Reference Guide

468 | Border Gateway Protocol
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Table 2 show ip bgp neighbors Command Fields
Lines beginning with Description
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, then 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 This line displays the following information:
• 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 This line 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 The line displays the number of BGP messages sent, the number of
notifications (error messages) and the number of messages waiting in
a queue for processing.
Received updates This line displays the number of BGP updates received and sent.
Minimum time Displays the minimum time, in seconds, between advertisements.
(list of inbound and outbound
policies)
Displays the policy commands configured and the names of the Route
map, AS-PATH ACL or Prefix list configured for the policy.
For address family: Displays IPv6 Unicast as the address family.
BGP table version Displays the which version of the primary BGP routing table the
router and the neighbor are using.
accepted prefixes Displays the number of network prefixes accepted by the router and
the amount of memory used to process those prefixes.
Prefix advertised Displays the number of network prefixes advertised, the number
rejected and the number withdrawn from the BGP routing table.
Connections established Displays the number of TCP connections established and dropped
between the two peers to exchange BGP information.
Last reset Displays the amount of time since the peering session was last reset.
Also states if the peer resets the peering session.
If the peering session was never reset, the word never is displayed.
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.