Which value is used to determine the active router in an HSRP default configuration?
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In an HSRP (Hot Standby Router Protocol) default configuration, the value used to determine the active router is the Router Priority.
HSRP is a Cisco proprietary protocol that provides redundancy for IP networks by allowing two or more routers to share a virtual IP address. This virtual IP address is used as the default gateway for hosts on the network. HSRP routers communicate with each other using multicast messages to determine which router should be the active (or primary) router and which router should be the standby (or backup) router.
The router with the highest priority is elected as the active router. The default priority for HSRP is 100. However, this value can be changed to make a router more or less likely to become the active router. The router with the second-highest priority becomes the standby router. If the active router fails, the standby router takes over as the active router and starts forwarding packets.
Other factors that can be used to determine the active router in HSRP include router tracking and interface tracking. Router tracking is used to track the availability of a particular interface or a particular route, while interface tracking is used to track the status of a particular interface. However, in the default configuration of HSRP, the router priority is used to determine the active router.