Reference Guide

Disabling Preempt
The preempt command is enabled by default. The command forces the system to change the MASTER
router if another router with a higher priority comes online.
Prevent the BACKUP router with the higher priority from becoming the MASTER router by disabling
preempt.
NOTE: You must configure all virtual routers in the VRRP group the same: you must configure all
with preempt enabled or configure all with preempt disabled.
Because preempt is enabled by default, disable the preempt function with the following command.
• Prevent any BACKUP router with a higher priority from becoming the MASTER router.
INTERFACE-VRID mode
no preempt
Example of Disabling Preempt
Example of Verifying Preempt is Disabled
Re-enable preempt by entering the preempt command. When you enable preempt, it does not display in
the
show commands, because it is a default setting.
Dell(conf-if-gi-1/1)#vrrp-group 111
Dell(conf-if-gi-1/1-vrid-111)#no preempt
Dell(conf-if-gi-1/1-vrid-111)#
Dell(conf-if-gi-1/1-vrid-111)#show conf
!
vrrp-group 111
authentication-type simple 7 387a7f2df5969da4
no preempt
priority 255
virtual-address 10.10.10.1
virtual-address 10.10.10.2
virtual-address 10.10.10.3
virtual-address 10.10.10.10
Dell(conf-if-gi-1/1-vrid-111)#
Changing the Advertisement Interval
By default, the MASTER router transmits a VRRP advertisement to all members of the VRRP group every
one second, indicating it is operational and is the MASTER router.
If the VRRP group misses three consecutive advertisements, the election process begins and the BACKUP
virtual router with the highest priority transitions to MASTER.
NOTE: To avoid throttling VRRP advertisement packets, Dell Networking OS recommends
increasing the VRRP advertisement interval to a value higher than the default value of one second. If
you do change the time interval between VRRP advertisements on one router, change it on all
participating routers.
To change the advertisement interval, use the following command.
• Change the advertisement interval setting.
INTERFACE-VRID mode
advertise-interval seconds
1048
Virtual Router Redundancy Protocol (VRRP)