Configuring Integrated IS-IS 349The default route generated by this command will only be imported to the routerat the same level.Setting the Preferenceof IS-IS ProtocolIn a router on which several routing protocols are concurrently operating, there isan issue of sharing and selecting the routing information among all the routingprotocols. The system sets a preference for each routing protocol. When variousrouting protocols find the route to the same destination, the protocol with thehigher preference will take effect.Perform the following configuration in IS-IS view.By default, the preference of IS-IS route is 15.Configuring IS-IS RouteMetric TypeIS-IS routing protocol has two styles of route metric:■ Narrow: The value of route metric ranges from 1 to 63.■ Wide: The value of route metric ranges from 1 to 16,777,215.A router can choose either or both of the styles.Perform the following configuration in IS-IS view.By default, IS-IS only receives and sends the packets whose route metric is innarrow style.Setting IS-IS Link StateRouting CostUsers can configure the interface cost, namely, the default routing cost.Perform the following configuration in interface view.If the level is not specified, the default setting is Level-1 routing cost.The value argument is configured according to the link state of the interface.By default, the routing cost of IS-IS on an interface is 10.Table 320 Configure the preference of IS-IS protocolOperation CommandConfigure the preference of IS-IS protocol preference valueRestore the default preference of IS-IS protocol undo preferenceTable 321 Configure the style for route metric values of IS-IS packetsOperation CommandConfigure the style for route metricvalues of IS-IS packetscost-style { narrow | wide | wide-compatible | {compatible | narrow-compatible } [ relax-spf-limit ] }Restore the default settings undo cost-styleTable 322 Set IS-IS link state routing costOperation CommandSet the routing cost of the interface isis cost value [ level-1 | level-2 ]Restore the default routing cost of the interface undo isis cost [ level-1 | level-2 ]
