3com S7906E 参考指南

 

1-21 

Use the vrrp ipv6 vrid preempt-mode command to configure preemption on the switch and configure 

its preemption delay in the specified VRRP group. 

Use the undo vrrp ipv6 vrid preempt-mode command to disable preemption on the switch in the 

specified VRRP group. 

Use the undo vrrp ipv6 vrid preempt-mode timer delay command to restore the default preemption 

delay, that is, zero seconds. 

The default mode is immediate preemption without delay. 

If you set the switch in the VRRP group to work in non-preemptive mode, the delay period changes to 

zero seconds automatically. 

To avoid members in a VRRP group from changing their states frequently and make backups have 

enough time to collect information (such as routing information), each backup waits for a period of time 

(the preemption delay time) after it receives an advertisement with the priority lower than the local 

priority, then sends VRRP advertisements to start a new master election in the VRRP group and finally 

becomes the master. 

Note that before executing the command, you need to create a VRRP group on an interface and 

configure the virtual IPv6 address of the VRRP group. 

# Enable preemption on the switch in VRRP group 80 and set the preemption delay to five seconds. 

<Sysname> system-view 

[Sysname] interface vlan-interface 2 

[Sysname-Vlan-interface2] vrrp ipv6 vrid 80 virtual-ip fe80::2 link-local 

[Sysname-Vlan-interface2] vrrp ipv6 vrid 80 preempt-mode timer delay 5 

vrrp ipv6 vrid virtual-router-id priority priority-value 

undo vrrp ipv6 vrid virtual-router-id priority 

Interface view 

2: System level 

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

priority-value: Priority value of the switch in the specified VRRP group, in the range 1 to 254. A higher 

number indicates a higher priority.  

Use the vrrp ipv6 vrid priority command to configure the priority of the switch in the specified VRRP 

group.