The Standby router is the router that takes over the routing responsibilities when the Active router fails. The Active router is the router that is preferred to route the network packets. In this post, we will learn how to configure HSRP on Cisco routers. It uses the concept of Active and Standby (Master/Backup) routers for redundancy. HSRP uses a virtual MAC address and an IP address that is shared by a group of configured routers. It enables a set of router interfaces to work together and present them as a single virtual router (default gateway) to the clients on a network. It is a Cisco proprietary protocol that provides high availability and redundancy. HSRP stands for Hot Standby Routing Protocol.
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