Allied Telesis BGP4, VERSION 5.4.3-2.6 manual Configuring BGP Graceful Restart

BGP and BGP4+ Configuration

Configuring BGP Graceful Restart

Using BGP graceful restart, the data forwarding plane of the device can continue to process and forward packets even if the control plane, which is responsible for determining best paths, fails. The bgp graceful-restart (BGP and BGP4+) command on page 3.32 sets the maximum time that a graceful-restart neighbor waits to come back up after a restart. This value is applied to all neighbors unless you explicitly override it by configuring the corresponding value on the neighbor.

This example shows configuring BGP graceful restart.

AS100	AS200
1.1.1.1	1.1.1.2
Peer 1	Peer 2
	bgp_7

Peer 1

awplus(config)#

configure terminal Enter the Global Configuration mode.

awplus(config-router)#

router bgp 100 Define the BGP routing process. The number 100 specifies the AS number of Peer 1.

awplus(config-router)#

bgp graceful-restartrestart-timeConfigure the maximum time in seconds (180) required

180for neighbor(s) to restart.

awplus(config-router)#

bgp graceful-restartstalepath-timeConfigure the maximum time in seconds (150) to retain

150stale paths from the restarting neighbor(s).

awplus(config-router)#

bgp update-delay 120 Configure the maximum time in seconds (120) to defer initial route selection.

awplus(config-router)#

neighbor 1.1.1.2 remote-as 200 Specify the neighbor’s IP address (1.1.1.2) and the AS number of the neighbor (200).

awplus(config-router)#

neighbor 1.1.1.2 capability Specify the neighbor’s IP address (1.1.1.2) for which the

graceful-restartgraceful restart capability is supported.

Software Reference Supplement for SwitchBlade® x8112, x908, x900 and x610 Series Switches

2.18 AlliedWare PlusTM Operating System - Software Version 5.4.3-2.6 C613-50032-01 REV D