3Com MSR 30, MSR 50 manual Vrrp vrid priority

2232 CHAPTER 146: IPV4-BASED VRRP CONFIGURATION COMMANDS

resulting in frequent master/backup state transition of the standby group members. Preemption delay is introduced to solve this problem. With a preemption delay set, if the backup member does not receive the packet from the master member duly, it waits for a period to see whether it can receive any packet from the master. If the specified period elapses but it still receives no packet from the master, it becomes the master.

Note that before executing the command, you need to create a standby group on an interface and configure the virtual IP address of the standby group.

Example # Enable preemption on the router in VRRP standby group 1, and set the preemption delay to five seconds.

<Sysname> system-view

[Sysname] interface ethernet 1/0 [Sysname-Vlan-interface2] vrrp vrid 1 virtual-ip 10.1.1.1 [Sysname-Ethernet1/0] vrrp vrid 1 preempt-mode timer delay 5

vrrp vrid priority

Syntax vrrp vrid virtual-router-id priority priority-value undo vrrp vrid virtual-router-id priority

View Interface view

Parameter virtual-router-id: VRRP standby group number, in the range 1 to 255.

priority-value: Priority value of the router in the specified standby group, in the range 1 to 254, with a higher number indicating a higher priority.

Description Use the vrrp vrid priority command to configure the priority of the router in the specified standby group.

Use the undo vrrp vrid priority command to restore the default.

By default, the priority of a router in a standby group is 100.

■Before executing the command, create a standby group on an interface and configure the virtual IP address of the standby group.

■In VRRP, the role that a router plays in a standby group depends on its priority. A higher priority means that the router is more likely to become the master. Note that priority 0 is reserved for special use and 255 for the IP address owner.

■If the router is the IP address owner, its priority is always 255. Therefore, it will be the master so long as it is functioning normally.

Example # Set the priority of the router in standby group 1 to 150.

<Sysname> system-view

[Sysname] interface ethernet 1/0 [Sysname-Ethernet1/0] vrrp vrid 1 virtual-ip 10.1.1.1

[Sysname-Ethernet1/0] vrrp vrid 1 priority 150