Let me explain the scenario which i have in my network. There is firewall outside interface and two routers LAN are connected to unmanagable Switch and there is a network X.X.X.X configure between these three devices.I have configured HSRP on both Routers. HSRP priority,timers,track and virtual IPs are configured.When i remove the WAN cable from pri router traffic automatically shifted to sec and reinsert the cable result previous router is pri. My querry is some time due to flaffing in internet link the traffic supposed to shit into sec but traffic is not shifting automatically rather than when i login into pri and fires sh standby command it shows status active but traffic will not flow. at this time to make it active i must have to remove WAN cable need to reinsert or changing priority to make sec active vice-versa.
Kindly help on this its very urgent.