BigIron RX Series Configuration Guide 42953-1001986-01Configuring optional VSRP parameters 15Changing the hello intervalThe Master periodically sends Hello messages to the Backups. To change the Hello interval, entera command such as the following at the configuration level for the VRID.BigIron RX(config-vlan-200-vrid-1)# hello-interval 10Syntax: [no] hello-interval The <units> parameter specifies the interval which and can be from 1 – 84 units. The default is 1(1 unit = 100 milliseconds).NOTEThe 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 Backups.NOTEIf you change the timer scale, the change affects the actual number of seconds.Changing the dead intervalThe Dead interval is the number of milliseconds a Backup waits for a Hello message from theMaster before determining that the Master is dead. The default is 300 milliseconds. This is threetimes the default Hello interval.To change the Dead interval, enter a command such as the following at the configuration level forthe VRID.BigIron RX(config-vlan-200-vrid-1)# dead-interval 30Syntax: [no] dead-interval The parameter specifies the interval which and can be from 3 – 84 units (1 unit = 100milliseconds). The default is 3 (3 units = 300 milliseconds).NOTEIf you change the timer scale, the change affects the actual number of seconds.Changing the backup hello state and intervalBy default, Backups do not send Hello messages to advertise themselves to the Master. You canenable these messages if desired and also change the message interval.To enable a Backup to send Hello messages to the Master, enter a command such as the followingat the configuration level for the VRID.BigIron RX(config-vlan-200-vrid-1)# advertise backupSyntax: [no] advertise backupWhen a Backup is enabled to send Hello messages, the Backup sends a Hello message to theMaster every 6 seconds by default. You can change the interval to be up to 360 seconds.To change the Backup Hello interval, enter a command such as the following at the configurationlevel for the VRID.BigIron RX(config-vlan-200-vrid-1)# backup-hello-interval 180
