Setup Guide

The bold line shows the message displayed when you enable BFD for BGP connections.
R2# show ip bgp summary
BGP router identifier 10.0.0.1, local AS number 2
BGP table version is 0, main routing table version 0
BFD is enabled, Interval 200 Min_rx 200 Multiplier 3 Role Active
3 neighbor(s) using 24168 bytes of memory
Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/Pfx
1.1.1.2 1 282 281 0 0 0 00:38:12 0
2.2.2.2 1 273 273 0 0 (0) 04:32:26 0
3.3.3.2 1 282 281 0 0 0 00:38:12 0
The following example shows viewing BFD information for a specied neighbor.
The bold lines show the message displayed when you enable a BFD session with dierent congurations:
• Message displays when you enable a BFD session with a BGP neighbor that inherits the global BFD session settings congured with
the global bfd all-neighbors command.
• Message displays when you enable a BFD session with a BGP neighbor using the neighbor ip-address bfd command.
• Message displays when you enable a BGP neighbor in a peer group for which you enabled a BFD session using the neighbor peer-
group-name bfd command
R2# show ip bgp neighbors 2.2.2.2
BGP neighbor is 2.2.2.2, remote AS 1, external link
BGP version 4, remote router ID 12.0.0.4
BGP state ESTABLISHED, in this state for 00:05:33
Last read 00:00:30, last write 00:00:30
Hold time is 180, keepalive interval is 60 seconds
Received 8 messages, 0 in queue
1 opens, 0 notifications, 0 updates
7 keepalives, 0 route refresh requests
Sent 9 messages, 0 in queue
2 opens, 0 notifications, 0 updates
7 keepalives, 0 route refresh requests
Minimum time between advertisement runs is 30 seconds
Minimum time before advertisements start is 0 seconds
Capabilities received from neighbor for IPv4 Unicast :
MULTIPROTO_EXT(1)
ROUTE_REFRESH(2)
CISCO_ROUTE_REFRESH(128)
Capabilities advertised to neighbor for IPv4 Unicast :
MULTIPROTO_EXT(1)
ROUTE_REFRESH(2)
CISCO_ROUTE_REFRESH(128)
Neighbor is using BGP global mode BFD configuration
For address family: IPv4 Unicast
BGP table version 0, neighbor version 0
Prefixes accepted 0 (consume 0 bytes), withdrawn 0 by peer, martian prefixes ignored 0
Prefixes advertised 0, denied 0, withdrawn 0 from peer
Connections established 1; dropped 0
Last reset never
Local host: 2.2.2.3, Local port: 63805
Foreign host: 2.2.2.2, Foreign port: 179
E1200i_R2#
R2# show ip bgp neighbors 2.2.2.3
BGP neighbor is 2.2.2.3, remote AS 1, external link
Member of peer-group pg1 for session parameters
BGP version 4, remote router ID 12.0.0.4
172
Bidirectional Forwarding Detection (BFD)