Which command is used to configure the VRRP preemption delay?

The command to configure the VRRP preemption delay is structured to specify both the preemption mode and the timer associated with that delay. In the context of VRRP (Virtual Router Redundancy Protocol), preemption allows a higher-priority router to take over as the master router if it becomes available again. The use of "preempt-mode timer delay" indicates that you're configuring not just the preemption, but also how long to delay this action once the router is eligible to become the master.

The inclusion of "timer delay" signifies that this command is specifically defining the duration of the preemption delay, which is essential for controlling how long the router waits before taking over. This is important in scenarios where quick failover is desired yet still allows a window to ensure stability and avoid unnecessary churn in the network.

In contrast, the other commands either do not capture the complete context of configuring preemption delay or misstate the required parameters. They do not align with standard syntax or nomenclature used for VRRP configurations, which may lead to incorrect assumptions regarding their functionality in a networking context.