Concept Guide

Lines Beginning
With
Description
BGP table version Displays which version of the primary BGP routing table the router and the neighbor are
using.
Prexes accepted Displays the number of network prexes accepted by the router and the amount of
memory used to process those prexes.
Prexes advertised Displays the number of network prexes 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withdrawn from the BGP routing table.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
6 keepalives, 0 route refresh requests
Sent 48 messages, 0 in queue
3 opens, 2 notifications, 0 updates
43 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 IPv6 Unicast :
MULTIPROTO_EXT(1)
ROUTE_REFRESH(2)
CISCO_ROUTE_REFRESH(128)
Capabilities advertised to neighbor for IPv6 Unicast :
MULTIPROTO_EXT(1)
ROUTE_REFRESH(2)
CISCO_ROUTE_REFRESH(128)
For address family: IPv6 Unicast
BGP table version 12, neighbor version 12
2 accepted prefixes consume 32 bytes
Prefixes accepted 1 (consume 4 bytes), withdrawn 0 by peer
Prefixes advertised 0, rejected 0, withdrawn 0 from peer
Connections established 3; dropped 2
Last reset 00:00:39, due to Closed by neighbor
Notification History
'OPEN error/Bad AS' Sent : 0 Recv: 1
Local host: 5ffe:10::4, Local port: 179
Foreign host: 5ffe:10::3, Foreign port: 35470
Notification History
'Connection Reset' Sent : 1 Recv: 0
IPv6 Border Gateway Protocol (IPv6 BGP)
729