Operation Manual – VRRP-HAH3C S7500 Series Ethernet Switches Chapter 1 VRRP Configuration1-6VRRP packets from the master after a specific period (determined by themaster-down-interval argument), they consider the master is down and initiates theprocess to determine the master switch.You can adjust the frequency in which a master sends VRRP packets by setting thecorresponding VRRP timers (that is, the adver-interval argument). Themaster-down-interval argument is usually three times of the adver-interval argument.Excessive network traffic or differences between the timers of different switches willresult in master-down-interval timing out and state changing abnormally. Suchproblems can be solved through prolonging the adver-interval and setting delay time. Ifyou configure the preemption delay for a backup switch, the switch preempts themaster after the period specified by the preemption delay if it does not receive a VRRPpacket from the master for the period specified by the master-down-interval argument.VI. Configuring the VLAN interfaces/Ethernet ports to be tracked for a backupgroupThe VLAN interface/Ethernet port tracking function expands the backup group function.With this function enabled, the backup group function is provided not only when theinterface where the backup group resides fails, but also when other interfaces/Ethernetports are unavailable. By executing the related command you can track aninterface/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-reduced argument). Ifthe switches with their priorities higher than that of the current master switch exist in thebackup group, a new master switch will be then determined.Note:z The Ethernet port tracked can be in or out of the VLAN in whose interface thebackup group resides.z If a switch is the IP address owner, the VLAN interface/Ethernet port trackingfunction can not be enabled for the switch.z If a tracked VLAN interface/Ethernet port goes down, when it is up again, the priorityof the corresponding switch is automatically restored.z Each backup group can track up to eight VLAN interfaces/Ethernet ports.1.2 VRRP Configuration1.2.1 VRRP Configuration Task ListComplete the following tasks to configure VRRP:
