3Com Switch 7750 SeriesCommand Reference Guide – Routing Protocol Chapter 4 Integrated IS-IS Configuration Commands4-23System View: return to User View with Ctrl+Z.[3Com] interface Vlan-interface 10[3Com-Vlan-interface10] isis timer csnp 15 level-24.1.25 isis timer helloSyntaxisis timer hello seconds [ level-1 | level-2 ]undo isis timer hello [ level-1 | level-2 ]ViewInterface viewParameterseconds: Interval in seconds for sending Hello packets, ranging from 3 to 255, withthe default as 10 seconds.level-1: Specifies the time interval for sending Level-1 Hello packets.level-2: Specifies the time interval for sending Level-2 Hello packets.If neither the level-1 keyword nor the level-2 keyword is specified, both the level-1interval and the level-2 interval are set.DescriptionUse the isis timer hello command to specify the time interval for sending thecorresponding level Hello packets.Use the undo isis timer hello command to resume the default value of 10 seconds.The hello time interval must be configured respectively for the Level-1 and Level-2packets on a broadcast network, because these two types of hello packets are sentseparately. A point-to-point link does not require this. The shorter the time interval is,the more system resources will be occupied to send Hello packets, so you shouldconfigure a proper time interval depending on the specific requirements.Related command: isis timer holding-multiplier.Example# Configure Level-2 Hello packets to be sent every 20 seconds over Vlan-interface10.<3Com> system-viewSystem View: return to User View with Ctrl+Z.[3Com] interface Vlan-interface 10[3Com-Vlan-interface10] isis timer hello 20 level-2
