Layer 3 Routing Commands 1488Default ConfigurationThere is no default configuration for this command.Command ModeRoute Map modeUser GuidelinesA route-map statement used for policy based routing is configured as permitor deny. If the statement is marked as deny, traditional destination-basedrouting is performed on the packet meeting the match criteria. If thestatement is marked as permit and the packet meets all the match criteria,the set clauses in the route-map statement are applied. If no match is foundin the route-map, the packet is forwarded using the routing decision resultingfrom traditional destination-based routing. If the network administrator doesnot want to revert to normal forwarding but instead want to drop packets thatdo not match the specified criteria, a set clause routing the packets tointerface null0 may be configured as the last (highest numbered) route-map.Exampleconsole(config-route-map)#set interface null0set ip default next-hopUse this route map clause to override default entries in the routing table.Packets that can routed by an active explicit route in the routing table are notaffected by this clause. Use this command to set a list of default next-hop IPaddresses to be used if no explicit route for the packet’s destination addressappears in the routing table. If more than one IP address is specified, thereachable address in the list is used. Use the no form of this command toremove a set command from a route map.Syntaxset ip default next-hop ip-address [ip-address]no set ip default next-hop ip-address [ip-address]ip-address —The IP address of the next hop to which packets are routed. It must bethe address of an adjacent router.• ip-address—A maximum of 16 next-hop IP addresses can be specified.