BGP4V2-MIB

OBJECT-IDENTITY

OBJECT-IDENTITY

OBJECT-TYPE

BGP peer table. This table contains, one entry per BGP peer, information about the connections with BGP peers.

OBJECT-TYPE

Entry containing information about the connection with a remote BGP peer.

OBJECT-TYPE

The routing instance index. Some BGP implementations permit the creation of multiple instances of a BGP routing process. An example includes routers running BGP/MPLS IP Virtual Private Networks. Implementations that do not support multiple routing instances should return 1 for this object.

OBJECT-TYPE

The address family of the local end of the peering session.

OBJECT-TYPE

The local IP address of this entry's BGP connection.

OBJECT-TYPE

The address family of the remote end of the peering session.

OBJECT-TYPE

The remote IP address of this entry's BGP peer.

OBJECT-TYPE

The local port for the TCP connection between the BGP peers.

OBJECT-TYPE

Some implementations of BGP can represent themselves as multiple ASes. This is the AS that this peering session is representing itself as to the remote peer.

OBJECT-TYPE

The BGP Identifier of the local system for this peering session. It is REQUIRED that all bgp4V2PeerLocalIdentifier values for the same bgp4V2PeerInstance be identical.

OBJECT-TYPE

The remote port for the TCP connection between the BGP peers. Note that the objects bgp4V2PeerLocalAddr, bgp4V2PeerLocalPort, bgp4V2PeerRemoteAddr and bgp4V2PeerRemotePort provide the appropriate reference to the standard MIB TCP connection table, or even the ipv6 TCP MIB as in RFC 4022.

OBJECT-TYPE

The remote autonomous system number received in the BGP OPEN message.

OBJECT-TYPE

The BGP Identifier of this entry's remote BGP peer. This entry should be 0.0.0.0 unless the bgp4V2PeerState is in the openconfirm or the established state.

OBJECT-TYPE

Whether or not the BGP FSM for this remote peer is halted or running. The BGP FSM for a remote peer is halted after processing a Stop event. Likewise, it is in the running state after a Start event. The bgp4V2PeerState will generally be in the idle state when the FSM is halted, although some extensions such as Graceful Restart will leave the peer in the Idle state but with the FSM running.

OBJECT-TYPE

The BGP peer connection state.

OBJECT-TYPE

A user configured description identifying this peer. When this object is not the empty string, this object SHOULD contain a description that is unique within a given BGP instance for this peer.

OBJECT-TYPE

On a per-peer basis, this table reflects the last protocol-defined error encountered and reported on the peer session.

OBJECT-TYPE

Each entry contains information about errors sent and received for a particular BGP peer.

OBJECT-TYPE

The last error code received from this peer via NOTIFICATION message on this connection. If no error has occurred, this field is zero.

OBJECT-TYPE

The last subcode received from this peer via NOTIFICATION message on this connection. If no error has occurred, this field is zero.

OBJECT-TYPE

The timestamp that the last NOTIFICATION was received from this peer.

OBJECT-TYPE

This object contains an implementation specific explanation of the error that was reported.

OBJECT-TYPE

The last error code's data seen by this peer. Per RFC 2578, some implementations may have limitations dealing with OCTET STRINGS larger than 255. Thus, this data may be truncated.

OBJECT-TYPE

The last error code sent to this peer via NOTIFICATION message on this connection. If no error has occurred, this field is zero.

OBJECT-TYPE

The last subcode sent to this peer via NOTIFICATION message on this connection. If no error has occurred, this field is zero.

OBJECT-TYPE

The timestamp that the last NOTIFICATION was sent to this peer.

OBJECT-TYPE

This object contains an implementation specific explanation of the error that is being reported.

OBJECT-TYPE

The last error code's data sent to this peer. Per RFC 2578, some implementations may have limitations dealing with OCTET STRINGS larger than 255. Thus, this data may be truncated.

OBJECT-TYPE

A table reporting the per-peering session amount of time elapsed and update events since the peering session advanced into the established state.

OBJECT-TYPE

Each row contains a set of statistics about time spent and events encountered in the peer session established state.

OBJECT-TYPE

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. If the peer has never reached the established state, the value remains zero.

OBJECT-TYPE

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).

OBJECT-TYPE

The BGP-4 Received Path Attribute Table contains information about paths to destination networks received from all BGP4 peers. Collectively, this represents the Adj-Ribs-In. The route where bgp4V2NlriBest is true represents, for this NLRI, the route that is installed in the LocRib from the Adj-Ribs-In.

OBJECT-TYPE

Information about a path to a network.

OBJECT-TYPE

This index allows for multiple instances of a base prefix for a certain AFI-SAFI from a given peer. This is currently useful for two things: 1. Allowing for a peer in future implementations to send more than a single route instance. 2. Allow for extensions which extend the NLRI field to send the same prefix while utilizing other extension specific information. An example of this is RFC 3107 - Carrying MPLS labels in BGP.

OBJECT-TYPE

The address family of the prefix for this NLRI. Note that the AFI is not necessarily equivalent to the an InetAddressType.

OBJECT-TYPE

The subsequent address family of the prefix for this NLRI

OBJECT-TYPE

The type of the IP address prefix in the Network Layer Reachability Information field. The value of this object is derived from the appropriate value from the bgp4V2NlriAfi field. Where an appropriate InetAddressType is not available, the value of the object must be unknown(0).

OBJECT-TYPE

An IP address prefix in the Network Layer Reachability Information field. This object is an IP address containing the prefix with length specified by bgp4V2NlriPrefixLen. Any bits beyond the length specified by bgp4V2NlriPrefixLen are zeroed.

OBJECT-TYPE

Length in bits of the address prefix in the Network Layer Reachability Information field.

OBJECT-TYPE

An indication of whether or not this route was chosen as the best BGP4 route for this destination.

OBJECT-TYPE

The degree of preference calculated by the receiving BGP4 speaker for an advertised route. In the case where this prefix is ineligible, the value of this object will be zero (0).

OBJECT-TYPE

The ultimate origin of the path information.

OBJECT-TYPE

The address family of the address for the border router that should be used to access the destination network.

OBJECT-TYPE

The address of the border router that should be used to access the destination network. This address is the nexthop address received in the UPDATE packet associated with this prefix. Note that for RFC2545 style double nexthops, this object will always contain the global scope nexthop. bgpPathAttrLinkLocalNextHop will contain the linklocal scope nexthop, if it is present. In the case a mechanism is developed to use only a link local nexthop, bgp4V2NlriNextHopAddr will contain the link local nexthop.

OBJECT-TYPE

The address type for IPv6 link local addresses. This is present only when receiving RFC 2545 style double nexthops. This object is optionally present in BGP implementations that do not support IPv6. When no IPv6 link local nexthop is present, the value of this object should be unknown(0).

OBJECT-TYPE

This value contains an IPv6 link local address and is present only when receiving RFC 2545 style double nexthops. This object is optionally present in BGP implementations that do not support IPv6. When no IPv6 link local nexthop is present, the length of this object should be zero.

OBJECT-TYPE

This value is true when the LOCAL_PREF value was sent in the UPDATE message.

OBJECT-TYPE

The originating BGP4 speakers degree of preference for an advertised route.

OBJECT-TYPE

This value is true when the MED value was sent in the UPDATE message.

OBJECT-TYPE

This metric is used to discriminate between multiple exit points to an adjacent autonomous system. When the MED value is absent but has a calculated default value, this object will contain the calculated value.

OBJECT-TYPE

This value is true when the ATOMIC_AGGREGATE Path Attribute is present and indicates that the NLRI MUST NOT be made more specific.

OBJECT-TYPE

This value is true when the AGGREGATOR path attribute was sent in the UPDATE message.

OBJECT-TYPE

The AS number of the last BGP4 speaker that performed route aggregation. When bgp4V2NlriAggregatorPresent is false, the value of this object should be zero (0).

OBJECT-TYPE

The IP address of the last BGP4 speaker that performed route aggregation. When bgp4V2NlriAggregatorPresent is false, the value of this object should be 0.0.0.0

OBJECT-TYPE

This value represents the calculated length of the AS Path according to the rules of the BGP specification. This value is used in route selection.

OBJECT-TYPE

This is a string depicting the autonomous system path to this network which was received from the peer which advertised it. The format of the string is implementation-dependent, and should be designed for operator readability. Note that SnmpAdminString is only capable of representing a maximum of 255 characters. This may lead to the string being truncated in the presence of a large AS Path. It is RECOMMENDED that when this object's contents will be truncated that the final 3 octets be reserved for the ellipses string, '...'. bgp4V2NlriAsPath may give access to the full AS Path.

OBJECT-TYPE

In order to provide a canonicalized form of the BGP-4 AS_PATH along with the human-readable bgp4V2NlriAsPathString, which may be truncated, this object contains the contents of the BGP-4 AS_PATH Path Attribute. This object may be parsed using the rules defined for Four-octet ASes as defined in RFC 4893. RFC 4271, Section 4.3, 'Path Attributes: b) AS_PATH' as amended by RFC 5065, Section 3 defines the general format of the AS_PATH path attribute and its code points. In brief, the AS_PATH is composed of a sequence of AS Segments. Each AS Segment is represented by a triple: <path segment type, path segment length, path segment value>. The path segment type and path segment length fields are one octet in length each. The path segment type field may be one of: 1 - AS_SET (RFC 4721, Section 4.3) 2 - AS_SEQUENCE (RFC 4721, Section 4.3) 3 - AS_CONFED_SEQUENCE (RFC 3065, Section 5) 4 - AS_CONFED_SET (RFC 3065, Section 5) The path segment length field contains the number of ASes (not the number of octets) in the path segment value field. The path segment value field contains one or more AS numbers, each encoded as a 4-octet length field in network byte order. Note that since an SNMP agent may truncate this object to less than its maximum theoretical length of 4072 octets users of this object should be prepared to deal with a truncated and thus malformed AS_PATH. It is RECOMMENDED that when such truncation would occur on the boundary of an encoded AS that the partial AS be discarded from this object and the object's size be adjusted accordingly. Further, it is also RECOMMENDED that when such truncation, either alone or in conjuction with the truncation of a partially encoded AS described previously, would yield an empty path segment value field that the path segment type and path segment length components of the truncated AS_PATH also be discarded and the object's size be adjusted accordingly.

OBJECT-TYPE

Path Attributes not understood by this implementation SHOULD be be presented in this object. Those Path Attributes use the type, length, value encoding documented in RFC 4271, Section 4.3, 'Path Attributes'. Note that since an SNMP agent may truncate this object to less than its maximum theoretical length of 4072 octets users of this object should be prepared to deal with a truncated and thus malformed Path Attribute.