we are using multiple routers running BGP with static route with 200 AD as a backup connection. we're using "bgp fast-external-fallover" command to not wait for hold timer in failover scenario and switch to static route immediately. all routers with 15.x version switch to static route immediately, except one router 3845 with 12.4(24)T5 version. it takes 3 min to switch to static route. also after apply this command "bgp fast-external-fallover", still I can't see this command in "show run all | sec bgp". is there any bug with with release ? any suggestion would be very appreciated.