Reference Guide

Command Mode EXEC
Usage Information
• BGP neighbor — Displays the BGP neighbor address and its AS number. The last phrase in the line indicates
whether the link between the BGP router and its neighbor is an external or internal one. If they are located in
the same AS, the link is internal; otherwise the link is external.
• BGP version — Displays the BGP version (always version 4) and the remote router ID.
•
BGP state — Displays the neighbor’s BGP state and the amount of time in hours:minutes: seconds it has
been in that state.
• Last read — Displays the information included in the last read:
• Last read is the time (hours:minutes: seconds) the router read a message from its neighbor.
• Hold time is the number of seconds congured between messages from its neighbor.
• Keepalive interval is the number of seconds between keepalive messages to help ensure that the TCP
session is still alive.
• Received messages — Displays the number of BGP messages received, the number of notications (error
messages), and the number of messages waiting in a queue for processing.
• Sent messages — Displays the number of BGP messages sent, the number of notications (error
messages), and the number of messages waiting in a queue for processing.
• Local host — Displays the peering address of the local router and the TCP port number.
• Foreign host — Displays the peering address of the neighbor and the TCP port number.
Although the status codes for routes received from a BGP neighbor may not display in show ip bgp
neighbors ip-address received-routes output, they display correctly in show ip bgp output.
Example
OS10# show ip bgp neighbors
BGP neighbor is 80.1.1.2, remote AS 800, local AS 102 external link
BGP version 4, remote router ID 12.12.0.2
BGP state ESTABLISHED, in this state for 00:02:51
Last read 00:18:23 seconds
Hold time is 90, keepalive interval is 30 seconds
Configured hold time is 180, keepalive interval is 60 seconds
Fall-over disabled
Received 11 messages
1 opens, 0 notifications, 3 updates
7 keepalives, 0 route refresh requests
Sent 8 messages
1 opens, 0 notifications, 0 updates
7 keepalives, 0 route refresh requests
Minimum time between advertisement runs is 30 seconds
Capabilities received from neighbor for IPv4 Unicast:
MULTIPROTO_EXT(1)MULTIPROTO_EXT(1)MULTIPROTO_EXT(1)ROUTE_REFRESH(2)
Capabilities advertised to neighbor for IPv4 Unicast:
MULTIPROTO_EXT(1)MULTIPROTO_EXT(1)ROUTE_REFRESH(2)CISCO_ROUTE_REFRESH
(128)4_OCTET_AS(65)
Prefixes accepted 5, Prefixes advertised 0
Connections established 1; dropped 1
Closed by neighbor sent 00:02:51 ago
For address family: IPv4 Unicast
Next hop set to self
Allow local AS number 0 times in AS-PATH attribute
For address family: IPv6 Unicast
Next hop set to self
Allow local AS number 0 times in AS-PATH attribute
Local host: 80.1.1.1, Local port: 57812
Foreign host: 80.1.1.2, Foreign port: 179
298
Layer 3