ADTRAN AOS Version R10.1.0 Command Reference Manual page 2867

Command Reference Guide
bgp fast-external-failover
Use the bgp fast-external-failover command to enable the fast-external-failover feature for Border
Gateway Protocol (BGP) on either the default or nondefault VPN routing and forwarding (VRF) instance.
Use the no form of this command to disable this feature.
Syntax Description
No subcommands.
Default Values
By default, this command is enabled.
Command History
Release 8.1
Release 18.3
Functional Notes
The bgp fast-external-failover command can be used to enable fast-external-failover on either the default
or nondefault VRF instance. If the behavior is to be created on a nondefault VRF instance, the VRF
instance must first be created using the command
have created the nondefault VRF instance, you can configure the BGP settings for the VRF instance using
the command vrf <name> on page 2877
configure the BGP characteristics for the nondefault VRF instance RED1, enter the following commands:
(config)#vrf RED1 route-distinguisher ip 192.17.250.24:33
(config)#router bgp 100
(config-bgp)#vrf RED1
(config-bgp-vrf)#
For more information about VRF and Multi-VRF BGP configuration, refer to the configuration guides
Configuring IPv4 Multi-VRF in AOS (article number 2156) and Configuring BGP in AOS for Releases
18.03.00/R10.1.0 or Later (article number 3524) available online at https://supportforums.adtran.com.
When enabled, if the link interface over which the router is communicating with a BGP peer goes down, the
BGP session with that peer is immediately cleared. When failover is disabled and the link goes down, the
session is maintained until the BGP hold timer expires.
Usage Examples
The following example enables fast-external-failover on the default VRF instance:
(config)#router bgp 100
(config-bgp)#bgp fast-external-failover
60000CRG0-35E
Command was introduced.
Command was incorporated into Multi-VRF BGP functionality.
vrf <name> route-distinguisher on page
from the router's BGP Configuration mode. For example, to
Copyright © 2012 ADTRAN, Inc.
BGP Command Set
1460. Once you
2867