HSRP Concepts
Lesson 1: HSRP
HSRP Operation
HSRP operates with an active/standby model (also more generally called active/passive). HSRP allows two (or more) routers to cooperate, all being willing to act as the default router. However, at any one time, only one router actively supports the end-user traffic. The packets sent by hosts to their default router flow to that one active router. Then, the other routers, with an HSRP standby state, sit there patiently waiting to take over should the active HSRP router have a problem.
The HSRP active router ...
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