What occurs at startup

When the owner router comes online, it waits for the configured amount of time before taking control of the VIP. This period of time is calculated as follows:

If the value of the master down time (3 * advertisement interval) is less than or equal to the preempt delay time, the owner router will wait until the master down time (3 * advertisement interval) has expired.

During this waiting period, if the owner router receives a VRRP packet for its VIP from the backup router, it waits until the PDT expires before taking control of its VIP. If the owner router does not receive any VRRP packets and the master down time expires, the owner router can take control of its VIP immediately.

If the value of the master down time (3 * advertisement interval) is greater than the preempt delay time, the owner router will wait until the PDT expires before taking control of its VIP.