Users Guide

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 reads 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 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.
Prefixes
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number withdrawn from the BGP routing table.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.
Example
Dell#show ip bgp ipv6 unicast neighbors
BGP neighbor is 5ffe:10::3, remote AS 1, external link
BGP version 4, remote router ID 5.5.5.3
BGP state ESTABLISHED, in this state for 00:00:32
Last read 00:00:32, last write 00:00:32
Hold time is 180, keepalive interval is 60 seconds
Received 1404 messages, 0 in queue
3 opens, 1 notifications, 1394 updates
922 IPv6 Border Gateway Protocol (IPv6 BGP)