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timer delay delay-value: Sets preemption delay. The delay-value argument ranges
from 0 to 255 and defaults to 0, in seconds.
Description Use the vrrp ipv6 vrid preempt-mode command to configure preemption on
the router and configure its preemption delay in the specified standby group.
Use the
undo vrrp ipv6 vrid preempt-mode command 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-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 ipv6 vrid priority command to configure the priority of the router
in the specified standby group.