3Com Switch 8800 Configuration Guide Chapter 18 RIP Configuration18-7II. Configuring RIP to filter the routes advertised by RIPTable 18-8 Configure RIP to filter the advertised routesOperation CommandConfigure RIP to filter theadvertised routing informationfilter-policy { acl-number | ip-prefixip-prefix-name } export [ routing-protocol ]Cancel filtering the advertisedrouting informationundo filter-policy { acl-number | ip-prefixip-prefix-name } export [ routing-protocol ]By default, RIP does not filter the received and advertised routing information.Note:z The filter-policy import command filters the RIP routes received from its neighbors,and the routes that cannot pass the filter will not be added to the routing table, andwill not be advertised to the neighbors.z The filter-policy export command filters all the advertised routes, including routesimported by the import-route command, and RIP routes learned from theneighbors.z If the filter-policy export command does not specify which route to be filtered, thenall the routes imported by the import-route command and the advertised RIProutes will be filtered.18.2.8 Disabling RIP to Receive Host RouteIn some special cases, the router can receive a lot of host routes, and these routes areof little help in route addressing but consume a lot of network resources. Routers canbe configured to reject host routes by using the undo host-route command.Perform the following configuration in RIP view.Table 18-9 Disable RIP to receive host routeOperation CommandEnable receiving host route host-routeDisable receiving host route undo host-routeBy default, the router receives the host route.
