface."
::= { ospfIfEntry 1 }
ospfAddressLessIf OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"For the purpose of easing the instancing of
addressed and addressless interfaces; This
variable takes the value 0 on interfaces with
IP Addresses, and the corresponding value of
ifIndex for interfaces having no IP Address."
::= { ospfIfEntry 2 }
Baker & Coltun Standards Track [Page 33]
RFC 1850 OSPF MIB November 1995
ospfIfAreaId OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"A 32-bit integer uniquely identifying the area
to which the interface connects. Area ID
0.0.0.0 is used for the OSPF backbone."
DEFVAL { '00000000'H } -- 0.0.0.0
::= { ospfIfEntry 3 }
ospfIfType OBJECT-TYPE
SYNTAX INTEGER {
broadcast (1),
nbma (2),
pointToPoint (3),
pointToMultipoint (5)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The OSPF interface type.
By way of a default, this field may be intuited
from the corresponding value of ifType. Broad-
cast LANs, such as Ethernet and IEEE 802.5,
take the value 'broadcast', X.25 and similar
technologies take the value 'nbma', and links
that are definitively point to point take the
value 'pointToPoint'."
::= { ospfIfEntry 4 }
ospfIfAdminStat OBJECT-TYPE
SYNTAX Status
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The OSPF interface's administrative status.
The value formed on the interface, and the in-
terface will be advertised as an internal route
to some area. The value 'disabled' denotes
that the interface is external to OSPF."
DEFVAL { enabled }
::= { ospfIfEntry 5 }
ospfIfRtrPriority OBJECT-TYPE
SYNTAX DesignatedRouterPriority
Baker & Coltun Standards Track [Page 34]
RFC 1850 OSPF MIB November 1995
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The priority of this interface. Used in
multi-access networks, this field is used in
the designated router election algorithm. The
value 0 signifies that the router is not eligi-
ble to become the designated router on this
particular network. In the event of a tie in
this value, routers will use their Router ID as
a tie breaker."
DEFVAL { 1 }
::= { ospfIfEntry 6 }
ospfIfTransitDelay OBJECT-TYPE
SYNTAX UpToMaxAge
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The estimated number of seconds it takes to
transmit a link state update packet over this
interface."
DEFVAL { 1 }
::= { ospfIfEntry 7 }
ospfIfRetransInterval OBJECT-TYPE
SYNTAX UpToMaxAge
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of seconds between link-state ad-
vertisement retransmissions, for adjacencies
belonging to this interface. This value is
also used when retransmitting database descrip-
tion and link-state request packets."
DEFVAL { 5 }
::= { ospfIfEntry 8 }
ospfIfHelloInterval OBJECT-TYPE
SYNTAX HelloRange
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The length of time, in seconds, between the
Hello packets that the router sends on the in-
Baker & Coltun Standards Track [Page 35]
RFC 1850 OSPF MIB November 1995
terface. This value must be the same for all
routers attached to a common network."
DEFVAL { 10 }
::= { ospfIfEntry 9 }
ospfIfRtrDeadInterval OBJECT-TYPE
SYNTAX PositiveInteger
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of seconds that a router's Hello
packets have not been seen before it's neigh-
bors declare the router down. This should be
some multiple of the Hello interval. This
value must be the same for all routers attached
to a common network."
DEFVAL { 40 }
::= { ospfIfEntry 10 }
ospfIfPollInterval OBJECT-TYPE
SYNTAX PositiveInteger
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The larger time interval, in seconds, between
the Hello packets sent to an inactive non-
broadcast multi- access neighbor."
DEFVAL { 120 }
::= { ospfIfEntry 11 }
ospfIfState OBJECT-TYPE
SYNTAX INTEGER {
down (1),
loopback (2),
waiting (3),
pointToPoint (4),
designatedRouter (5),
backupDesignatedRouter (6),
otherDesignatedRouter (7)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The OSPF Interface State."
DEFVAL { down }
Baker & Coltun Standards Track [Page 36]
RFC 1850 OSPF MIB November 1995
::= { ospfIfEntry 12 }
ospfIfDesignatedRouter OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP Address of the Designated Router."
DEFVAL { '00000000'H } -- 0.0.0.0
::= { ospfIfEntry 13 }
ospfIfBackupDesignatedRouter OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP Address of the Backup Designated
Router."
DEFVAL { '00000000'H } -- 0.0.0.0
::= { ospfIfEntry 14 }
ospfIfEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times this OSPF interface has
changed its state, or an error has occurred."
::= { ospfIfEntry 15 }
ospfIfAuthKey OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..256))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The Authentication Key. If the Area's Author-
ization Type is simplePassword, and the key
length is shorter than 8 octets, the agent will
left adjust and zero fill to 8 octets.
Note that unauthenticated interfaces need no
authentication key, and simple password authen-
tication cannot use a key of more than 8 oc-
tets. Larger keys are useful only with authen-
tication mechanisms not specified in this docu-
Baker & Coltun Standards Track [Page 37]
RFC 1850 OSPF MIB November 1995
ment.
When read, ospfIfAuthKey always returns an Oc-
tet String of length zero."
REFERENCE
"OSPF Version 2, Section 9 The Interface Data
Structure"
DEFVAL { '0000000000000000'H } -- 0.0.0.0.0.0.0.0
::= { ospfIfEntry 16 }
ospfIfStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfIfEntry 17 }
ospfIfMulticastForwarding OBJECT-TYPE
SYNTAX INTEGER {
blocked (1), -- no multicast forwarding
multicast (2), -- using multicast address
unicast (3) -- to each OSPF neighbor
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The way multicasts should forwarded on this
interface; not forwarded, forwarded as data
link multicasts, or forwarded as data link uni-
casts. Data link multicasting is not meaning-
ful on point to point and NBMA interfaces, and
setting ospfMulticastForwarding to 0 effective-
ly disables all multicast forwarding."
DEFVAL { blocked }
::= { ospfIfEntry 18 }
ospfIfDemand OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates whether Demand OSPF procedures (hel-
Baker & Coltun Standards Track [Page 38]
RFC 1850 OSPF MIB November 1995
lo supression to FULL neighbors and setting the
DoNotAge flag on proogated LSAs) should be per-
formed on this interface."
DEFVAL { false }
::= { ospfIfEntry 19 }
ospfIfAuthType OBJECT-TYPE
SYNTAX INTEGER (0..255)
-- none (0),
-- simplePassword (1)
-- md5 (2)
-- reserved for specification by IANA (> 2)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The authentication type specified for an in-
terface. Additional authentication types may
be assigned locally."
REFERENCE
"OSPF Version 2, Appendix E Authentication"
DEFVAL { 0 } -- no authentication, by default
::= { ospfIfEntry 20 }
-- OSPF Interface Metric Table
-- The Metric Table describes the metrics to be advertised
-- for a specified interface at the various types of service.
-- As such, this table is an adjunct of the OSPF Interface
-- Table.
-- Types of service, as defined by RFC 791, have the ability
-- to request low delay, high bandwidth, or reliable linkage.
-- For the purposes of this specification, the measure of
-- bandwidth
-- Metric = 10^8 / ifSpeed
-- is the default value. For multiple link interfaces, note
-- that ifSpeed is the sum of the individual link speeds.
-- This yields a number having the following typical values:
-- Network Type/bit rate Metric
-- >= 100 MBPS 1
-- Ethernet/802.3 10
Baker & Coltun Standards Track [Page 39]
RFC 1850 OSPF MIB November 1995
-- E1 48
-- T1 (ESF) 65
-- 64 KBPS 1562
-- 56 KBPS 1785
-- 19.2 KBPS 5208
-- 9.6 KBPS 10416
-- Routes that are not specified use the default (TOS 0) metric
ospfIfMetricTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfIfMetricEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The TOS metrics for a non-virtual interface
identified by the interface index."
REFERENCE
"OSPF Version 2, Appendix C.3 Router interface
parameters"
::= { ospf 8 }
ospfIfMetricEntry OBJECT-TYPE
SYNTAX OspfIfMetricEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A particular TOS metric for a non-virtual in-
terface identified by the interface index."
REFERENCE
"OSPF Version 2, Appendix C.3 Router interface
parameters"
INDEX { ospfIfMetricIpAddress,
ospfIfMetricAddressLessIf,
ospfIfMetricTOS }
::= { ospfIfMetricTable 1 }
OspfIfMetricEntry ::=
SEQUENCE {
ospfIfMetricIpAddress
IpAddress,
ospfIfMetricAddressLessIf
Integer32,
ospfIfMetricTOS
TOSType,
ospfIfMetricValue
Metric,
ospfIfMetricStatus
RowStatus
Baker & Coltun Standards Track [Page 40]
RFC 1850 OSPF MIB November 1995
}
ospfIfMetricIpAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of this OSPF interface. On row
creation, this can be derived from the in-
stance."
::= { ospfIfMetricEntry 1 }
ospfIfMetricAddressLessIf OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"For the purpose of easing the instancing of
addressed and addressless interfaces; This
variable takes the value 0 on interfaces with
IP Addresses, and the value of ifIndex for in-
terfaces having no IP Address. On row crea-
tion, this can be derived from the instance."
::= { ospfIfMetricEntry 2 }
ospfIfMetricTOS OBJECT-TYPE
SYNTAX TOSType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of service metric being referenced.
On row creation, this can be derived from the
instance."
::= { ospfIfMetricEntry 3 }
ospfIfMetricValue OBJECT-TYPE
SYNTAX Metric
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The metric of using this type of service on
this interface. The default value of the TOS 0
Metric is 10^8 / ifSpeed."
::= { ospfIfMetricEntry 4 }
ospfIfMetricStatus OBJECT-TYPE
Baker & Coltun Standards Track [Page 41]
RFC 1850 OSPF MIB November 1995
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfIfMetricEntry 5 }
-- OSPF Virtual Interface Table
-- The Virtual Interface Table describes the virtual
-- links that the OSPF Process is configured to
-- carry on.
ospfVirtIfTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfVirtIfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information about this router's virtual inter-
faces."
REFERENCE
"OSPF Version 2, Appendix C.4 Virtual link
parameters"
::= { ospf 9 }
ospfVirtIfEntry OBJECT-TYPE
SYNTAX OspfVirtIfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information about a single Virtual Interface."
INDEX { ospfVirtIfAreaId, ospfVirtIfNeighbor }
::= { ospfVirtIfTable 1 }
OspfVirtIfEntry ::=
SEQUENCE {
ospfVirtIfAreaId
AreaID,
ospfVirtIfNeighbor
RouterID,
ospfVirtIfTransitDelay
UpToMaxAge,
ospfVirtIfRetransInterval
Baker & Coltun Standards Track [Page 42]
RFC 1850 OSPF MIB November 1995
UpToMaxAge,
ospfVirtIfHelloInterval
HelloRange,
ospfVirtIfRtrDeadInterval
PositiveInteger,
ospfVirtIfState
INTEGER,
ospfVirtIfEvents
Counter32,
ospfVirtIfAuthType
INTEGER,
ospfVirtIfAuthKey
OCTET STRING,
ospfVirtIfStatus
RowStatus
}
ospfVirtIfAreaId OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Transit Area that the Virtual Link
traverses. By definition, this is not 0.0.0.0"
::= { ospfVirtIfEntry 1 }
ospfVirtIfNeighbor OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Router ID of the Virtual Neighbor."
::= { ospfVirtIfEntry 2 }
ospfVirtIfTransitDelay OBJECT-TYPE
SYNTAX UpToMaxAge
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The estimated number of seconds it takes to
transmit a link- state update packet over this
interface."
DEFVAL { 1 }
::= { ospfVirtIfEntry 3 }
Baker & Coltun Standards Track [Page 43]
RFC 1850 OSPF MIB November 1995
ospfVirtIfRetransInterval OBJECT-TYPE
SYNTAX UpToMaxAge
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of seconds between link-state ad-
vertisement retransmissions, for adjacencies
belonging to this interface. This value is
also used when retransmitting database descrip-
tion and link-state request packets. This
value should be well over the expected round-
trip time."
DEFVAL { 5 }
::= { ospfVirtIfEntry 4 }
ospfVirtIfHelloInterval OBJECT-TYPE
SYNTAX HelloRange
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The length of time, in seconds, between the
Hello packets that the router sends on the in-
terface. This value must be the same for the
virtual neighbor."
DEFVAL { 10 }
::= { ospfVirtIfEntry 5 }
ospfVirtIfRtrDeadInterval OBJECT-TYPE
SYNTAX PositiveInteger
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of seconds that a router's Hello
packets have not been seen before it's neigh-
bors declare the router down. This should be
some multiple of the Hello interval. This
value must be the same for the virtual neigh-
bor."
DEFVAL { 60 }
::= { ospfVirtIfEntry 6 }
ospfVirtIfState OBJECT-TYPE
SYNTAX INTEGER {
down (1), -- these use the same encoding
pointToPoint (4) -- as the ospfIfTable
Baker & Coltun Standards Track [Page 44]
RFC 1850 OSPF MIB November 1995
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"OSPF virtual interface states."
DEFVAL { down }
::= { ospfVirtIfEntry 7 }
ospfVirtIfEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of state changes or error events on
this Virtual Link"
::= { ospfVirtIfEntry 8 }
ospfVirtIfAuthKey OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(0..256))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If Authentication Type is simplePassword, the
device will left adjust and zero fill to 8 oc-
tets.
Note that unauthenticated interfaces need no
authentication key, and simple password authen-
tication cannot use a key of more than 8 oc-
tets. Larger keys are useful only with authen-
tication mechanisms not specified in this docu-
ment.
When read, ospfVifAuthKey always returns a
string of length zero."
REFERENCE
"OSPF Version 2, Section 9 The Interface Data
Structure"
DEFVAL { '0000000000000000'H } -- 0.0.0.0.0.0.0.0
::= { ospfVirtIfEntry 9 }
ospfVirtIfStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
Baker & Coltun Standards Track [Page 45]
RFC 1850 OSPF MIB November 1995
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfVirtIfEntry 10 }
ospfVirtIfAuthType OBJECT-TYPE
SYNTAX INTEGER (0..255)
-- none (0),
-- simplePassword (1)
-- md5 (2)
-- reserved for specification by IANA (> 2)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The authentication type specified for a virtu-
al interface. Additional authentication types
may be assigned locally."
REFERENCE
"OSPF Version 2, Appendix E Authentication"
DEFVAL { 0 } -- no authentication, by default
::= { ospfVirtIfEntry 11 }
-- OSPF Neighbor Table
-- The OSPF Neighbor Table describes all neighbors in
-- the locality of the subject router.
ospfNbrTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of non-virtual neighbor information."
REFERENCE
"OSPF Version 2, Section 10 The Neighbor Data
Structure"
::= { ospf 10 }
ospfNbrEntry OBJECT-TYPE
SYNTAX OspfNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
Baker & Coltun Standards Track [Page 46]
RFC 1850 OSPF MIB November 1995
"The information regarding a single neighbor."
REFERENCE
"OSPF Version 2, Section 10 The Neighbor Data
Structure"
INDEX { ospfNbrIpAddr, ospfNbrAddressLessIndex }
::= { ospfNbrTable 1 }
OspfNbrEntry ::=
SEQUENCE {
ospfNbrIpAddr
IpAddress,
ospfNbrAddressLessIndex
InterfaceIndex,
ospfNbrRtrId
RouterID,
ospfNbrOptions
Integer32,
ospfNbrPriority
DesignatedRouterPriority,
ospfNbrState
INTEGER,
ospfNbrEvents
Counter32,
ospfNbrLsRetransQLen
Gauge32,
ospfNbmaNbrStatus
RowStatus,
ospfNbmaNbrPermanence
INTEGER,
ospfNbrHelloSuppressed
TruthValue
}
ospfNbrIpAddr OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address this neighbor is using in its
IP Source Address. Note that, on addressless
links, this will not be 0.0.0.0, but the ad-
dress of another of the neighbor's interfaces."
::= { ospfNbrEntry 1 }
ospfNbrAddressLessIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
Baker & Coltun Standards Track [Page 47]
RFC 1850 OSPF MIB November 1995
STATUS current
DESCRIPTION
"On an interface having an IP Address, zero.
On addressless interfaces, the corresponding
value of ifIndex in the Internet Standard MIB.
On row creation, this can be derived from the
instance."
::= { ospfNbrEntry 2 }
ospfNbrRtrId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A 32-bit integer (represented as a type IpAd-
dress) uniquely identifying the neighboring
router in the Autonomous System."
DEFVAL { '00000000'H } -- 0.0.0.0
::= { ospfNbrEntry 3 }
ospfNbrOptions OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A Bit Mask corresponding to the neighbor's op-
tions field.
Bit 0, if set, indicates that the system will
operate on Type of Service metrics other than
TOS 0. If zero, the neighbor will ignore all
metrics except the TOS 0 metric.
Bit 1, if set, indicates that the associated
area accepts and operates on external informa-
tion; if zero, it is a stub area.
Bit 2, if set, indicates that the system is ca-
pable of routing IP Multicast datagrams; i.e.,
that it implements the Multicast Extensions to
OSPF.
Bit 3, if set, indicates that the associated
area is an NSSA. These areas are capable of
carrying type 7 external advertisements, which
are translated into type 5 external advertise-
Baker & Coltun Standards Track [Page 48]
RFC 1850 OSPF MIB November 1995
ments at NSSA borders."
REFERENCE
"OSPF Version 2, Section 12.1.2 Options"
DEFVAL { 0 }
::= { ospfNbrEntry 4 }
ospfNbrPriority OBJECT-TYPE
SYNTAX DesignatedRouterPriority
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The priority of this neighbor in the designat-
ed router election algorithm. The value 0 sig-
nifies that the neighbor is not eligible to be-
come the designated router on this particular
network."
DEFVAL { 1 }
::= { ospfNbrEntry 5 }
ospfNbrState OBJECT-TYPE
SYNTAX INTEGER {
down (1),
attempt (2),
init (3),
twoWay (4),
exchangeStart (5),
exchange (6),
loading (7),
full (8)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The State of the relationship with this Neigh-
bor."
REFERENCE
"OSPF Version 2, Section 10.1 Neighbor States"
DEFVAL { down }
::= { ospfNbrEntry 6 }
ospfNbrEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
Baker & Coltun Standards Track [Page 49]
RFC 1850 OSPF MIB November 1995
"The number of times this neighbor relationship
has changed state, or an error has occurred."
::= { ospfNbrEntry 7 }
ospfNbrLsRetransQLen OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current length of the retransmission
queue."
::= { ospfNbrEntry 8 }
ospfNbmaNbrStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfNbrEntry 9 }
ospfNbmaNbrPermanence OBJECT-TYPE
SYNTAX INTEGER {
dynamic (1), -- learned through protocol
permanent (2) -- configured address
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. 'dynamic' and 'permanent' refer to how
the neighbor became known."
DEFVAL { permanent }
::= { ospfNbrEntry 10 }
ospfNbrHelloSuppressed OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates whether Hellos are being suppressed
Baker & Coltun Standards Track [Page 50]
RFC 1850 OSPF MIB November 1995
to the neighbor"
::= { ospfNbrEntry 11 }
-- OSPF Virtual Neighbor Table
-- This table describes all virtual neighbors.
-- Since Virtual Links are configured in the
-- virtual interface table, this table is read-only.
ospfVirtNbrTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfVirtNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of virtual neighbor information."
REFERENCE
"OSPF Version 2, Section 15 Virtual Links"
::= { ospf 11 }
ospfVirtNbrEntry OBJECT-TYPE
SYNTAX OspfVirtNbrEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Virtual neighbor information."
INDEX { ospfVirtNbrArea, ospfVirtNbrRtrId }
::= { ospfVirtNbrTable 1 }
OspfVirtNbrEntry ::=
SEQUENCE {
ospfVirtNbrArea
AreaID,
ospfVirtNbrRtrId
RouterID,
ospfVirtNbrIpAddr
IpAddress,
ospfVirtNbrOptions
Integer32,
ospfVirtNbrState
INTEGER,
ospfVirtNbrEvents
Counter32,
ospfVirtNbrLsRetransQLen
Gauge32,
ospfVirtNbrHelloSuppressed
TruthValue
Baker & Coltun Standards Track [Page 51]
RFC 1850 OSPF MIB November 1995
}
ospfVirtNbrArea OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Transit Area Identifier."
::= { ospfVirtNbrEntry 1 }
ospfVirtNbrRtrId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A 32-bit integer uniquely identifying the
neighboring router in the Autonomous System."
::= { ospfVirtNbrEntry 2 }
ospfVirtNbrIpAddr OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address this Virtual Neighbor is us-
ing."
::= { ospfVirtNbrEntry 3 }
ospfVirtNbrOptions OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A Bit Mask corresponding to the neighbor's op-
tions field.
Bit 1, if set, indicates that the system will
operate on Type of Service metrics other than
TOS 0. If zero, the neighbor will ignore all
metrics except the TOS 0 metric.
Bit 2, if set, indicates that the system is
Network Multicast capable; ie, that it imple-
ments OSPF Multicast Routing."
::= { ospfVirtNbrEntry 4 }
Baker & Coltun Standards Track [Page 52]
RFC 1850 OSPF MIB November 1995
ospfVirtNbrState OBJECT-TYPE
SYNTAX INTEGER {
down (1),
attempt (2),
init (3),
twoWay (4),
exchangeStart (5),
exchange (6),
loading (7),
full (8)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The state of the Virtual Neighbor Relation-
ship."
::= { ospfVirtNbrEntry 5 }
ospfVirtNbrEvents OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times this virtual link has
changed its state, or an error has occurred."
::= { ospfVirtNbrEntry 6 }
ospfVirtNbrLsRetransQLen OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current length of the retransmission
queue."
::= { ospfVirtNbrEntry 7 }
ospfVirtNbrHelloSuppressed OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates whether Hellos are being suppressed
to the neighbor"
::= { ospfVirtNbrEntry 8 }
Baker & Coltun Standards Track [Page 53]
RFC 1850 OSPF MIB November 1995
-- OSPF Link State Database, External
-- The Link State Database contains the Link State
-- Advertisements from throughout the areas that the
-- device is attached to.
-- This table is identical to the OSPF LSDB Table in
-- format, but contains only External Link State
-- Advertisements. The purpose is to allow external
-- LSAs to be displayed once for the router rather
-- than once in each non-stub area.
ospfExtLsdbTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfExtLsdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The OSPF Process's Links State Database."
REFERENCE
"OSPF Version 2, Section 12 Link State Adver-
tisements"
::= { ospf 12 }
ospfExtLsdbEntry OBJECT-TYPE
SYNTAX OspfExtLsdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A single Link State Advertisement."
INDEX { ospfExtLsdbType, ospfExtLsdbLsid, ospfExtLsdbRouterId }
::= { ospfExtLsdbTable 1 }
OspfExtLsdbEntry ::=
SEQUENCE {
ospfExtLsdbType
INTEGER,
ospfExtLsdbLsid
IpAddress,
ospfExtLsdbRouterId
RouterID,
ospfExtLsdbSequence
Integer32,
ospfExtLsdbAge
Integer32,
ospfExtLsdbChecksum
Integer32,
ospfExtLsdbAdvertisement
Baker & Coltun Standards Track [Page 54]
RFC 1850 OSPF MIB November 1995
OCTET STRING
}
ospfExtLsdbType OBJECT-TYPE
SYNTAX INTEGER {
asExternalLink (5)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of the link state advertisement.
Each link state type has a separate advertise-
ment format."
REFERENCE
"OSPF Version 2, Appendix A.4.1 The Link State
Advertisement header"
::= { ospfExtLsdbEntry 1 }
ospfExtLsdbLsid OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Link State ID is an LS Type Specific field
containing either a Router ID or an IP Address;
it identifies the piece of the routing domain
that is being described by the advertisement."
REFERENCE
"OSPF Version 2, Section 12.1.4 Link State ID"
::= { ospfExtLsdbEntry 2 }
ospfExtLsdbRouterId OBJECT-TYPE
SYNTAX RouterID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 32 bit number that uniquely identifies the
originating router in the Autonomous System."
REFERENCE
"OSPF Version 2, Appendix C.1 Global parameters"
::= { ospfExtLsdbEntry 3 }
-- Note that the OSPF Sequence Number is a 32 bit signed
-- integer. It starts with the value '80000001'h,
-- or -'7FFFFFFF'h, and increments until '7FFFFFFF'h
-- Thus, a typical sequence number will be very negative.
Baker & Coltun Standards Track [Page 55]
RFC 1850 OSPF MIB November 1995
ospfExtLsdbSequence OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sequence number field is a signed 32-bit
integer. It is used to detect old and dupli-
cate link state advertisements. The space of
sequence numbers is linearly ordered. The
larger the sequence number the more recent the
advertisement."
REFERENCE
"OSPF Version 2, Section 12.1.6 LS sequence
number"
::= { ospfExtLsdbEntry 4 }
ospfExtLsdbAge OBJECT-TYPE
SYNTAX Integer32 -- Should be 0..MaxAge
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This field is the age of the link state adver-
tisement in seconds."
REFERENCE
"OSPF Version 2, Section 12.1.1 LS age"
::= { ospfExtLsdbEntry 5 }
ospfExtLsdbChecksum OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This field is the checksum of the complete
contents of the advertisement, excepting the
age field. The age field is excepted so that
an advertisement's age can be incremented
without updating the checksum. The checksum
used is the same that is used for ISO connec-
tionless datagrams; it is commonly referred to
as the Fletcher checksum."
REFERENCE
"OSPF Version 2, Section 12.1.7 LS checksum"
::= { ospfExtLsdbEntry 6 }
ospfExtLsdbAdvertisement OBJECT-TYPE
Baker & Coltun Standards Track [Page 56]
RFC 1850 OSPF MIB November 1995
SYNTAX OCTET STRING (SIZE(36))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The entire Link State Advertisement, including
its header."
REFERENCE
"OSPF Version 2, Section 12 Link State Adver-
tisements"
::= { ospfExtLsdbEntry 7 }
-- OSPF Use of the CIDR Route Table
ospfRouteGroup OBJECT IDENTIFIER ::= { ospf 13 }
-- The IP Forwarding Table defines a number of objects for use by
-- the routing protocol to externalize its information. Most of
-- the variables (ipForwardDest, ipForwardMask, ipForwardPolicy,
-- ipForwardNextHop, ipForwardIfIndex, ipForwardType,
-- ipForwardProto, ipForwardAge, and ipForwardNextHopAS) are
-- defined there.
-- Those that leave some discretion are defined here.
-- ipCidrRouteProto is, of course, ospf (13).
-- ipCidrRouteAge is the time since the route was first calculated,
-- as opposed to the time since the last SPF run.
-- ipCidrRouteInfo is an OBJECT IDENTIFIER for use by the routing
-- protocol. The following values shall be found there depending
-- on the way the route was calculated.
ospfIntraArea OBJECT IDENTIFIER ::= { ospfRouteGroup 1 }
ospfInterArea OBJECT IDENTIFIER ::= { ospfRouteGroup 2 }
ospfExternalType1 OBJECT IDENTIFIER ::= { ospfRouteGroup 3 }
ospfExternalType2 OBJECT IDENTIFIER ::= { ospfRouteGroup 4 }
-- ipCidrRouteMetric1 is, by definition, the primary routing
-- metric. Therefore, it should be the metric that route
-- selection is based on. For intra-area and inter-area routes,
-- it is an OSPF metric. For External Type 1 (comparable value)
-- routes, it is an OSPF metric plus the External Metric. For
-- external Type 2 (non-comparable value) routes, it is the
-- external metric.
-- ipCidrRouteMetric2 is, by definition, a secondary routing
Baker & Coltun Standards Track [Page 57]
RFC 1850 OSPF MIB November 1995
-- metric. Therefore, it should be the metric that breaks a tie
-- among routes having equal metric1 values and the same
-- calculation rule. For intra-area, inter-area routes, and
-- External Type 1 (comparable value) routes, it is unused. For
-- external Type 2 (non-comparable value) routes, it is the metric
-- to the AS border router.
-- ipCidrRouteMetric3, ipCidrRouteMetric4, and ipCidrRouteMetric5 are
-- unused.
--
-- The OSPF Area Aggregate Table
--
-- This table replaces the OSPF Area Summary Table, being an
-- extension of that for CIDR routers.
ospfAreaAggregateTable OBJECT-TYPE
SYNTAX SEQUENCE OF OspfAreaAggregateEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A range of IP addresses specified by an IP
address/IP network mask pair. For example,
class B address range of X.X.X.X with a network
mask of 255.255.0.0 includes all IP addresses
from X.X.0.0 to X.X.255.255. Note that if
ranges are configured such that one range sub-
sumes another range (e.g., 10.0.0.0 mask
255.0.0.0 and 10.1.0.0 mask 255.255.0.0), the
most specific match is the preferred one."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospf 14 }
ospfAreaAggregateEntry OBJECT-TYPE
SYNTAX OspfAreaAggregateEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A range of IP addresses specified by an IP
address/IP network mask pair. For example,
class B address range of X.X.X.X with a network
mask of 255.255.0.0 includes all IP addresses
from X.X.0.0 to X.X.255.255. Note that if
ranges are range configured such that one range
subsumes another range (e.g., 10.0.0.0 mask
255.0.0.0 and 10.1.0.0 mask 255.255.0.0), the
Baker & Coltun Standards Track [Page 58]
RFC 1850 OSPF MIB November 1995
most specific match is the preferred one."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
INDEX { ospfAreaAggregateAreaID, ospfAreaAggregateLsdbType,
ospfAreaAggregateNet, ospfAreaAggregateMask }
::= { ospfAreaAggregateTable 1 }
OspfAreaAggregateEntry ::=
SEQUENCE {
ospfAreaAggregateAreaID
AreaID,
ospfAreaAggregateLsdbType
INTEGER,
ospfAreaAggregateNet
IpAddress,
ospfAreaAggregateMask
IpAddress,
ospfAreaAggregateStatus
RowStatus,
ospfAreaAggregateEffect
INTEGER
}
ospfAreaAggregateAreaID OBJECT-TYPE
SYNTAX AreaID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Area the Address Aggregate is to be found
within."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaAggregateEntry 1 }
ospfAreaAggregateLsdbType OBJECT-TYPE
SYNTAX INTEGER {
summaryLink (3),
nssaExternalLink (7)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of the Address Aggregate. This field
specifies the Lsdb type that this Address Ag-
gregate applies to."
REFERENCE
Baker & Coltun Standards Track [Page 59]
RFC 1850 OSPF MIB November 1995
"OSPF Version 2, Appendix A.4.1 The Link State
Advertisement header"
::= { ospfAreaAggregateEntry 2 }
ospfAreaAggregateNet OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP Address of the Net or Subnet indicated
by the range."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaAggregateEntry 3 }
ospfAreaAggregateMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Subnet Mask that pertains to the Net or
Subnet."
REFERENCE
"OSPF Version 2, Appendix C.2 Area parameters"
::= { ospfAreaAggregateEntry 4 }
ospfAreaAggregateStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable displays the status of the en-
try. Setting it to 'invalid' has the effect of
rendering it inoperative. The internal effect
(row removal) is implementation dependent."
::= { ospfAreaAggregateEntry 5 }
ospfAreaAggregateEffect OBJECT-TYPE
SYNTAX INTEGER {
advertiseMatching (1),
doNotAdvertiseMatching (2)
}
MAX-ACCESS read-create
STATUS current
Baker & Coltun Standards Track [Page 60]
RFC 1850 OSPF MIB November 1995
DESCRIPTION
"Subnets subsumed by ranges either trigger the
advertisement of the indicated aggregate (ad-
vertiseMatching), or result in the subnet's not
being advertised at all outside the area."
DEFVAL { advertiseMatching }
::= { ospfAreaAggregateEntry 6 }
-- conformance information
ospfConformance OBJECT IDENTIFIER ::= { ospf 15 }
ospfGroups OBJECT IDENTIFIER ::= { ospfConformance 1 }
ospfCompliances OBJECT IDENTIFIER ::= { ospfConformance 2 }
-- compliance statements
ospfCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement "
MODULE -- this module
MANDATORY-GROUPS {
ospfBasicGroup,
ospfAreaGroup,
ospfStubAreaGroup,
ospfIfGroup,
ospfIfMetricGroup,
ospfVirtIfGroup,
ospfNbrGroup,
ospfVirtNbrGroup,
ospfAreaAggregateGroup
}
::= { ospfCompliances 1 }
-- units of conformance
ospfBasicGroup OBJECT-GROUP
OBJECTS {
ospfRouterId,
ospfAdminStat,
ospfVersionNumber,
ospfAreaBdrRtrStatus,
ospfASBdrRtrStatus,
ospfExternLsaCount,
ospfExternLsaCksumSum,
Baker & Coltun Standards Track [Page 61]
RFC 1850 OSPF MIB November 1995
ospfTOSSupport,
ospfOriginateNewLsas,
ospfRxNewLsas,
ospfExtLsdbLimit,
ospfMulticastExtensions,
ospfExitOverflowInterval,
ospfDemandExtensions
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 1 }
ospfAreaGroup OBJECT-GROUP
OBJECTS {
ospfAreaId,
ospfImportAsExtern,
ospfSpfRuns,
ospfAreaBdrRtrCount,
ospfAsBdrRtrCount,
ospfAreaLsaCount,
ospfAreaLsaCksumSum,
ospfAreaSummary,
ospfAreaStatus
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
supporting areas."
::= { ospfGroups 2 }
ospfStubAreaGroup OBJECT-GROUP
OBJECTS {
ospfStubAreaId,
ospfStubTOS,
ospfStubMetric,
ospfStubStatus,
ospfStubMetricType
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
supporting stub areas."
::= { ospfGroups 3 }
Baker & Coltun Standards Track [Page 62]
RFC 1850 OSPF MIB November 1995
ospfLsdbGroup OBJECT-GROUP
OBJECTS {
ospfLsdbAreaId,
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId,
ospfLsdbSequence,
ospfLsdbAge,
ospfLsdbChecksum,
ospfLsdbAdvertisement
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
that display their link state database."
::= { ospfGroups 4 }
ospfAreaRangeGroup OBJECT-GROUP
OBJECTS {
ospfAreaRangeAreaId,
ospfAreaRangeNet,
ospfAreaRangeMask,
ospfAreaRangeStatus,
ospfAreaRangeEffect
}
STATUS obsolete
DESCRIPTION
"These objects are required for non-CIDR OSPF
systems that support multiple areas."
::= { ospfGroups 5 }
ospfHostGroup OBJECT-GROUP
OBJECTS {
ospfHostIpAddress,
ospfHostTOS,
ospfHostMetric,
ospfHostStatus,
ospfHostAreaID
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
that support attached hosts."
::= { ospfGroups 6 }
Baker & Coltun Standards Track [Page 63]
RFC 1850 OSPF MIB November 1995
ospfIfGroup OBJECT-GROUP
OBJECTS {
ospfIfIpAddress,
ospfAddressLessIf,
ospfIfAreaId,
ospfIfType,
ospfIfAdminStat,
ospfIfRtrPriority,
ospfIfTransitDelay,
ospfIfRetransInterval,
ospfIfHelloInterval,
ospfIfRtrDeadInterval,
ospfIfPollInterval,
ospfIfState,
ospfIfDesignatedRouter,
ospfIfBackupDesignatedRouter,
ospfIfEvents,
ospfIfAuthType,
ospfIfAuthKey,
ospfIfStatus,
ospfIfMulticastForwarding,
ospfIfDemand
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 7 }
ospfIfMetricGroup OBJECT-GROUP
OBJECTS {
ospfIfMetricIpAddress,
ospfIfMetricAddressLessIf,
ospfIfMetricTOS,
ospfIfMetricValue,
ospfIfMetricStatus
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 8 }
ospfVirtIfGroup OBJECT-GROUP
OBJECTS {
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfVirtIfTransitDelay,
Baker & Coltun Standards Track [Page 64]
RFC 1850 OSPF MIB November 1995
ospfVirtIfRetransInterval,
ospfVirtIfHelloInterval,
ospfVirtIfRtrDeadInterval,
ospfVirtIfState,
ospfVirtIfEvents,
ospfVirtIfAuthType,
ospfVirtIfAuthKey,
ospfVirtIfStatus
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 9 }
ospfNbrGroup OBJECT-GROUP
OBJECTS {
ospfNbrIpAddr,
ospfNbrAddressLessIndex,
ospfNbrRtrId,
ospfNbrOptions,
ospfNbrPriority,
ospfNbrState,
ospfNbrEvents,
ospfNbrLsRetransQLen,
ospfNbmaNbrStatus,
ospfNbmaNbrPermanence,
ospfNbrHelloSuppressed
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 10 }
ospfVirtNbrGroup OBJECT-GROUP
OBJECTS {
ospfVirtNbrArea,
ospfVirtNbrRtrId,
ospfVirtNbrIpAddr,
ospfVirtNbrOptions,
ospfVirtNbrState,
ospfVirtNbrEvents,
ospfVirtNbrLsRetransQLen,
ospfVirtNbrHelloSuppressed
}
STATUS current
DESCRIPTION
Baker & Coltun Standards Track [Page 65]
RFC 1850 OSPF MIB November 1995
"These objects are required for OSPF systems."
::= { ospfGroups 11 }
ospfExtLsdbGroup OBJECT-GROUP
OBJECTS {
ospfExtLsdbType,
ospfExtLsdbLsid,
ospfExtLsdbRouterId,
ospfExtLsdbSequence,
ospfExtLsdbAge,
ospfExtLsdbChecksum,
ospfExtLsdbAdvertisement
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems
that display their link state database."
::= { ospfGroups 12 }
ospfAreaAggregateGroup OBJECT-GROUP
OBJECTS {
ospfAreaAggregateAreaID,
ospfAreaAggregateLsdbType,
ospfAreaAggregateNet,
ospfAreaAggregateMask,
ospfAreaAggregateStatus,
ospfAreaAggregateEffect
}
STATUS current
DESCRIPTION
"These objects are required for OSPF systems."
::= { ospfGroups 13 }
END
4. OSPF Traps
OSPF is an event driven routing protocol, where an event can be a
change in an OSPF interface's link-level status, the expiration of an
OSPF timer or the reception of an OSPF protocol packet. Many of the
actions that OSPF takes as a result of these events will result in a
change of the routing topology. As routing topologies become large
and complex it is often difficult to locate the source of a topology
change or unpredicted routing path by polling a large number or
routers. Another approach is to notify a network manager of
potentially critical OSPF events with SNMP traps.
Baker & Coltun Standards Track [Page 66]
RFC 1850 OSPF MIB November 1995
This section defines a set of traps, objects and mechanisms to
enhance the ability to manage IP internetworks which use OSPF as its
IGP. It is an optional but useful extension to the OSPF MIB.
4.1. Format Of Trap Definitions
Section 7 contains contains the trap definitions.
4.2. Approach
The mechanism for sending traps is straight-forward. When an
exception event occurs, the application notifies the local agent who
sends a trap to the appropriate SNMP management stations. The
message includes the trap type and may include a list of trap
specific variables. A new object is defined in section 3.2 that will
allow a network manager to enable or disable particular OSPF traps.
Section 5 gives the trap definitions which includes the variable
lists. The router ID of the originator of the trap is included in
the variable list so that the network manager may easily determine
the source of the trap.
To limit the frequency of OSPF traps, the following additional
mechanisms are suggested.
4.3. Ignoring Initial Activity
The majority of critical events occur when OSPF is enabled on a
router, at which time the designated router is elected and neighbor
adjacencies are formed. During this initial period a potential flood
of traps is unnecessary since the events are expected. To avoid
unnecessary traps, a router should not originate expected OSPF
interface related traps until two of that interface's dead timer
intervals have elapsed. The expected OSPF interface traps are
ospfIfStateChange, ospfVirtIfStateChange, ospfNbrStateChange,
ospfVirtNbrStateChange, ospfTxRetranmit and ospfVirtIfTxRetransmit.
Additionally, ospfMaxAgeLsa and ospfOriginateLsa traps should not be
originated until two dead timer intervals have elapsed where the dead
timer interval used should be the dead timer with the smallest value.
4.4. Throttling Traps
The mechanism for throttling the traps is similar to the mechanism
explained in RFC 1224 [11], section 5. The basic idea is that there
is a sliding window in seconds and an upper bound on the number of
traps that may be generated within this window. Unlike RFC 1224,
traps are not sent to inform the network manager that the throttling
mechanism has kicked in.
Baker & Coltun Standards Track [Page 67]
RFC 1850 OSPF MIB November 1995
A single window should be used to throttle all OSPF traps types
except for the ospfLsdbOverflow and the ospfLsdbApproachingOverflow
trap which should not be throttled. For example, if the window time
is 3, the upper bound is 3 and the events that would cause trap types
1,3,5 and 7 occur within a 3 second period, the type 7 trap should
not be generated.
Appropriate values are 7 traps with a window time of 10 seconds.
4.5. One Trap Per OSPF Event
Several of the traps defined in section 5 are generated as the result
of finding an unusual condition while parsing an OSPF packet or a
processing a timer event. There may be more than one unusual
condition detected while handling the event. For example, a link-
state update packet may contain several retransmitted link-state
advertisements (LSAs), or a retransmitted database description packet
may contain several database description entries. To limit the
number of traps and variables, OSPF should generate at most one trap
per OSPF event. Only the variables associated with the first unusual
condition should be included with the trap. Similarly, if more than
one type of unusual condition is encountered while parsing the
packet, only the first event will generate a trap.
4.6. Polling Event Counters
Many of the tables in the OSPF MIB contain generalized event
counters. By enabling the traps defined in this document a network
manager can obtain more specific information about these events. A
network manager may want to poll these event counters and enable
specific OSPF traps when a particular counter starts increasing
abnormally.
The following table shows the relationship between the event counters
defined in the OSPF MIB and the trap types defined in section 5.
Counter32 Trap Type
----------------------- ------------------------
ospfOriginateNewLsas ospfOriginateLsa
ospfIfEvents ospfIfStateChange
ospfConfigError
ospfIfAuthFailure
ospfRxBadPacket
ospfTxRetransmit
ospfVirtIfEvents ospfVirtIfStateChange
ospfVirtIfConfigError
ospfVirtIfAuthFailure
Baker & Coltun Standards Track [Page 68]
RFC 1850 OSPF MIB November 1995
ospfVirtIfRxBadPacket
ospfVirtIfTxRetransmit
ospfNbrEvents ospfNbrStateChange
ospfVirtNbrEvents ospfVirtNbrStateChange
ospfExternLSACount ospfLsdbApproachingOverflow
ospfExternLSACount ospfLsdbOverflow
5. OSPF Trap Definitions
OSPF-TRAP-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, IpAddress
FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
ospfRouterId, ospfIfIpAddress, ospfAddressLessIf, ospfIfState,
ospfVirtIfAreaId, ospfVirtIfNeighbor, ospfVirtIfState,
ospfNbrIpAddr, ospfNbrAddressLessIndex, ospfNbrRtrId,
ospfNbrState, ospfVirtNbrArea, ospfVirtNbrRtrId, ospfVirtNbrState,
ospfLsdbType, ospfLsdbLsid, ospfLsdbRouterId, ospfLsdbAreaId,
ospfExtLsdbLimit, ospf
FROM OSPF-MIB;
ospfTrap MODULE-IDENTITY
LAST-UPDATED "9501201225Z" -- Fri Jan 20 12:25:50 PST 1995
ORGANIZATION "IETF OSPF Working Group"
CONTACT-INFO
" Fred Baker
Postal: Cisco Systems
519 Lado Drive
Santa Barbara, California 93111
Tel: +1 805 681 0115
E-Mail: fred@cisco.com
Rob Coltun
Postal: RainbowBridge Communications
Tel: (301) 340-9416
E-Mail: rcoltun@rainbow-bridge.com"
DESCRIPTION
"The MIB module to describe traps for the OSPF
Version 2 Protocol."
::= { ospf 16 }
-- Trap Support Objects
-- The following are support objects for the OSPF traps.
Baker & Coltun Standards Track [Page 69]
RFC 1850 OSPF MIB November 1995
ospfTrapControl OBJECT IDENTIFIER ::= { ospfTrap 1 }
ospfTraps OBJECT IDENTIFIER ::= { ospfTrap 2 }
ospfSetTrap OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(4))
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A four-octet string serving as a bit map for
the trap events defined by the OSPF traps. This
object is used to enable and disable specific
OSPF traps where a 1 in the bit field
represents enabled. The right-most bit (least
significant) represents trap 0."
::= { ospfTrapControl 1 }
ospfConfigErrorType OBJECT-TYPE
SYNTAX INTEGER {
badVersion (1),
areaMismatch (2),
unknownNbmaNbr (3), -- Router is Dr eligible
unknownVirtualNbr (4),
authTypeMismatch(5),
authFailure (6),
netMaskMismatch (7),
helloIntervalMismatch (8),
deadIntervalMismatch (9),
optionMismatch (10) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Potential types of configuration conflicts.
Used by the ospfConfigError and ospfConfigVir-
tError traps."
::= { ospfTrapControl 2 }
ospfPacketType OBJECT-TYPE
SYNTAX INTEGER {
hello (1),
dbDescript (2),
lsReq (3),
lsUpdate (4),
lsAck (5) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
Baker & Coltun Standards Track [Page 70]
RFC 1850 OSPF MIB November 1995
"OSPF packet types."
::= { ospfTrapControl 3 }
ospfPacketSrc OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of an inbound packet that can-
not be identified by a neighbor instance."
::= { ospfTrapControl 4 }
-- Traps
ospfIfStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfIfState -- The new state
}
STATUS current
DESCRIPTION
"An ospfIfStateChange trap signifies that there
has been a change in the state of a non-virtual
OSPF interface. This trap should be generated
when the interface state regresses (e.g., goes
from Dr to Down) or progresses to a terminal
state (i.e., Point-to-Point, DR Other, Dr, or
Backup)."
::= { ospfTraps 16 }
ospfVirtIfStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfVirtIfState -- The new state
}
STATUS current
DESCRIPTION
"An ospfIfStateChange trap signifies that there
has been a change in the state of an OSPF vir-
tual interface.
Baker & Coltun Standards Track [Page 71]
RFC 1850 OSPF MIB November 1995
This trap should be generated when the inter-
face state regresses (e.g., goes from Point-
to-Point to Down) or progresses to a terminal
state (i.e., Point-to-Point)."
::= { ospfTraps 1 }
ospfNbrStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfNbrIpAddr,
ospfNbrAddressLessIndex,
ospfNbrRtrId,
ospfNbrState -- The new state
}
STATUS current
DESCRIPTION
"An ospfNbrStateChange trap signifies that
there has been a change in the state of a non-
virtual OSPF neighbor. This trap should be
generated when the neighbor state regresses
(e.g., goes from Attempt or Full to 1-Way or
Down) or progresses to a terminal state (e.g.,
2-Way or Full). When an neighbor transitions
from or to Full on non-broadcast multi-access
and broadcast networks, the trap should be gen-
erated by the designated router. A designated
router transitioning to Down will be noted by
ospfIfStateChange."
::= { ospfTraps 2 }
ospfVirtNbrStateChange NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtNbrArea,
ospfVirtNbrRtrId,
ospfVirtNbrState -- The new state
}
STATUS current
DESCRIPTION
"An ospfIfStateChange trap signifies that there
has been a change in the state of an OSPF vir-
tual neighbor. This trap should be generated
when the neighbor state regresses (e.g., goes
from Attempt or Full to 1-Way or Down) or
progresses to a terminal state (e.g., Full)."
::= { ospfTraps 3 }
Baker & Coltun Standards Track [Page 72]
RFC 1850 OSPF MIB November 1995
ospfIfConfigError NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfPacketSrc, -- The source IP address
ospfConfigErrorType, -- Type of error
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfIfConfigError trap signifies that a
packet has been received on a non-virtual in-
terface from a router whose configuration
parameters conflict with this router's confi-
guration parameters. Note that the event op-
tionMismatch should cause a trap only if it
prevents an adjacency from forming."
::= { ospfTraps 4 }
ospfVirtIfConfigError NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfConfigErrorType, -- Type of error
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfConfigError trap signifies that a pack-
et has been received on a virtual interface
from a router whose configuration parameters
conflict with this router's configuration
parameters. Note that the event optionMismatch
should cause a trap only if it prevents an ad-
jacency from forming."
::= { ospfTraps 5 }
ospfIfAuthFailure NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfPacketSrc, -- The source IP address
ospfConfigErrorType, -- authTypeMismatch or
Baker & Coltun Standards Track [Page 73]
RFC 1850 OSPF MIB November 1995
-- authFailure
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfIfAuthFailure trap signifies that a
packet has been received on a non-virtual in-
terface from a router whose authentication key
or authentication type conflicts with this
router's authentication key or authentication
type."
::= { ospfTraps 6 }
ospfVirtIfAuthFailure NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfConfigErrorType, -- authTypeMismatch or
-- authFailure
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfVirtIfAuthFailure trap signifies that a
packet has been received on a virtual interface
from a router whose authentication key or au-
thentication type conflicts with this router's
authentication key or authentication type."
::= { ospfTraps 7 }
ospfIfRxBadPacket NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfPacketSrc, -- The source IP address
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfIfRxBadPacket trap signifies that an
OSPF packet has been received on a non-virtual
interface that cannot be parsed."
::= { ospfTraps 8 }
Baker & Coltun Standards Track [Page 74]
RFC 1850 OSPF MIB November 1995
ospfVirtIfRxBadPacket NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfPacketType
}
STATUS current
DESCRIPTION
"An ospfRxBadPacket trap signifies that an OSPF
packet has been received on a virtual interface
that cannot be parsed."
::= { ospfTraps 9 }
ospfTxRetransmit NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfIfIpAddress,
ospfAddressLessIf,
ospfNbrRtrId, -- Destination
ospfPacketType,
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
DESCRIPTION
"An ospfTxRetransmit trap signifies than an
OSPF packet has been retransmitted on a non-
virtual interface. All packets that may be re-
transmitted are associated with an LSDB entry.
The LS type, LS ID, and Router ID are used to
identify the LSDB entry."
::= { ospfTraps 10 }
ospfVirtIfTxRetransmit NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfVirtIfAreaId,
ospfVirtIfNeighbor,
ospfPacketType,
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
Baker & Coltun Standards Track [Page 75]
RFC 1850 OSPF MIB November 1995
DESCRIPTION
"An ospfTxRetransmit trap signifies than an
OSPF packet has been retransmitted on a virtual
interface. All packets that may be retransmit-
ted are associated with an LSDB entry. The LS
type, LS ID, and Router ID are used to identify
the LSDB entry."
::= { ospfTraps 11 }
ospfOriginateLsa NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfLsdbAreaId, -- 0.0.0.0 for AS Externals
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
DESCRIPTION
"An ospfOriginateLsa trap signifies that a new
LSA has been originated by this router. This
trap should not be invoked for simple refreshes
of LSAs (which happesn every 30 minutes), but
instead will only be invoked when an LSA is
(re)originated due to a topology change. Addi-
tionally, this trap does not include LSAs that
are being flushed because they have reached
MaxAge."
::= { ospfTraps 12 }
ospfMaxAgeLsa NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfLsdbAreaId, -- 0.0.0.0 for AS Externals
ospfLsdbType,
ospfLsdbLsid,
ospfLsdbRouterId
}
STATUS current
DESCRIPTION
"An ospfMaxAgeLsa trap signifies that one of
the LSA in the router's link-state database has
aged to MaxAge."
::= { ospfTraps 13 }
Baker & Coltun Standards Track [Page 76]
RFC 1850 OSPF MIB November 1995
ospfLsdbOverflow NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfExtLsdbLimit
}
STATUS current
DESCRIPTION
"An ospfLsdbOverflow trap signifies that the
number of LSAs in the router's link-state data-
base has exceeded ospfExtLsdbLimit."
::= { ospfTraps 14 }
ospfLsdbApproachingOverflow NOTIFICATION-TYPE
OBJECTS {
ospfRouterId, -- The originator of the trap
ospfExtLsdbLimit
}
STATUS current
DESCRIPTION
"An ospfLsdbApproachingOverflow trap signifies
that the number of LSAs in the router's link-
state database has exceeded ninety percent of
ospfExtLsdbLimit."
::= { ospfTraps 15 }
-- conformance information
ospfTrapConformance OBJECT IDENTIFIER ::= { ospfTrap 3 }
ospfTrapGroups OBJECT IDENTIFIER ::= { ospfTrapConformance 1 }
ospfTrapCompliances OBJECT IDENTIFIER ::= { ospfTrapConformance 2 }
-- compliance statements
ospfTrapCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement "
MODULE -- this module
MANDATORY-GROUPS { ospfTrapControlGroup }
GROUP ospfTrapControlGroup
DESCRIPTION
"This group is optional but recommended for all
OSPF systems"
Baker & Coltun Standards Track [Page 77]
RFC 1850 OSPF MIB November 1995
::= { ospfTrapCompliances 1 }
-- units of conformance
ospfTrapControlGroup OBJECT-GROUP
OBJECTS {
ospfSetTrap,
ospfConfigErrorType,
ospfPacketType,
ospfPacketSrc
}
STATUS current
DESCRIPTION
"These objects are required to control traps
from OSPF systems."
::= { ospfTrapGroups 1 }
END
6. Acknowledgements
This document was produced by the OSPF Working Group.
7. References
[1] Cerf, V., "IAB Recommendations for the Development of Internet
Network Management Standards", RFC 1052, NRI, April 1988.
[2] Cerf, V., "Report of the Second Ad Hoc Network Management Review
Group", RFC 1109, NRI, August 1989.
[3] Rose M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based internets", STD 16, RFC
1155, Performance Systems International, Hughes LAN Systems, May
1990.
[4] McCloghrie K., and M. Rose, "Management Information Base for
Network Management of TCP/IP-based internets", RFC 1156, Hughes
LAN Systems, Performance Systems International, May 1990.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, SNMP Research,
Performance Systems International, Performance Systems
International, MIT Laboratory for Computer Science, May 1990.
Baker & Coltun Standards Track [Page 78]
RFC 1850 OSPF MIB November 1995
[6] Rose M., Editor, "Management Information Base for Network
Management of TCP/IP-based internets: MIB-II", STD 17, RFC 1213,
Performance Systems International, March 1991.
[7] Information processing systems - Open Systems Interconnection -
Specification of Abstract Syntax Notation One (ASN.1),
International Organization for Standardization, International
Standard 8824, December 1987.
[8] Information processing systems - Open Systems Interconnection -
Specification of Basic Encoding Rules for Abstract Notation One
(ASN.1), International Organization for Standardization,
International Standard 8825, December 1987.
[9] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
STD 16, RFC 1212, Performance Systems International, Hughes LAN
Systems, March 1991.
[10] Rose, M., Editor, "A Convention for Defining Traps for use with
the SNMP", RFC 1215, Performance Systems International, March
1991.
[11] Steinberg, L., "Techniques for Managing Asynchronously Generated
Alerts", RFC 1224, IBM Corporation, May 1991.
[12] Moy, J., "Multicast Extensions to OSPF", RFC 1584, Proteon, Inc.,
September 1993.
Baker & Coltun Standards Track [Page 79]
RFC 1850 OSPF MIB November 1995
8. Security Considerations
Security issues are not discussed in this memo.
9. Authors' Addresses
Fred Baker
cisco Systems, Inc.
519 Lado Drive
Santa Barbara, CA 93111
Phone: (805) 681-0115
EMail: fred@cisco.com
Rob Coltun
RainbowBridge Communications
Phone: (301) 340-9416
EMail: rcoltun@rainbow-bridge.com
Baker & Coltun Standards Track [Page 80]