5-27On a broadcast link, Level-1 and Level-2 hello packets are advertised separately and therefore youneed to set a hello multiplier for each level. On a P2P link, Level-1 and Level-2 hello packets areadvertised in P2P hello packets, and you need not specify Level-1 or Level-2.Configuring a DIS Priority for an InterfaceOn an IS-IS broadcast network, a router should be elected as the DIS at a routing level. You canspecify a DIS priority at a level for an interface. The greater the interface’s priority is, the more likely itbecomes the DIS. If multiple routers in the broadcast network have the same highest DIS priority, therouter with the highest MAC address becomes the DIS.Follow these steps to specify a DIS priority for an interface:To do… Use the command… RemarksEnter system view system-view ––Enter interface view interface interface-typeinterface-number ––Specify a DIS priority for theinterfaceisis dis-priority value [ level-1 |level-2 ]Optional64 by defaultDisabling an Interface from Sending/Receiving IS-IS PacketsAfter disabled from sending and receiving hello packets, an interface cannot form any neighborrelationship, but can advertise directly connected networks in LSPs through other interfaces. By doingso, you can save bandwidth and CPU resources while ensuring other routers know networks directlyconnected to the interface.Follow these steps to disable an interface from sending and receiving IS-IS packets:To do… Use the command… RemarksEnter system view system-view ––Enter interface view interface interface-typeinterface-number ––Disable the interface from sendingand receiving IS-IS packets isis silentRequiredNot disabled by default
