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Router Redundancy Commands
4-323
4
Related Commands
standby authentication (4-324)
standby track (4-326)
standby preempt
This command configures the router to take over as the master virtual router for an
HSRP group if it has higher priority than the current master virtual router. Use the no
form to disable preemption.
Syntax
standby [group] preempt [delay seconds]
no standby [group] preempt [delay]
• group - Identifies the HSRP group. (Range: 0-255)
• seconds - The time to wait before issuing a claim to become the master.
(Range: 0-3600 seconds)
Default Setting
Group number: 0
Preempt: Disabled
Delay: 0 seconds
Command Mode
Interface (VLAN)
Command Usage
• If preempt is enabled, and this router has a priority higher than the current
acting master, it will take over as the new master. If preempt is not enabled,
this router will only take over if it has the highest priority in the group and the
current master stops sending hello messages or sends other messages
indicating that it is no longer acting as the designated router.
• The delay can give additional time to receive an advertisement message from
the current master before taking control. If the router attempting to become the
master has just come on line, this delay also gives it time to gather information
for its routing table before actually preempting the currently active router.
Example
Related Commands
standby priority (4-322)
Console(config-if)#standby 1 preempt delay 10
Console(config-if)#