Dell Force10 E300, Configuration Manual, Page: 223 / 1262

Border Gateway Protocol IPv4 (BGPv4) | 223
Local-as is prepended before the route-map to give an impression that update passed thru a router in AS
200 before it reached Router B.
BGP4 Management Information Base (MIB)
The FORCE10-BGP4-V2-MIB enhances FTOS BGP Management Information Base (MIB) support with
many new SNMP objects and notifications (traps) defined in the
draft-ietf-idr-bgp4-mibv2-05 . To see these
enhancements, download the MIB from the Dell Force10 website, www.force10networks.com.
Important Points to Remember
• In f10BgpM2AsPathTableEntry table, f10BgpM2AsPathSegmentIndex, and
f10BgpM2AsPathElementIndex are used to retrieve a particular ASN from the AS path. These indices
are assigned to the AS segments and individual ASN in each segment starting from 0. For example, an
AS path list of {200 300 400} 500 consists of two segments: {200 300 400} with segment index 0 and
500 with segment index 1. ASN 200, 300, and 400 are be assigned 0, 1, and 2 element indices in that
order.
• Unknown optional transitive attributes within a given path attribute (PA) are assigned indices in order.
These indices correspond to f10BgpM2PathAttrUnknownIndex field in the
f10BgpM2PathAttrUnknownEntry table.
• Negotiation of multiple instances of the same capability is not supported.
F10BgpM2PeerCapAnnouncedIndex and f10BgpM2PeerCapReceivedIndex are ignored in the peer
capability lookup.
• Inbound BGP soft-reconfiguration must be configured on a peer for
f10BgpM2PrefixInPrefixesRejected to display the number of prefixes filtered due to a policy. If BGP
soft-reconfig is not enabled, the denied prefixes are not accounted for.
• F10BgpM2AdjRibsOutRoute stores the pointer to the NLRI in the peer's Adj-Rib-Out.
• PA Index (f10BgpM2PathAttrIndex field in various tables) is used to retrieve specific attributes from
the PA table. The Next-Hop, RR Cluster-list, Originator ID attributes are not stored in the PA Table
and cannot be retrieved using the index passed in. These fields are not populated in
f10BgpM2PathAttrEntry, f10BgpM2PathAttrClusterEntry, f10BgpM2PathAttrOriginatorIdEntry.
• F10BgpM2PathAttrUnknownEntry contains the optional-transitive attribute details.
• Query for f10BgpM2LinkLocalNextHopEntry returns default value for Link-local Next-hop.
• RFC 2545 and the f10BgpM2Rfc2545Group are not supported.
• An SNMP query will display up to 89 AS paths. A query for a larger AS path count will display as
"…" at the end of the output.
• SNMP set for BGP is not supported. For all peer configuration tables
(f10BgpM2PeerConfigurationGroup, f10BgpM2PeerRouteReflectorCfgGroup, and
f10BgpM2PeerAsConfederationCfgGroup), an SNMP set operation will return an error. Only SNMP
queries are supported. In addition, the f10BgpM2CfgPeerError, f10BgpM2CfgPeerBgpPeerEntry, and
f10BgpM2CfgPeerRowEntryStatus fields are to hold the SNMP set status and are ignored in SNMP
query.
Note: See the Dell Force10 iSupport webpage for the
Force10-BGP4-V2-MIB
and other MIB
documentation.