Reference Guide
• To return all values on an snmpwalk for the
f10BgpM2Peer sub-OID
, use the -C c option, such as snmpwalk
-v 2c -C c -c public<IP_address><OID>.
• An SNMP walk may terminate pre-maturely if the index does not increment lexicographically. Dell Networking
recommends using options to ignore such errors.
• Multiple BPG process instances are not supported. Thus, the
f10BgpM2PeerInstance
field in various tables is
not used to locate a peer.
• Multiple instances of the same NLRI in the BGP RIB are not supported and are set to zero in the SNMP query
response.
• The
f10BgpM2NlriIndex
and
f10BgpM2AdjRibsOutIndex
fields are not used.
• Carrying MPLS labels in BGP is not supported. The
f10BgpM2NlriOpaqueType
and
f10BgpM2NlriOpaquePointer
fields are set to zero.
• 4-byte ASN is supported. The
f10BgpM2AsPath4byteEntry
table contains 4-byte ASN-related parameters based
on the configuration.
Traps (notifications) specified in the BGP4 MIB draft <draft-ietf-idr-bgp4–mibv2–05.txt> are not
supported. Such traps (
bgpM2Established
and
bgpM2BackwardTransition
) are supported as part of RFC 1657.
Configuration Information
The software supports BGPv4 as well as the following:
• deterministic multi-exit discriminator (MED) (default)
• a path with a missing MED is treated as worst path and assigned an MED value of (0xffffffff)
• the community format follows RFC 1998
• delayed configuration (the software at system boot reads the entire configuration file prior to sending messages
to start BGP peer sessions)
The following are not yet supported:
• auto-summarization (the default is no auto-summary)
• synchronization (the default is no synchronization)
BGP Configuration
To enable the BGP process and begin exchanging information, assign an AS number and use commands in ROUTER
BGP mode to configure a BGP neighbor.
By default, BGP is disabled.
By default, FTOS compares the MED attribute on different paths from within the same AS (the bgp always-
compare-med command is not enabled).
NOTE: In FTOS, all newly configured neighbors and peer groups are disabled. To enable a neighbor or peer group,
enter the neighbor {ip-address | peer-group-name} no shutdown command.
The following table displays the default values for BGP on FTOS.
Table 7. BGP Default Values
Item Default
BGP Neighbor Adjacency changes All BGP neighbor changes are logged.
Fast External Fallover feature Enabled
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