BGP4-MIB DEFINITIONS ::= BEGIN

    IMPORTS

        MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,

        IpAddress, Integer32, Counter32, Gauge32, mib-2

            FROM SNMPv2-SMI

        MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP

            FROM SNMPv2-CONF;

    bgp MODULE-IDENTITY

        LAST-UPDATED "200601110000Z"

        ORGANIZATION "IETF IDR Working Group"

        CONTACT-INFO "E-mail:  idr@ietf.org

                      Jeffrey Haas, Susan Hares  (Editors)

                      NextHop Technologies

                      825 Victors Way

                      Suite 100

                      Ann Arbor, MI 48108-2738

                      Tel: +1 734 222-1600

                      Fax: +1 734 222-1602

                      E-mail: jhaas@nexthop.com

                              skh@nexthop.com"

        DESCRIPTION

                "The MIB module for the BGP-4 protocol.

                 Copyright (C) The Internet Society (2006).  This

                 version of this MIB module is part of RFC 4273;

                 see the RFC itself for full legal notices."

        REVISION "200601110000Z"

        DESCRIPTION

               "Changes from RFC 1657:

                1) Fixed the definitions of the notifications

                   to make them equivalent to their initial

                   definition in RFC 1269.

                2) Added compliance and conformance info.

                3) Updated information for the values of

                   bgpPeerNegotiatedVersion, bgp4PathAttrLocalPref,

                   bgp4PathAttrCalcLocalPref,

                   bgp4PathAttrMultiExitDisc,

                   bgp4PathAttrASPathSegement.

                4) Added additional clarification comments where

                   needed.

                5) Noted where objects do not fully reflect

                   the protocol as Known Issues.

                6) Updated the DESCRIPTION for the

                   bgp4PathAttrAtomicAggregate object.

                7) The following objects have had their DESCRIPTION

                   clause modified to remove the text that suggested

                   (using 'should' verb) initializing the counter

                   to zero on a transition to the established state:

                     bgpPeerInUpdates, bgpPeerOutUpdates,

                     bgpPeerInTotalMessages, bgpPeerOutTotalMessages

                   Those implementations that still do this are

                   still compliant with this new wording.

                   Applications should not assume counters have

                   started at zero.

                 Published as RFC 4273."

        REVISION "199405050000Z"

        DESCRIPTION

                "Translated to SMIv2 and published as RFC 1657."

        REVISION "199110261839Z"

        DESCRIPTION

                "Initial version, published as RFC 1269."

        ::= { mib-2 15 }

    bgpVersion OBJECT-TYPE

        SYNTAX     OCTET STRING (SIZE (1..255))

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "Vector of supported BGP protocol version

                 numbers.  Each peer negotiates the version

                 from this vector.  Versions are identified

                 via the string of bits contained within this

                 object.  The first octet contains bits 0 to

                 7, the second octet contains bits 8 to 15,

                 and so on, with the most significant bit

                 referring to the lowest bit number in the

                 octet (e.g., the MSB of the first octet

                 refers to bit 0).  If a bit, i, is present

                 and set, then the version (i+1) of the BGP

                 is supported."

        REFERENCE

                "RFC 4271, Section 4.2."

        ::= { bgp 1 }

    bgpLocalAs OBJECT-TYPE

        SYNTAX     Integer32 (0..65535)

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The local autonomous system number."

        REFERENCE

                 "RFC 4271, Section 4.2, 'My Autonomous System'."

        ::= { bgp 2 }

    -- BGP Peer table.  This table contains, one entry per

    -- BGP peer, information about the BGP peer.

    bgpPeerTable OBJECT-TYPE

        SYNTAX     SEQUENCE OF BgpPeerEntry

        MAX-ACCESS not-accessible

        STATUS     current

        DESCRIPTION

                "BGP peer table.  This table contains,

                 one entry per BGP peer, information about the

                 connections with BGP peers."

        ::= { bgp 3 }

    bgpPeerEntry OBJECT-TYPE

        SYNTAX     BgpPeerEntry

        MAX-ACCESS not-accessible

        STATUS     current

        DESCRIPTION

                "Entry containing information about the

                 connection with a BGP peer."

        INDEX { bgpPeerRemoteAddr }

        ::= { bgpPeerTable 1 }

    BgpPeerEntry ::= SEQUENCE {

            bgpPeerIdentifier

                IpAddress,

            bgpPeerState

                INTEGER,

            bgpPeerAdminStatus

                INTEGER,

            bgpPeerNegotiatedVersion

                Integer32,

            bgpPeerLocalAddr

                IpAddress,

            bgpPeerLocalPort

                Integer32,

            bgpPeerRemoteAddr

                IpAddress,

            bgpPeerRemotePort

                Integer32,

            bgpPeerRemoteAs

                Integer32,

            bgpPeerInUpdates

                Counter32,

            bgpPeerOutUpdates

                Counter32,

            bgpPeerInTotalMessages

                Counter32,

            bgpPeerOutTotalMessages

                Counter32,

            bgpPeerLastError

                OCTET STRING,

            bgpPeerFsmEstablishedTransitions

                Counter32,

            bgpPeerFsmEstablishedTime

                Gauge32,

            bgpPeerConnectRetryInterval

                Integer32,

            bgpPeerHoldTime

                Integer32,

            bgpPeerKeepAlive

                Integer32,

            bgpPeerHoldTimeConfigured

                Integer32,

            bgpPeerKeepAliveConfigured

                Integer32,

            bgpPeerMinASOriginationInterval

                Integer32,

            bgpPeerMinRouteAdvertisementInterval

                Integer32,

            bgpPeerInUpdateElapsedTime

                Gauge32

            }

    bgpPeerIdentifier OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The BGP Identifier of this entry's BGP peer.

                 This entry MUST be 0.0.0.0 unless the

                 bgpPeerState is in the openconfirm or the

                 established state."

        REFERENCE

                "RFC 4271, Section 4.2, 'BGP Identifier'."

        ::= { bgpPeerEntry 1 }

    bgpPeerState OBJECT-TYPE

        SYNTAX     INTEGER {

                            idle(1),

                            connect(2),

                            active(3),

                            opensent(4),

                            openconfirm(5),

                            established(6)

                   }

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The BGP peer connection state."

        REFERENCE

                "RFC 4271, Section 8.2.2."

        ::= { bgpPeerEntry 2 }

    bgpPeerAdminStatus OBJECT-TYPE

        SYNTAX     INTEGER {

                            stop(1),

                            start(2)

                   }

        MAX-ACCESS read-write

        STATUS     current

        DESCRIPTION

                "The desired state of the BGP connection.

                 A transition from 'stop' to 'start' will cause

                 the BGP Manual Start Event to be generated.

                 A transition from 'start' to 'stop' will cause

                 the BGP Manual Stop Event to be generated.

                 This parameter can be used to restart BGP peer

                 connections.  Care should be used in providing

                 write access to this object without adequate

                 authentication."

        REFERENCE

                "RFC 4271, Section 8.1.2."

        ::= { bgpPeerEntry 3 }

    bgpPeerNegotiatedVersion OBJECT-TYPE

        SYNTAX     Integer32

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The negotiated version of BGP running between

                 the two peers.

                 This entry MUST be zero (0) unless the

                 bgpPeerState is in the openconfirm or the

                 established state.

                 Note that legal values for this object are

                 between 0 and 255."

        REFERENCE

                "RFC 4271, Section 4.2.

                 RFC 4271, Section 7."

        ::= { bgpPeerEntry 4 }

    bgpPeerLocalAddr OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The local IP address of this entry's BGP

                 connection."

        ::= { bgpPeerEntry 5 }

    bgpPeerLocalPort OBJECT-TYPE

        SYNTAX     Integer32 (0..65535)

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The local port for the TCP connection between

                 the BGP peers."

        ::= { bgpPeerEntry 6 }

    bgpPeerRemoteAddr OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The remote IP address of this entry's BGP

                 peer."

        ::= { bgpPeerEntry 7 }

    bgpPeerRemotePort OBJECT-TYPE

        SYNTAX     Integer32 (0..65535)

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The remote port for the TCP connection

                 between the BGP peers.  Note that the

                 objects bgpPeerLocalAddr,

                 bgpPeerLocalPort, bgpPeerRemoteAddr, and

                 bgpPeerRemotePort provide the appropriate

                 reference to the standard MIB TCP

                 connection table."

        ::= { bgpPeerEntry 8 }

    bgpPeerRemoteAs OBJECT-TYPE

        SYNTAX     Integer32 (0..65535)

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The remote autonomous system number received in

                 the BGP OPEN message."

        REFERENCE

                "RFC 4271, Section 4.2."

        ::= { bgpPeerEntry 9 }

    bgpPeerInUpdates OBJECT-TYPE

        SYNTAX     Counter32

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The number of BGP UPDATE messages

                 received on this connection."

        REFERENCE

                "RFC 4271, Section 4.3."

        ::= { bgpPeerEntry 10 }

    bgpPeerOutUpdates OBJECT-TYPE

        SYNTAX     Counter32

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The number of BGP UPDATE messages

                 transmitted on this connection."

        REFERENCE

                "RFC 4271, Section 4.3."

        ::= { bgpPeerEntry 11 }

    bgpPeerInTotalMessages OBJECT-TYPE

        SYNTAX     Counter32

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The total number of messages received

                 from the remote peer on this connection."

        REFERENCE

                "RFC 4271, Section 4."

        ::= { bgpPeerEntry 12 }

    bgpPeerOutTotalMessages OBJECT-TYPE

        SYNTAX     Counter32

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The total number of messages transmitted to

                 the remote peer on this connection."

        REFERENCE

                "RFC 4271, Section 4."

        ::= { bgpPeerEntry 13 }

    bgpPeerLastError OBJECT-TYPE

        SYNTAX     OCTET STRING (SIZE (2))

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The last error code and subcode seen by this

                 peer on this connection.  If no error has

                 occurred, this field is zero.  Otherwise, the

                 first byte of this two byte OCTET STRING

                 contains the error code, and the second byte

                 contains the subcode."

        REFERENCE

                "RFC 4271, Section 4.5."

        ::= { bgpPeerEntry 14 }

    bgpPeerFsmEstablishedTransitions OBJECT-TYPE

        SYNTAX     Counter32

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The total number of times the BGP FSM

                 transitioned into the established state

                 for this peer."

        REFERENCE

                "RFC 4271, Section 8."

        ::= { bgpPeerEntry 15 }

    bgpPeerFsmEstablishedTime OBJECT-TYPE

        SYNTAX     Gauge32

        UNITS      "seconds"

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "This timer indicates how long (in

                 seconds) this peer has been in the

                 established state or how long

                 since this peer was last in the

                 established state.  It is set to zero when

                 a new peer is configured or when the router is

                 booted."

        REFERENCE

                "RFC 4271, Section 8."

        ::= { bgpPeerEntry 16 }

    bgpPeerConnectRetryInterval OBJECT-TYPE

        SYNTAX     Integer32 (1..65535)

        UNITS      "seconds"

        MAX-ACCESS read-write

        STATUS     current

        DESCRIPTION

                "Time interval (in seconds) for the

                 ConnectRetry timer.  The suggested value

                 for this timer is 120 seconds."

        REFERENCE

                "RFC 4271, Section 8.2.2.  This is the value used

                 to initialize the 'ConnectRetryTimer'."

        ::= { bgpPeerEntry 17 }

    bgpPeerHoldTime OBJECT-TYPE

        SYNTAX     Integer32  ( 0 | 3..65535 )

        UNITS      "seconds"

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "Time interval (in seconds) for the Hold

                 Timer established with the peer.  The

                 value of this object is calculated by this

                 BGP speaker, using the smaller of the

                 values in bgpPeerHoldTimeConfigured and the

                 Hold Time received in the OPEN message.

                 This value must be at least three seconds

                 if it is not zero (0).

                 If the Hold Timer has not been established

                 with the peer this object MUST have a value

                 of zero (0).

                 If the bgpPeerHoldTimeConfigured object has

                 a value of (0), then this object MUST have a

                 value of (0)."

        REFERENCE

                "RFC 4271, Section 4.2."

        ::= { bgpPeerEntry 18 }

    bgpPeerKeepAlive OBJECT-TYPE

        SYNTAX     Integer32 ( 0 | 1..21845 )

        UNITS      "seconds"

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "Time interval (in seconds) for the KeepAlive

                 timer established with the peer.  The value

                 of this object is calculated by this BGP

                 speaker such that, when compared with

                 bgpPeerHoldTime, it has the same proportion

                 that bgpPeerKeepAliveConfigured has,

                 compared with bgpPeerHoldTimeConfigured.

                 If the KeepAlive timer has not been established

                 with the peer, this object MUST have a value

                 of zero (0).

                 If the of bgpPeerKeepAliveConfigured object

                 has a value of (0), then this object MUST have

                 a value of (0)."

        REFERENCE

                "RFC 4271, Section 4.4."

        ::= { bgpPeerEntry 19 }

    bgpPeerHoldTimeConfigured OBJECT-TYPE

        SYNTAX     Integer32 ( 0 | 3..65535 )

        UNITS      "seconds"

        MAX-ACCESS read-write

        STATUS     current

        DESCRIPTION

                "Time interval (in seconds) for the Hold Time

                 configured for this BGP speaker with this

                 peer.  This value is placed in an OPEN

                 message sent to this peer by this BGP

                 speaker, and is compared with the Hold

                 Time field in an OPEN message received

                 from the peer when determining the Hold

                 Time (bgpPeerHoldTime) with the peer.

                 This value must not be less than three

                 seconds if it is not zero (0).  If it is

                 zero (0), the Hold Time is NOT to be

                 established with the peer.  The suggested

                 value for this timer is 90 seconds."

        REFERENCE

                "RFC 4271, Section 4.2.

                 RFC 4271, Section 10."

        ::= { bgpPeerEntry 20 }

    bgpPeerKeepAliveConfigured OBJECT-TYPE

        SYNTAX     Integer32 ( 0 | 1..21845 )

        UNITS      "seconds"

        MAX-ACCESS read-write

        STATUS     current

        DESCRIPTION

                "Time interval (in seconds) for the

                 KeepAlive timer configured for this BGP

                 speaker with this peer.  The value of this

                 object will only determine the

                 KEEPALIVE messages' frequency relative to

                 the value specified in

                 bgpPeerHoldTimeConfigured; the actual

                 time interval for the KEEPALIVE messages is

                 indicated by bgpPeerKeepAlive.  A

                 reasonable maximum value for this timer

                 would be one third of that of

                 bgpPeerHoldTimeConfigured.

                 If the value of this object is zero (0),

                 no periodical KEEPALIVE messages are sent

                 to the peer after the BGP connection has

                 been established.  The suggested value for

                 this timer is 30 seconds."

        REFERENCE

                "RFC 4271, Section 4.4.

                 RFC 4271, Section 10."

        ::= { bgpPeerEntry 21 }

    bgpPeerMinASOriginationInterval OBJECT-TYPE

        SYNTAX     Integer32 (1..65535)

        UNITS      "seconds"

        MAX-ACCESS read-write

        STATUS     current

        DESCRIPTION

                "Time interval (in seconds) for the

                 MinASOriginationInterval timer.

                 The suggested value for this timer is 15

                 seconds."

        REFERENCE

                "RFC 4271, Section 9.2.1.2.

                 RFC 4271, Section 10."

        ::= { bgpPeerEntry 22 }

    bgpPeerMinRouteAdvertisementInterval OBJECT-TYPE

        SYNTAX     Integer32 (1..65535)

        UNITS      "seconds"

        MAX-ACCESS read-write

        STATUS     current

        DESCRIPTION

                "Time interval (in seconds) for the

                 MinRouteAdvertisementInterval timer.

                 The suggested value for this timer is 30

                 seconds for EBGP connections and 5

                 seconds for IBGP connections."

        REFERENCE

                "RFC 4271, Section 9.2.1.1.

                 RFC 4271, Section 10."

        ::= { bgpPeerEntry 23 }

    bgpPeerInUpdateElapsedTime OBJECT-TYPE

        SYNTAX     Gauge32

        UNITS      "seconds"

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "Elapsed time (in seconds) since the last BGP

                 UPDATE message was received from the peer.

                 Each time bgpPeerInUpdates is incremented,

                 the value of this object is set to zero (0)."

        REFERENCE

                "RFC 4271, Section 4.3.

                 RFC 4271, Section 8.2.2, Established state."

        ::= { bgpPeerEntry 24 }

    bgpIdentifier OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The BGP Identifier of the local system."

        REFERENCE

                "RFC 4271, Section 4.2."

        ::= { bgp 4 }

    -- BGP Received Path Attribute Table.  This table contains

    -- one entry per path to a network, and path attributes

    -- received from all peers running BGP version 3 or less.

    -- This table is obsolete, having been replaced in

    -- functionality by the bgp4PathAttrTable.

    bgpRcvdPathAttrTable OBJECT-TYPE

        SYNTAX     SEQUENCE OF BgpPathAttrEntry

        MAX-ACCESS not-accessible

        STATUS     obsolete

        DESCRIPTION

                "The BGP Received Path Attribute Table

                 contains information about paths to

                 destination networks, received from all

                 peers running BGP version 3 or less."

        ::= { bgp 5 }

    bgpPathAttrEntry OBJECT-TYPE

        SYNTAX     BgpPathAttrEntry

        MAX-ACCESS not-accessible

        STATUS     obsolete

        DESCRIPTION

                "Information about a path to a network."

        INDEX { bgpPathAttrDestNetwork,

                bgpPathAttrPeer        }

        ::= { bgpRcvdPathAttrTable 1 }

    BgpPathAttrEntry ::= SEQUENCE {

        bgpPathAttrPeer

             IpAddress,

        bgpPathAttrDestNetwork

             IpAddress,

        bgpPathAttrOrigin

             INTEGER,

        bgpPathAttrASPath

             OCTET STRING,

        bgpPathAttrNextHop

             IpAddress,

        bgpPathAttrInterASMetric

             Integer32

    }

    bgpPathAttrPeer OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     obsolete

        DESCRIPTION

                "The IP address of the peer where the path

                 information was learned."

        ::= { bgpPathAttrEntry 1 }

    bgpPathAttrDestNetwork OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     obsolete

        DESCRIPTION

                "The address of the destination network."

        REFERENCE

                "RFC 1267, Section 4.3."

        ::= { bgpPathAttrEntry 2 }

    bgpPathAttrOrigin OBJECT-TYPE

        SYNTAX     INTEGER {

                       igp(1),-- networks are interior

                       egp(2),-- networks learned via the

                              -- EGP protocol

                       incomplete(3) -- networks that

                              -- are learned by some other

                              -- means

                   }

        MAX-ACCESS read-only

        STATUS     obsolete

        DESCRIPTION

                "The ultimate origin of the path information."

        REFERENCE

                "RFC 1267, Section 4.3.

                 RFC 1267, Section 5."

        ::= { bgpPathAttrEntry 3 }

    bgpPathAttrASPath OBJECT-TYPE

        SYNTAX     OCTET STRING (SIZE (2..255))

        MAX-ACCESS read-only

        STATUS     obsolete

        DESCRIPTION

                "The set of ASes that must be traversed to reach

                 the network.  This object is probably best

                 represented as SEQUENCE OF INTEGER.  For SMI

                 compatibility, though, it is represented as

                 OCTET STRING.  Each AS is represented as a pair

                 of octets according to the following algorithm:

                    first-byte-of-pair = ASNumber / 256;

                    second-byte-of-pair = ASNumber & 255;"

        REFERENCE

                "RFC 1267, Section 4.3.

                 RFC 1267, Section 5."

        ::= { bgpPathAttrEntry 4 }

    bgpPathAttrNextHop OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     obsolete

        DESCRIPTION

                "The address of the border router that should

                 be used for the destination network."

        REFERENCE

                "RFC 1267, Section 4.3.

                 RFC 1267, Section 5."

        ::= { bgpPathAttrEntry 5 }

    bgpPathAttrInterASMetric OBJECT-TYPE

        SYNTAX     Integer32

        MAX-ACCESS read-only

        STATUS     obsolete

        DESCRIPTION

                "The optional inter-AS metric.  If this

                 attribute has not been provided for this route,

                 the value for this object is 0."

        REFERENCE

                "RFC 1267, Section 4.3.

                 RFC 1267, Section 5."

        ::= { bgpPathAttrEntry 6 }

    -- BGP-4 Received Path Attribute Table.  This table

    -- contains one entry per path to a network, and path

    -- attributes received from all peers running BGP-4.

    bgp4PathAttrTable OBJECT-TYPE

        SYNTAX     SEQUENCE OF Bgp4PathAttrEntry

        MAX-ACCESS not-accessible

        STATUS     current

        DESCRIPTION

                "The BGP-4 Received Path Attribute Table

                 contains information about paths to

                 destination networks, received from all

                 BGP4 peers."

        ::= { bgp 6 }

    bgp4PathAttrEntry OBJECT-TYPE

        SYNTAX     Bgp4PathAttrEntry

        MAX-ACCESS not-accessible

        STATUS     current

        DESCRIPTION

                "Information about a path to a network."

        INDEX { bgp4PathAttrIpAddrPrefix,

                bgp4PathAttrIpAddrPrefixLen,

                bgp4PathAttrPeer            }

        ::= { bgp4PathAttrTable 1 }

    Bgp4PathAttrEntry ::= SEQUENCE {

        bgp4PathAttrPeer

             IpAddress,

        bgp4PathAttrIpAddrPrefixLen

             Integer32,

        bgp4PathAttrIpAddrPrefix

             IpAddress,

        bgp4PathAttrOrigin

             INTEGER,

        bgp4PathAttrASPathSegment

             OCTET STRING,

        bgp4PathAttrNextHop

             IpAddress,

        bgp4PathAttrMultiExitDisc

             Integer32,

        bgp4PathAttrLocalPref

             Integer32,

        bgp4PathAttrAtomicAggregate

             INTEGER,

        bgp4PathAttrAggregatorAS

             Integer32,

        bgp4PathAttrAggregatorAddr

             IpAddress,

        bgp4PathAttrCalcLocalPref

             Integer32,

        bgp4PathAttrBest

             INTEGER,

        bgp4PathAttrUnknown

             OCTET STRING

    }

    bgp4PathAttrPeer OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The IP address of the peer where the path

                 information was learned."

        ::= { bgp4PathAttrEntry 1 }

    bgp4PathAttrIpAddrPrefixLen OBJECT-TYPE

        SYNTAX     Integer32 (0..32)

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "Length in bits of the IP address prefix in

                 the Network Layer Reachability

                 Information field."

        ::= { bgp4PathAttrEntry 2 }

    bgp4PathAttrIpAddrPrefix OBJECT-TYPE

        SYNTAX     IpAddress

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "An IP address prefix in the Network Layer

                 Reachability Information field.  This object

                 is an IP address containing the prefix with

                 length specified by

                 bgp4PathAttrIpAddrPrefixLen.

                 Any bits beyond the length specified by

                 bgp4PathAttrIpAddrPrefixLen are zeroed."

        REFERENCE

                "RFC 4271, Section 4.3."

        ::= { bgp4PathAttrEntry 3 }

    bgp4PathAttrOrigin OBJECT-TYPE

        SYNTAX     INTEGER {

                       igp(1),-- networks are interior

                       egp(2),-- networks learned via the

                              -- EGP protocol

                       incomplete(3) -- networks that

                              -- are learned by some other

                              -- means

                   }

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The ultimate origin of the path

                 information."

        REFERENCE

                "RFC 4271, Section 4.3.

                 RFC 4271, Section 5.1.1."

        ::= { bgp4PathAttrEntry 4 }

    bgp4PathAttrASPathSegment OBJECT-TYPE

        SYNTAX     OCTET STRING (SIZE (2..255))

        MAX-ACCESS read-only

        STATUS     current

        DESCRIPTION

                "The sequence of AS path segments.  Each AS

                 path segment is represented by a triple

                 <type, length, value>.

                 The type is a 1-octet field that has two

                 possible values:

                     1      AS_SET: unordered set of ASes that a

                                 route in the UPDATE message

                                 has traversed

                     2      AS_SEQUENCE: ordered set of ASes that

                                 a route in the UPDATE message

                                 has traversed.

                 The length is a 1-octet field containing the

                 number of ASes in the value field.

                 The value field contains one or more AS

                 numbers.  Each AS is represented in the octet

                 string as a pair of octets according to the

                 following algorithm:

                    first-byte-of-pair = ASNumber / 256;

                    second-byte-of-pair = ASNumber & 255;

                 Known Issues:

                 o BGP Confederations will result in

                   a type of either 3 or 4.

                 o An AS Path may be longer than 255 octets.

                   This may result in this object containing