3Com Switch 8800 Configuration Guide Chapter 20 Integrated IS-IS Configuration20-1520.2.13 Configuring IS-IS Route Metric TypeIS-IS routing protocol has two styles of route metric:z Narrow: The value of route metric ranges from 1 to 63.z 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.Table 20-14 Configure the style for route metric values of IS-IS packetsOperation CommandConfigure the style for routemetric values of IS-IS packetscost-style { narrow | wide | wide-compatible |{ compatible | narrow-compatible }[ relax-spf-limit ] }Restore the default settings undo cost-styleBy default, IS-IS only receives and sends the packets whose route metric is in narrowstyle.20.2.14 Setting IS-IS Link State Routing CostUsers can configure the interface cost, namely, the default routing cost.Perform the following configuration in interface view.Table 20-15 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 theinterface undo isis cost [ level-1 | level-2 ]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 10.20.2.15 Configuring IS-IS TimersI. Setting the Hello packet broadcast intervalThe IS-IS periodically sends the Hello packets from the interface and the routersmaintain the adjacency through the transmitting/receiving of the Hello packets TheHello packet interval can be modified.
