The error messages do not necessarily indicate an HSRP problem. Rather,the error messages indicate a possible Spanning Tree Protocol (STP) loop or router/switch configuration issue. The error messages are just symptoms of another problem.
Kindly send the error messages logged for an accurate analysis
Anyway, the thing is that you cannot have the same public address configured on both routers for the same sources. Even if HSRP is supposed to get traffic to one router only at time, packet can be emitted sent from ISA to the other router too, arp propagate and the conflict is detected. It may work fine and you can live with the error log, but I would recommend that you check you nic teaming to work in bridge mode to the router / switchs, so that one link is kept down all the time.
That should make packets go to one router only - the hsrp active.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...