VRRP Configuration 557if it does not receive a VRRP packet from the master for the period specified by themaster-down-interval argument.Configuring the VLAN interfaces/Ethernet ports to be tracked for a backupgroupThe VLAN interface/Ethernet port tracking function expands the backup groupfunction. With this function enabled, the backup group function is provided notonly when the interface where the backup group resides fails, but also when otherinterfaces/Ethernet ports are unavailable. By executing the related command youcan track an interface/Ethernet port.When a tracked VLAN interface goes down, the priority of the switch owning theinterface will reduce automatically by a specified value (the value-reducedargument). If the switches with their priorities higher than that of the currentmaster switch exist in the backup group, a new master switch will be thendetermined.Similarly, when the tracked Ethernet port is down, the priority of its switch will bedegraded by value-reduced automatically. As a result, other switch in the backupgroup may have a higher priority than this switch and therefore take over the roleas a master switch.n ■ The Ethernet port tracked can be in or out of the VLAN in whose interface thebackup group resides.■ If a switch is the IP address owner, the VLAN interface/Ethernet port trackingfunction can not be enabled for the switch.■ If a tracked VLAN interface/Ethernet port goes down, when it is up again, thepriority of the corresponding switch is automatically restored.■ Each backup group can track up to eight VLAN interfaces/Ethernet ports.VRRP ConfigurationIntroduction to VRRPConfiguration TasksConfiguring a VirtualRouter IP addressTable 434 lists the operations to configure a virtual router IP address (suppose youhave correctly configured the mapping between the port and VLAN):Table 433 VRRP configuration tasksConfiguration Description Related sectionConfigure a virtual router IPaddressRequired “Configuring a Virtual Router IPaddress” on page 557Configure backupgroup-related parametersRequired “Configuring BackupGroup-Related Parameters” onpage 558Table 434 Configure a virtual router IP addressOperation Command DescriptionEnter system view system-view -
