HSRP Predictable Behaviors

AE

HSRP (Hot Standby Router Protocol) is a Cisco proprietary protocol that allows two or more routers to work together to present the illusion of a single virtual router to the hosts on a LAN.

Two predictable behaviors for HSRP are:

A. The two routers negotiate one router as the active router and the other as the standby router.

When two or more routers are configured with HSRP, they communicate with each other using multicast hello packets to determine the active router. The active router is responsible for forwarding packets sent to the virtual IP address used by the HSRP group, while the standby router is in a standby state ready to take over if the active router fails. The election of the active router is based on a priority value, and the router with the highest priority will become the active router.

B. The two routers share a virtual IP address that is used as the default gateway for devices on the LAN.

When HSRP is configured, the two or more routers share a virtual IP address that is used as the default gateway for devices on the LAN. Hosts on the LAN are configured to use the virtual IP address as their default gateway. When the active router fails, the standby router takes over and begins forwarding packets sent to the virtual IP address, providing a seamless failover for hosts on the LAN. By default, HSRP load-balances traffic between the active and standby routers based on a round-robin algorithm.

Therefore, options A and E are the correct answers.

Option B is incorrect because HSRP does not load-balance default gateway traffic between the active and standby routers.

Option C is incorrect because HSRP does not synchronize configurations between routers.

Option D is incorrect because HSRP uses a virtual IP address that is shared between the routers, and both routers act as the default gateway on the LAN, but traffic is not load-balanced based on different IP addresses.