Concept Guide

Table Of Contents
Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/Pfx
192.168.128.2 99 23 24 1 0 (0) 00:00:17 1
192.168.128.3 100 30 29 1 0 (0) 00:00:14 1
!
R1#show ip bgp neighbors
BGP neighbor is 192.168.128.2, remote AS 99, internal link
Member of peer-group AAA for session parameters
BGP version 4, remote router ID 192.168.128.2
BGP state ESTABLISHED, in this state for 00:00:37
Last read 00:00:36, last write 00:00:36
Hold time is 180, keepalive interval is 60 seconds
Received 23 messages, 0 in queue
2 opens, 0 notifications, 2 updates
19 keepalives, 0 route refresh requests
Sent 24 messages, 0 in queue
2 opens, 1 notifications, 2 updates
19 keepalives, 0 route refresh requests
Minimum time between advertisement runs is 5 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)
Update source set to Loopback 0
Peer active in peer-group outbound optimization
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1
Prefixes accepted 1 (consume 4 bytes), withdrawn 0 by peer
Prefixes advertised 1, denied 0, withdrawn 0 from peer
Connections established 2; dropped 1
Last reset 00:00:57, due to user reset
Notification History
'Connection Reset' Sent : 1 Recv: 0
Last notification (len 21) sent 00:00:57 ago
ffffffff ffffffff ffffffff ffffffff 00150306 00000000
Local host: 192.168.128.1, Local port: 179
Foreign host: 192.168.128.2, Foreign port: 65464
BGP neighbor is 192.168.128.3, remote AS 100, external link
Member of peer-group BBB for session parameters
BGP version 4, remote router ID 192.168.128.3
BGP state ESTABLISHED, in this state for 00:00:37
Last read 00:00:36, last write 00:00:36
Hold time is 180, keepalive interval is 60 seconds
Received 30 messages, 0 in queue
4 opens, 2 notifications, 4 updates
20 keepalives, 0 route refresh requests
Sent 29 messages, 0 in queue
4 opens, 1 notifications, 4 updates
20 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)
Capabilities received from neighbor for IPv4 Unicast :
MULTIPROTO_EXT(1)
ROUTE_REFRESH(2)
CISCO_ROUTE_REFRESH(128)
Update source set to Loopback 0
Peer active in peer-group outbound optimization
For address family: IPv4 Unicast
BGP table version 1, neighbor version 1
Prefixes accepted 1 (consume 4 bytes), withdrawn 0 by peer
Prefixes advertised 1, denied 0, withdrawn 0 from peer
216
Border Gateway Protocol IPv4 (BGPv4)