Reference Guide

● 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 configured 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
notifications (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 notifications (error
messages), and the number of messages waiting in a queue for processing.
● Description — Displays the descriptive name configured for the BGP neighbor. This field is
displayed only when the description is configured.
● 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
Description: n1_abcd
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
Example
advertised-
routes
OS10# show ip bgp ipv6 unicast neighbors 192:168:1::2 advertised-routes
BGP local router ID is 100.1.1.1
Status codes: s suppressed, S stale, d dampened, h history, * valid, >
best
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>55::/64 192:168:1::1 0 0 0 100i
Layer 3 331