PBR next hop verify availability
When employing policy-based routing (PBR), the set ip next-hop verify-availability
command can be used to verify the reachability of the next hop of a Route-map before the router performs policy routing to that next hop. This is achieved either using CDP or using object tracking.
Links:
https://forum.networklessons.com/t/how-to-configure-policy-based-routing/945/69?u=lagapides
https://networklessons.com/cisco/ccie-routing-switching/how-to-configure-policy-based-routing/