Dell Configuration Guide for the S4048–ON System 9.14.2.6

Implementation Information

Although route maps are similar to ACLs and prefix lists in that they consist of a series of commands that contain a matching criterion and an action, route maps can modify parameters in matching packets.

ACLs and prefix lists can only drop or forward the packet or traffic. Route maps process routes for route redistribution. For example, a route map can be called to filter only specific routes and to add a metric.

Route maps also have an “implicit deny.” Unlike ACLs and prefix lists; however, where the packet or traffic is dropped, in route maps, if a route does not match any of the route map conditions, the route is not redistributed.

The implementation of route maps allows route maps with the no match or no set commands. When there is no match command, all traffic matches the route map and the set command applies.