HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 134

Specifying intervals for sending IS-IS hello and CSNP packets Step 1. Enter system view. 2. Enter interface view. 3. Specify the interval for sending hello packets. 4. Specify the interval for sending CSNP packets on the DIS of a broadcast network. Command system-view interface interface-type interface-number isis timer hello seconds [ level-1 | level-2 ] isis timer csnp seconds [ level-1 | level-2 ] Remarks N/A N/A The default setting is 10 seconds. The interval between hello packets sent by the DIS is 1/3 the hello interval set with the isis timer hello command. The default setting is 10 seconds. Specifying the IS-IS hello multiplier If a neighbor does not receive any hello packets from the router within the advertised hold time, it considers the router down and recalculates the routes. The hold time is the hello multiplier multiplied by the hello interval. On a broadcast link, Level-1 and Level-2 hello packets are advertised separately. You must set a hello multiplier for each level. On a P2P link, Level-1 and Level-2 hello packets are advertised in P2P hello packets. You do not need to specify Level-1 or Level-2. To specify the IS-IS hello multiplier: Step 1. Enter system view. 2. Enter interface view. 3. Specify the number of hello packets a neighbor must miss before it declares that the router is down. Command system-view interface interface-type interface-number isis timer holding-multiplier value [ level-1 | level-2 ] Remarks N/A N/A The default setting is 3. Configuring a DIS priority for an interface On a broadcast network, IS-IS must elect a router as the DIS at a routing level. You can specify a DIS priority at a level for an interface. The greater the interface's priority, the more likely it becomes the DIS. If multiple routers in the broadcast network have the same highest DIS priority, the router with the highest MAC address becomes the DIS. To configure a DIS priority for an interface: 123