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Note, however, that not all Policy-Based Routing commands can be fast-switched. In particular, the set ip default next-hop and set default interface commands are not supported. Furthermore, Fast Switching has only limited support for the set interface command. In particular, the destination interface must have route-caching enabled, or it must be a point-to-point link. And even if these conditions are true, the router still must check its routing table to ensure that the destination interface is valid, and this happens at the process level.


Cover of Cisco IOS Cookbook, 2nd Edition


Route-policing intricacies