Configure BFD for IS-IS Globally

BFD for IS-IS can be configured globally on interfaces where BFD has been configured.

1. Access global configuration mode.
   

   device# configure terminal

2. Access ISIS router configuration mode.
   

   device(config)# router isis

3. Enable BFD globally.
   

   device(config-isis-router)# bfd 

4. Specify the interval after which routes are withdrawn after a BFD session is declared down.
   

   device(config-isis-router)# bfd holdover-interval 12  

   This example specifies a holdover interval of 12 seconds.