O'Reilly logo

Implementing Cisco Networking Solutions by Harpreet Singh

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

HSRP

Hot Standby Router Protocol (HSRP) provides high-availability by providing first-hop routing redundancy for IP hosts on networks configured with a default gateway IP address. HSRP is used in a group of routers for selecting an active device and a standby device. Hosts send the packets to the default gateway to the active router and when the active router fails, the standby router takes over transparently.

Most IP hosts have a single IP address configured as the default gateway. This default gateway is a Virtual IP (VIP) address that is assumed by the active HSRP device on the network. To maintain transparency of the failover mechanism, the HSRP devices also use a virtual MAC address corresponding to this VIP so that the ARP entries on ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required