Reference Guide

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
4. Add a remote AS in ROUTER-NEIGHBOR mode, from 1 to 65535 for 2-byte or 1 to 4294967295 for 4-byte.
remote-as as-number
5. Enable the BGP neighbor in ROUTER-NEIGHBOR mode.
no shutdown
6. (Optional) Add a description text for the neighbor in ROUTER-NEIGHBOR mode.
description text
To reset the configuration when you change the configuration of a BGP neighbor, use the clear ip bgp * command. To
view the BGP status, use the show ip bgp summary command.
Configure BGP
OS10# configure terminal
OS10(config)# router bgp 100
OS10(config-router-bgp-100)# vrf blue
OS10(config-router-vrf)# neighbor 5.1.1.1
OS10(config-router-neighbor)# remote-as 1
OS10(config-router-neighbor)# description n1_abcd
OS10(config-router-neighbor)# exit
OS10(config-router-vrf)# template t1
OS10(config-router-template)# description peer_template_1_abcd
Configure Dual Stack
OS10 supports dual stack for BGPv4 and BGPv6. Dual stack BGP allows simultaneous exchange of same IPv4 or IPv6 prefixes
through different IPv4 and IPv6 peers. You can enable dual stack using the activate command in the corresponding address-
family mode. By default, activate command is enabled for the IPv4 address family for all the neighbors.
If a BGP-v4 neighbor wants to carry ipv6 prefix information, it activates the IPv6 address-family. For a BGP-v6 neighbor to
carry ipv4 prefix, it activates the IPv4 address-family.
1. Enable support for the IPv6 unicast family in CONFIG-ROUTER-BGP mode.
address family ipv6 unicast
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Layer 3