We have four hosts in a cluster. Yesterday I moved one NIC from each host on the vmnetwork to a new switch. All was well. On one host, one of the guests fell off the network (could not ping it). I vmotioned it to another host and it started working. Put it back on the original host and it stopped. There are four other guests on the same distributed switch and they had no issues. I also rebooted the guest, no luck.
We are running VMware 5.1 update 2a. The guest is 2008R2.
Any help is greatly appreciated.