Please can any one explain in brief when I need to apply the 'ip policy route-map' command at the interface when doing route-map.
Is it when I am using it for redistribution or packet redirection. Or both.
As pointed by Lejoe "ip policy route-map" is the command used with respect to Policy Based Routing.
PBR has two configuration parts - Creating Policy and applying the policy on the interface.
You create policy using "route-map name" command and apply it on an interface using "ip policy route-map name" command
interface fa 0/0
ip policy route-map xyz
match ip address 10.10.10.12
set ip next-hop 18.104.22.168
PBR is always matched for inbound traffic on an interface.