HSRP

Host Standby Router Protocol (Cisco Only)

It is a protocol to provide a "redundant router" for hosts, which is unable to discover router in dynamics.

Lifecycle and Status

the phase is not in sequence.

                  Initial
                     |
                     V
                   Learn
                     |
                     V
                   Listen
                     |
                     V
                   Speak
                     |
                     V
                  Standby
                     |
                     V
                   Active

(to be continued....)