The Active Router Role in HSRP Failover
Question
When the active router in an HSRP group fails, what router assumes the role and forwards packets?
Answers
Explanations
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A. B. C. D.C.
HSRP (Hot Standby Router Protocol) is a Cisco proprietary protocol that enables multiple routers to participate in a virtual router group to provide redundancy and high availability. In an HSRP group, one router is elected as the active router, while the others are in standby mode.
When the active router fails or becomes unavailable, one of the standby routers assumes the active role and takes over forwarding packets for the virtual IP address of the HSRP group. The process of selecting the new active router is known as a failover.
In an HSRP group, the router with the highest priority is elected as the active router. If two or more routers have the same priority, the router with the highest IP address becomes the active router. The remaining routers become standby routers, ready to take over the active role if the active router fails or becomes unavailable.
To answer the question, when the active router in an HSRP group fails, the standby router with the highest priority or highest IP address, depending on the configuration, assumes the active role and forwards packets. Therefore, the correct answer is C. standby.
It's worth noting that the backup router is a term used in VRRP (Virtual Router Redundancy Protocol), which is another protocol used for router redundancy and high availability. In VRRP, the router in the backup state is ready to take over the active role if the active router fails, similar to the standby router in HSRP.
