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router bgp 2
neighbor 1.1.1.2 remote-as 1
neighbor 1.1.1.2 no shutdown
neighbor 2.2.2.2 remote-as 1
neighbor 2.2.2.2 no shutdown
neighbor 3.3.3.2 remote-as 1
neighbor 3.3.3.2 no shutdown
bfd all-neighbors
The following example shows viewing all BFD neighbors.
The following example shows viewing BFD neighbors with full detail.
The bold lines show the BFD session parameters: TX (packet transmission), RX (packet reception), and multiplier (maximum number of
missed packets).
The following example shows viewing congured BFD counters.
The following example shows viewing BFD summary information.
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 100 Min_rx 100 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 specied neighbor.
The bold lines show the message displayed when you enable a BFD session with dierent congurations:
• Message displays when you enable a BFD session with a BGP neighbor that inherits the global BFD session settings congured 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)
Bidirectional Forwarding Detection (BFD)
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