So studying hard to renew CCNA Wednesday. Came across something i hadn't seen before regarding HSRP. It seems if you simply enable HSRP and don't set a priority, the HSRP pair will compare IP addresses and the higher interface IP wins. That router will become the active device for the virtual IP/MAC.
Can anyone tell me what would happen if preempt was enabled on a router in this scenario where it had the lower IP address? Does that in any way change the behavior?
Asking because I ran into a study question that was worded like this, "Which configuration do you apply to an HSRP router so that it is most likely to come up if the active router goes down?"
General consensus seems to point to the answer as enabling preempt, although I don't really understand why.