Cisco Catalyst SD-WAN Routing Configuration Guide, Releases 26.x and Later

PDF

Hot Standby Router Protocol

Explains how to configure and manage the Hot Standby Router Protocol (HSRP) to provide first-hop IP device failover and high network availability by using virtual IP and MAC addresses for gateway redundancy. Learn to enable HSRP on interfaces, set priorities, configure authentication, adjust timers, and optimize performance to ensure seamless failover and reliable network operation in Cisco Catalyst SD-WAN environments.