MikeOD,
Have you had this issue at all since the firmware update? I am currently on a call with HP trying to troubleshoot this same exact issue. VMware tech pointed at the edge switch, networking team points to chassis. I am at a loss and have been working this for a couple weeks now. I just wonder if you have seen this come back up since the updates. We are currently running OA 3.70, VC 3.51, and ESXi 5.1.
thanks for your time.