438 BigIron RX Series Configuration Guide53-1002253-01Configuring optional VSRP parameters15Syntax: [no] backup-hello-interval The parameter specifies the message interval and can be from 60 – 3600 units (1 unit =100 milliseconds). The default is 60 units (6000 milliseconds or 6 seconds).NOTEIf you change the timer scale, the change affects the actual number of seconds.Changing the hold-down intervalThe hold-down interval prevents Layer 2 loops from occurring during failover, by delaying the newMaster from forwarding traffic long enough to ensure that the failed Master is really unavailable.To change the Hold-down interval, enter a command such as the following at the configuration levelfor the VRID.BigIron RX(config-vlan-200-vrid-1)# hold-down-interval 4Syntax: [no] hold-down-interval The parameter specifies the hold-down interval and can be from 2 – 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 default track priorityWhen you configure a VRID to track the link state of other interfaces, if one of the tracked interfacegoes down, the software changes the VSRP priority of the VRID interface.The software reduces the VRID priority by the amount of the priority of the tracked interface thatwent down. For example, if the VSRP interface’s priority is 100 and a tracked interface with trackpriority 60 goes down, the software changes the VSRP interface’s priority to 40. If another trackedinterface goes down, the software reduces the VRID’s priority again, by the amount of the trackedinterface’s track priority.The default track priority for all track ports is 1. You can change the default track priority oroverride the default for an individual track port:• To change the default track priority, use the backup track-priority command, described below.• To override the default track priority for a specific track port, use the track-port command.Refer to “Specifying a track port” on page 439.To change the track priority, enter a command such as the following at the configuration level forthe VRID.BigIron RX(config-vlan-200-vrid-1)# backup track-priority 2Syntax: [no] backup [priority ] [track-priority <value>]
