Reference Guide
Virtual Router Redundancy Protocol (VRRP) | 889
Change that advertisement interval with the following command in the VRRP mode:
Figure 47-13. Command Example: advertise-interval
Figure 47-14. Command Example Display: advertise-interval in VRID mode
Track an Interface
Set FTOS to monitor the state of any interface according to the Virtual group. Each VRRP group can track
up to 12 interfaces, which may affect the priority of the VRRP group. If the tracked interface goes down,
the VRRP group’s priority is decreased by a default value of 10 (also known as cost). If the tracked
interface’s state goes up, the VRRP group’s priority is increased 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 should not exceed 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.
To track an interface, use the following command in the VRRP mode:
Task Command Syntax Command Mode
Change the advertisement interval
setting.
advertise-interval seconds
Range: 1-255 seconds
Default: 1 second
INTERFACE-VRID
Task Command Syntax Command Mode
Monitor an interface and, optionally, set a value
to be subtracted from the interface’s VRRP
group priority.
track interface [priority-cost cost]]
Cost Range: 1-254
Default: 10
INTERFACE-VRID
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)#
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)#