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Configuring BGP Configuring Redistribution
OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide December 2007 page 4-59
Configuring Redundant CMMs for Graceful Restart
On OmniSwitch devices in a redundant CMM configuration, during a CMM takeover/failover, inter-
domain routing is disrupted. Alcatel-Lucent Operating System BGP needs to retain forwarding informa-
tion, also help a peering router performing a BGP restart to support continuous forwarding for inter-
domain traffic flows by following the BGP graceful restart mechanism.
By default, BGP graceful restart is enabled. To configure BGP graceful restart support on OmniSwitch
switches, use the ip bgp graceful-restart command by entering ip bgp graceful-restart.
For example, to support BGP graceful restart, enter:
-> ip bgp graceful-restart
To configure the grace period (default is 90 seconds) for achieving a graceful BGP restart, use the ip bgp
graceful-restart restart-interval command, followed by the value in seconds.
For example, to configure a BGP graceful restart grace period as 300 seconds, enter:
-> ip bgp graceful-restart restart-interval 60
To disable support for graceful restart, use the no form of the ip bgp graceful-restart command by enter-
ing:
-> no ip bgp graceful-restart
For more information about graceful restart commands, see the “BGP Commands” chapter in the
OmniSwitch CLI Reference Guide.