I understand the whole HSRP process and use it daily but I have recently came across an unusual setup. However, can you let us know a little bit more about what you want to achieve, and why you want only the active router to participate in OSPF and not the standby router? Maybe we can suggest another solution for your requirements. In general, if you want to achieve such redundancy, you should use the load balancing and rerouting capabilities of the routing protocol itself rather than relying on HSRP. This presents a problem when attempting to achieve redundancy. Only the “real” addresses can participate. This is because typically, the virtual IP created via HSRP cannot participate in OSPF (or any routing protocol for that matter). Now based on your description, you are trying to use HSRP to provide gateway redundancy to OSPF routers, correct? Now, this can be done, however, it is not the most elegant solution.

Remember that HSRP is primarily used as a method for achieving gateway redundancy for end devices such as PCs, IP phones, IP cameras, printers etc… This means that the redundancy group that is created on a pair of Layer 3 devices using HSRP should be facing a subnet with such end-user devices.

Asa active standby gns3