RIP Route Control 293RIP Route Control In actual implementation, it may be needed to control RIP routing informationmore accurately to accommodate complex network environments. By performingthe configuration described in the following sections, you can:■ Control route selection by adjusting additional routing metrics on interfacesrunning RIP.■ Reduce the size of the routing table by setting route summary and disablingthe receiving of host routes.■ Filter the received routes.■ Set the preference of RIP to change the preference order of routing protocols.This order makes sense when more than one route to the same destination isdiscovered by multiple routing protocols.■ Speed up packet forwarding by enabling RIP traffic sharing across interfaces■ Import external routes in an environment with multiple routing protocols andfilter the advertised routes.ConfigurationPrerequisitesBefore configuring RIP route control, perform the following tasks:■ Configuring network layer addresses of interfaces so that adjacent nodes arereachable to each other at the network layer■ Configuring basic RIP functionsConfiguring RIP RouteControlSetting the additional routing metrics of an interfaceAdditional routing metric is the routing metric (hop count) added to the originalmetrics of RIP routes on an interface. It does not change the metric value of a RIProute in the routing table, but will be added for incoming or outgoing RIP routeson the interface.Specify RIP version on theinterfacerip version { 1 | 2 [ broadcast |multicast ] }OptionalBy default, the RIP versionon an interface is RIP-1, andthe interface can receiveRIP-1 and RIP-2 broadcastpackets but send only RIP-1packets. When specifyingthe RIP version on aninterface to RIP-2, you canalso specify the mode(broadcast or multicast) tosend RIP packets.Table 216 Specify the RIP version on an interfaceOperation Command DescriptionTable 217 Set additional routing metricOperation Command DescriptionEnter system view system-view -Enter interface view interface interface-typeinterface-number-
