Use route-map to change the metric of a route when you accept a remote IS-IS route with IS-IS accept policies.
You can use route-map to change the metric of a route when you redistribute the route from another protocol to IS-IS through the route redistribution mechanism.
You can also configure the route metric with the base redistribute command without the use of route-map.
Note
For both IPv4 and IPv6 IS-IS accept policies, if there is a mismatch in the route-map (inbound filtering) configured, all routes are accepted by default. Unlike the redistribute route-map (outbound filtering), where if there is a mismatch, all routes are denied by default. For more information, see IP routing operations fundamentals.
For IPv4, see IP routing operations fundamentals.
For IPv6, see IPv6 Routing Basics.