Users Guide

Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/Pfx
5.1.1.2 4294967295 0 0 0 0 0 00:00:00 Active
For the router ID, the system selects the first configured IP address or a random number. To view the status of BGP
neighbors, use the show ip bgp neighbors command. For BGP neighbor configuration information, use the show
running-config bgp command.
The example shows two neighbors — one is an external BGP neighbor; and the other is an internal BGP neighbor. The first line
of the output for each neighbor displays the AS number and states if the link is external or internal.
The third line of the show ip bgp neighbors output contains the BGP state. If anything other than established displays,
the neighbor is not exchanging information and routes. For more information, see IPv6 commands.
View BGP neighbors
OS10# show ip bgp neighbors
BGP neighbor is 5.1.1.1, remote AS 1, internal link
BGP version 4, remote router ID 6.1.1.1
BGP state established, in this state for 00:03:11
Last read 01:08:40 seconds, hold time is 180, keepalive interval is 60 seconds
Received 11 messages
3 opens, 1 notifications, 3 updates
4 keepalives, 0 route refresh requests
Sent 14 messages
3 opens, 1 notifications, 0 updates
10 keepalives, 0 route refresh requests
Minimum time between advertisement runs is 0 seconds
Description: n1_abcd
Capabilities received from neighbor for IPv4 Unicast:
MULTIPROTO_EXT(1)ROUTE_REFRESH(2)CISCO_ROUTE_REFRESH(128)
Capabilities advertised to neighbor for IPv4 Unicast:
MULTIPROTO_EXT(1)ROUTE_REFRESH(2)CISCO_ROUTE_REFRESH(128)
Prefixes accepted 3, Prefixes advertised 0
Connections established 3; dropped 2
Closed by neighbor sent 00:03:26 ago
Local host: 5.1.1.2, Local port: 43115
Foreign host: 5.1.1.1, Foreign port: 179
View BGP running configuration
OS10# show running-configuration bgp
!
router bgp 100
!
neighbor 5.1.1.1
description n1_abcd
Configuring BGP in a non-default VRF instance
To configure BGP in a non-default VRF instance.
1. Assign an AS number, and enter ROUTER-BGP mode from CONFIGURATION mode (1 to 65535 for 2-byte, 1 to 4294967295
for 4-byte). Only one AS number is supported per system. If you enter a 4-byte AS number, 4-byte AS support is enabled
automatically.
router bgp as-number
2. Enter ROUTER-BGP-VRF mode to configure BGP in a non-default VRF instance.
vrf vrf-name
3. Enter a neighbor in CONFIG-ROUTER-VRF mode.
neighbor ip-address
Layer 3
621