Configuring graceful shutdown for a BGP4 peer group

Configuring graceful shutdown for a BGP4 peer group minimizes traffic loss during a planned shutdown of the peer group by rerouting traffic to an alternate path before the shutdown.

1. From privileged EXEC mode, enter global configuration mode.
   

   device# configure terminal

2. Enable BGP routing.
   

   device(config-rbridge-id-122)# router bgp

3. Configure the autonomous system number (ASN) in which your device resides.
   

   device(config-bgp-router)# local-as 1000

4. Add a peer group.
   

   device(config-bgp-router)# neighbor grp-1 peer-group

   This example configures a peer group named grp-1.
5. Configure graceful shutdown for the peer group.
   

   device(config-bgp-router)# neighbor grp-1 graceful-shutdown 600 community 20 

   This example configures graceful shutdown of the peer group named grp-1 after 600 seconds and sets the community attribute to 20. This command gracefully shuts down all the peers in a peer-group. When a route map is not specified, default graceful shutdown parameters are applied. When a route map is specified, only route-map parameters are applied.
6. Return to privileged EXEC mode.
   

   device(config-bgp-router)# end

7. Verify the configuration.
   

   device# show running-configuration router bgp
   
    router bgp
     local-as 1000
     neighbor grp-1 peer-group
     neighbor grp-1 graceful-shutdown 600 community 20
   !
   ! example truncated for brevity
   

Example

The following example shows how to configure graceful shutdown of a peer group named grp-1 after 600 seconds. The community attribute is also set to 20.

device# configure terminal	
device(config)# router bgp
device(config-bgp-router)# local-as 1000
device(config-bgp-router)# neighbor grp-1 peer-group
device(config-bgp-router)# neighbor grp-1 graceful-shutdown 600 community 20