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Command Usage
• VRRP advertisements from the current master virtual router include
information about its priority and current state as the master.
• VRRP advertisements are sent to the multicast address 224.0.0.8. Using
a multicast address reduces the amount of traffic that has to processed
by network devices that are not part of the designated VRRP group.
• If the master router stops sending advertisements, backup routers will
bid to become the master router based on priority. The dead interval
before attempting to take over as the master is three times the hello
interval plus half a second
Example
vrrp preempt
This command configures the router to take over as the master virtual router
for a VRRP group if it has a higher priority than the current acting master
router. Use the no form to disable preemption.
Syntax
vrrp group preempt [delay seconds]
no vrrp group preempt
• group - Identifies the VRRP group. (Range: 1-255)
• seconds - The time to wait before issuing a claim to become the master.
(Range: 0-120 seconds)
Default Setting
•Preempt: Enabled
• Delay: 0 seconds
Command Mode
Interface (VLAN)
Command Usage
• If preempt is enabled, and this backup router has a priority higher than
the current acting master, it will take over as the new master. However,
Console(config-if)#vrrp 1 timers advertise 5
Console(config-if)#