How to Set HSRP Priority for Primary Router Reload

A

The preempt command enables the HSRP router with the highest priority to immediately become the active router.

The correct answer is A. standby 10 preempt.

HSRP (Hot Standby Router Protocol) is a Cisco proprietary protocol that provides redundancy for IP networks. HSRP routers work together to present the appearance of a single virtual router to the hosts on a LAN, with one router acting as the active or primary router and the other(s) as standby routers.

The preempt command is used to ensure that a router with a higher priority will become the active router when it is available. In HSRP, the router with the highest priority value will be the active router by default. However, if a higher-priority router becomes available while a lower-priority router is already the active router, the lower-priority router will remain the active router until it fails or until the preempt feature is enabled on the higher-priority router.

Therefore, to ensure that an HSRP router with a higher priority becomes the HSRP primary router after it is reloaded, you need to enter the preempt command. This command enables the router to take over as the active router if its priority is higher than the current active router.

The other options are not correct:

• Option B (standby 10 version 1) is used to specify the HSRP version number. HSRP version 1 is the default and does not need to be configured.

• Option C (standby 10 priority 150) sets the priority value of the router in HSRP. However, if another router with a higher priority becomes available, this router will not become the active router unless preempt is also enabled.

• Option D (standby 10 version 2) is used to configure HSRP version 2, which includes additional features such as authentication and support for IPv6. However, this option does not enable the preempt feature.