Final answer:
HSRP interface tracking is a feature in networking that allows routers to track the availability of interfaces. It helps achieve redundancy and failover in a network with multiple routers.
Step-by-step explanation:
HSRP Interface Tracking
HSRP (Hot Standby Router Protocol) interface tracking is a feature in networking that allows routers to track the availability of interfaces. It is used in scenarios where redundancy and failover are important, such as in a network with multiple routers.
When HSRP interface tracking is enabled, routers monitor the status of certain interfaces. If an interface goes down, the router decreases its HSRP priority, which can result in another router taking over as the active router for the HSRP group.
For example, let's say we have two routers, Router A and Router B, configured with HSRP. Both routers have interfaces connected to the same network. By enabling HSRP interface tracking, the routers can monitor the status of their interfaces. If the interface on Router A goes down, Router A will decrease its priority, allowing Router B to become the active router for the HSRP group.