BGP Optimal Route Reflection (BGP-ORR) for IS-IS

You can configure BGP Optimal Route Reflection (BGP-ORR) with IS-IS as the interior gateway protocol (IGP) to enable BGP-ORR in that BGP peer group. You can configure one of the client nodes as the primary node (igp-primary), which is used to select the best path. You can also select a backup node (igp-backup).