This looks like a known bug that will be fixed in an upcoming release 5.1(3)N1(1)  which is supposed o be out in December.  Here is the link to the BugTraq Details:http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetai...

Hosts on the P2 side of this diagram cannot ping the HSRP Virtual IP on the P1 side.Hosts on the P1 side can ping the HSRP Virtual IP on the P1 side.

Ok, that is good to know.  I was planning to re-configure, and remove my Back-to-Back vPC and replace it with spanning tree to see if that made any difference.  So, we are seeing the same behavior when connected with vPC or spanning tree beteen the ...

I am also seeing the same problem.The only additional info I have to add is that when I disable HSRP on the P2 switches (by removing the ip from the hsrp group on the P2 switches) then the pings start working.It looks like something is not working wi...