Reference Guide

● Prevent any BACKUP router with a higher priority from becoming the MASTER router.
INTERFACE-VRID mode
no preempt
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.
To disable preempt, use the no preempt command.
Dell(conf-if-te-1/1)#vrrp-group 111
Dell(conf-if-te-1/1-vrid-111)#no preempt
Dell(conf-if-te-1/1-vrid-111)#
To verify the preempt status, use the show config command.
Dell(conf-if-te-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-te-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 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.
If are using VRRP version 2, you must configure the timer values in multiple of whole seconds. For example a timer value of 3
seconds or 300 centisecs are valid and equivalent. However, a time value of 50 centisecs is invalid because it not a multiple of 1
second. If you are using VRRP version 3, you must configure the timer values in multiples of 25 centisecs.
If you are configured for VRRP version 2, the timer values must be in multiples of whole seconds. For example, timer value of 3
seconds or 300 centisecs are valid and equivalent. However, a timer value of 50 centisecs is invalid because it not is not
multiple of 1 second.
If are using VRRP version 3, you must configure the timer values in multiples of 25 centisecs.
To change the advertisement interval in seconds or centisecs, use the following command. A centisecs is 1/100 of a second.
● Change the advertisement seconds interval setting.
INTERFACE-VRID mode
advertise-interval seconds
The range is from 1 to 255 seconds.
The default is 1 second.
● For VRRPv3, change the advertisement centisecs interval setting.
INTERFACE-VRID mode
advertise-interval centisecs centisecs
The range is from 25 to 4075 centisecs in units of 25 centisecs.
The default is 100 centisecs.
Virtual Router Redundancy Protocol (VRRP)
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