464 BigIron RX Series Configuration Guide53-1002253-01Configuring additional VRRP and VRRPE parameters17Suppression of RIP advertisements on backup routersfor the backup up interfaceNormally, a VRRP or VRRPE Backup includes route information for the virtual IP address in RIPadvertisements. As a result, other routers receive multiple paths for the Backup router and mightsometimes unsuccessfully use the path to the Backup router rather than the path to the Master.You can prevent the Backup routers from advertising route information for the interface on whichthey are defined by enabling suppression of the advertisements.To suppress RIP advertisements for interface on which a Backup router is defined in Router2, enterthe following commands.Router2(config)# router ripRouter2(config-rip-router)# use-vrrp-pathSyntax: use-vrrp-pathThe syntax is the same for VRRP and VRRPE.Hello intervalThe Master periodically sends Hello messages to the Backups. The Backups use the Hellomessages as verification that the Master is still on-line. If the Backup routers stop receiving theHello messages for the period of time specified by the Dead interval, the Backup routers determinethat the Master router is dead. At this point, the Backup router with the highest priority becomesthe new Master router.The default Dead interval is three times the Hello Interval plus one-half second. Generally, if youchange the Hello interval, you also should change the Dead interval on the Backup routers.To change the Hello interval on the Master to 10 seconds, enter the following commands.Router1(config)# inter e 1/6Router1(config-if-e10000-1/6)# ip vrrp vrid 1Router1(config-if-e10000-1/6-vrid-1)# hello-interval 10Syntax: hello-interval The Hello interval can be from 1 – 84 seconds. The default is 1 second.The syntax is the same for VRRP and VRRPE.Dead intervalThe Dead interval is the number of seconds a Backup waits for a Hello message from the Masterbefore determining that the Master is dead. When Backups determine that the Master is dead, theBackup with the highest priority becomes the new Master. The Dead interval can be from 1 – 84seconds. The default is 3.5 seconds. This is three times the default Hello interval (1 second) plusone-half second added by the router software. The software automatically adds one-half second tothe Dead interval value you enter.To change the Dead interval on a Backup to 30 seconds, enter the following commands.Router2(config)# inter e 1/5Router2(config-if-e10000-1/5)# ip vrrp vrid 1Router2(config-if-e10000-1/5-vrid-1)# dead-interval 30
