Thanks for your answer.
Yes, you are right. However, I am asking on the diagram how the actvie HSRP device monitors its down link and up link down, and the standby HSRP takes over when either link goes down? I think even though the standby sup becomes active sup, traffic still goes through the current active HSRP device via the current standby HSRP device as long as there is no switchover between them.
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