189Use undo vrrp ipv6 vrid preempt-mode to disable preemption on the router in a specific VRRP group. Asa result, the router is operating in non-preemptive mode.Use undo vrrp ipv6 vrid preempt-mode timer delay to restore the default preemption delay.By default, the router is operating in preemptive mode and the preemption delay is 0 seconds.If you set the router in the VRRP group to operate in non-preemptive mode, the delay period automaticallychanges to 0 seconds.To avoid frequent member state changes in a VRRP group and make the backups have enough time tocollect information (such as routing information), each backup waits for a period of time (the preemptiondelay time) after it receives an advertisement with the priority lower than the local priority, then sendsVRRP advertisements to start a new master election in the VRRP group and becomes the master.Before executing the command, create a VRRP group on an interface and configure the virtual IPv6address of the VRRP group.Related commands: display vrrp ipv6.Examples# Enable preemption on the switch in VRRP group 80 and set the preemption delay to 5 seconds. system-view[Sysname] interface vlan-interface 2[Sysname-Vlan-interface2] vrrp ipv6 vrid 10 virtual-ip fe80::2 link-local[Sysname-Vlan-interface2] vrrp ipv6 vrid 10 preempt-mode timer delay 5vrrp ipv6 vrid prioritySyntaxvrrp ipv6 vrid virtual-router-id priority priority-valueundo vrrp ipv6 vrid virtual-router-id priorityViewInterface viewDefault level2: System levelParametersvirtual-router-id: Specifies the VRRP group number in the range of 1 to 255.priority-value: Specifies the priority value of the router in the specified VRRP group, in the range of 1 to254. A higher number indicates a higher priority.DescriptionUse vrrp ipv6 vrid priority to configure the priority of the router in the specified VRRP group.Use undo vrrp ipv6 vrid priority to restore the default.By default, the priority of a router in a VRRP group is 100.Before executing the command, create a VRRP group on an interface and configure the virtual IPv6address of the VRRP group.
