Reference Guide
virtual-address 10.10.10.1
virtual-address 10.10.10.2
virtual-address 10.10.10.3
virtual-address 10.10.10.10
FTOS(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 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
The range is from 1 to 255 seconds.
The default is 1 second.
Example of the advertise-interval Command
FTOS(conf-if-gi-1/1)#vrrp-group 111
FTOS(conf-if-gi-1/1-vrid-111)#advertise-interval 10
FTOS(conf-if-gi-1/1-vrid-111)#
Example of Verifying the Configured Advertisement Interval
FTOS(conf-if-gi-1/1-vrid-111)#show conf
!
vrrp-group 111
advertise-interval 10
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
FTOS(conf-if-gi-1/1-vrid-111)#
Track an Interface or Object
You can set FTOS to monitor the state of any interface according to the virtual group.
Each VRRP group can track up to 12 interfaces and up to 20 additional objects, which may affect the priority of the VRRP
group. If the tracked interface goes down, the VRRP group’s priority decreases by a default value of 10 (also known as
cost
). If the tracked interface’s state goes up, the VRRP group’s priority increases by 10.
The lowered priority of the VRRP group may trigger an election. As the Master/Backup VRRP routers are selected based
on the VRRP group’s priority, tracking features ensure that the best VRRP router is the Master for that group. The sum of
all the costs of all the tracked interfaces must be less than the configured priority on the VRRP group. If the VRRP group
is configured as Owner router (priority 255), tracking for that group is disabled, irrespective of the state of the tracked
interfaces. The priority of the owner group always remains at 255.
For a virtual group, you can track the line-protocol state or the routing status of any of the following interfaces with the
interface interface parameter:
884