Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.7 - Page 1556

set interface null0 Use this command to drop a packet instead of reverting to normal routing for packets that do not match the route map criteria. This command should be configured as the last entry in the route-map as no further set clauses will operate on a dropped packet. Use the no form of this command to remove the set clause from a route map. Syntax set interface null0 no set interface null0 • null0-Specifies the null0 interface used to drop packets. Default Configuration There is no default configuration for this command. Command Mode Route Map mode User Guidelines A route-map statement used for policy based routing is configured as permit or deny. If the statement is marked as deny, traditional destination-based routing is performed on the packet meeting the match criteria. If the statement 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 found in the route-map, the packet is forwarded using the routing decision resulting from traditional destination-based routing. If the network administrator does not want to revert to normal forwarding but instead want to drop packets that do not match the specified criteria, a set clause routing the packets to interface null0 may be configured as the last (highest numbered) route-map. Example console(config-route-map)#set interface null0 Layer 3 Routing Commands 1556