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IMPORTANT:
•
You can configure different authentication modes and authentication keys for the VRRP groups
on an interface. However, members of the same VRRP group must use the same authentication
mode and authentication key.
•
For VRRPv3, this command does not take effect.
Examples
# Set the authentication mode to
simple
and the authentication key to
Sysname
for VRRP group 1
on VLAN-interface 2.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] vrrp vrid 1 authentication-mode simple plain Sysname
Related commands
•
display
vrrp
•
vrrp
version
vrrp vrid preempt-mode
Use
vrrp
vrid preempt-mode
to enable the preemptive mode for the device in an IPv4 VRRP group
and configure the preemption delay.
Use
undo vrrp
vrid preempt-mode
to disable the preemptive mode for the device in an IPv4 VRRP
group.
Use
undo vrrp vrid preempt-mode delay
to restore the default preemption delay.
Syntax
vrrp vrid
virtual-router-id
preempt-mode
[
delay
delay-value
]
undo
vrrp vrid
virtual-router-id
preempt-mode
[
delay
]
Default
The device operates in preemptive mode and the preemption delay is 0 seconds.
Views
Interface view
Predefined user roles
network-admin
mdc-admin
Parameters
virtual-router-id
: Specifies an IPv4 VRRP group by its virtual router ID in the range of 1 to 255.
delay
delay-value
: Specifies a preemption delay time in the range of 0 to 255 in seconds. The default
setting is 0 seconds.
Usage guidelines
In non-preemptive mode, when a device in the IPv4 VRRP group becomes the master, it acts as the
master as long as it operates correctly, even if a backup is assigned a higher priority later. The
non-preemptive mode helps avoid frequent switchover between the master and backups.
In preemptive mode, a backup takes over as the master and sends VRRP advertisements when it
detects that it has a higher priority than the master. The previous master then becomes a backup.
This mechanism makes sure the master is always the device with the highest priority.
