Configure Preemption And Delay For A Switch Within A Virtual Router - Huawei Quidway S3500 Series Operation Manual

Operation Manual - Reliability
Quidway S3500 Series Ethernet Switches
Table 1-4 Configure the priority of switches in the virtual router.
Configure the priority of switches in the
virtual router.
Clear the priority of switches in the virtual
router.
By default, the priority is 100.
Note:
The priority for IP address owner is always 255, which cannot be configured otherwise.

1.2.5 Configure Preemption and Delay for a Switch within a Virtual Router

Once a switch in the virtual router becomes the Master switch, so long as it still
functions properly, other switches, even configured with a higher priority later, cannot
become the Master switch unless they are configured to work in preemption mode. The
switch in preemption mode will become the Master switch, when it finds its own priority
is higher than that of the current Master switch. Accordingly, the former Master switch
will become the BACKUP switch. Together with preemption settings, a delay can also
be set. In this way, a Backup will wait for a period of time before becoming a Master. In
an unstable network if the BACKUP switch has not received the packets from the
Master switch punctually, it will become the Master switch. However, the failure of
BACKUP to receive the packets may be due to network congestion, instead of the
malfunction of the Master switch. In this case, the Backup will receive the packet after a
while. The delay settings can thereby avoid the frequent status changing.
Perform the following configuration in VLAN interface view.
Table 1-5 Configure preemption and delay for a switch within a virtual router
Enable the preemption mode and
configure a period of delay.
Disable the preemption mode.
The delay ranges from 0 to 255, measured in seconds. By default, the preemption
mode is preemption with a delay of 0 second..
Operation
Operation
Huawei Technologies Proprietary
1-5
Chapter 1 VRRP Configuration
Command
vrrp vrid virtual-router-ID priority
priority
undo vrrp
priority
Command
vrrp vrid virtual-router-ID preempt-mode
[ timer delay delay-value ]
undo vrrp vrid
preempt-mode
vrid virtual-router-ID
virtual-router-ID