3Com MSR 50, MSR 30 Vrrp ipv6 vrid priority, Undo vrrp ipv6 vrid virtual-router-idpriority, 2243

2243

timer delay delay-value: Sets preemption delay. The delay-valueargument ranges from 0 to 255 and defaults to 0, in seconds.

Description Use the vrrp ipv6 vrid preempt-modecommand to configure preemption on the router and configure its preemption delay in the specified standby group.

Use the undo vrrp ipv6 vrid preempt-modecommand to disable preemption on the router in the specified standby 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 router in the standby group to work in non-preemption mode, the delay period changes to zero seconds automatically.

On an instable network, the standby group member in the backup state may not normally receive the packets from the master member due to network congestion, 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 IPv6 address of the standby group.

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

<Sysname> system-view

[Sysname] interface ethernet 1/0

[Sysname-Ethernet1/0] vrrp ipv6 vrid 80 virtual-ip fe80::2 link-local

[Sysname-Ethernet1/0] vrrp ipv6 vrid 80 preempt-mode timer delay 5

vrrp ipv6 vrid priority

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

undo vrrp ipv6 vrid virtual-router-idpriority

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 ipv6 vrid priority command to configure the priority of the router in the specified standby group.