Command Line Reference Guide

266 | Border Gateway Protocol IPv4(BGPv4)
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BGPv4 Commands
Border Gateway Protocol (BGP) is an external gateway protocol that transmits interdomain routing
information within and between Autonomous Systems (AS). BGP version 4 (BGPv4) supports
Classless InterDomain Routing (CIDR) and the aggregation of routes and AS paths. Basically, two
routers (called neighbors or peers) exchange information including full routing tables and periodically
send messages to update those routing tables.
The following commands enable you to configure and enable BGP.
• address-family
• aggregate-address
• bgp always-compare-med
• bgp asnotation
• bgp bestpath as-path ignore
• bgp bestpath med confed
• bgp bestpath med missing-as-best
• bgp bestpath router-id ignore
• bgp client-to-client reflection
• bgp cluster-id
• bgp confederation identifier
• bgp confederation peers
• bgp dampening
• bgp default local-preference
• bgp enforce-first-as
• bgp fast-external-fallover
• bgp four-octet-as-support
• bgp graceful-restart
• bgp log-neighbor-changes
• bgp non-deterministic-med
• bgp recursive-bgp-next-hop
• bgp regex-eval-optz-disable
• bgp router-id
• bgp soft-reconfig-backup
• capture bgp-pdu neighbor
• capture bgp-pdu max-buffer-size
• clear ip bgp
• clear ip bgp dampening
• clear ip bgp flap-statistics
• debug ip bgp
• debug ip bgp dampening
Note: FTOS Version 7.7.1 supports 2-Byte (16-bit) and 4-Byte (32-bit) format for Autonomous System Numbers
(ASNs), where the 2-Byte format is 1-65535, the 4-Byte format is 1-4294967295.
Note: FTOS Version 8.3.1.0 supports Dotted format as well as the Traditional Plain format for AS Numbers. The
dot format is displayed when using the
show ip bgp commands. To determine the comparable dot format for an
ASN from a traditional format, use ASN/65536. ASN%65536.
For more information about using the 2 or 4-Byte format, refer to the FTOS Configuration Guide.