When I came in this morning I logged on our VC console to find some info for a friend, and discovered that one of our ESX hosts was in disconnected mode. I tried reconnecting but that did not work, so I had to dig deeper. I logged on my disconnected host through SSH and ran the following commands.
service mgmt-vmware restart
service vmware-vpxa restart
That took care of it, it seemed the management services on my host had gone into vacation mode, and I could now reconnect the host in my virtual center.
However I discovered a few minutes after when I had reconfigured HA that I could still not migrate one of my VMs while online. I verified my connectivity by using "vmkping" and did not find anything wrong with my IPs or my hostnames, but when I checked the servers time, they were roughly 12 minutes out of sync.
It seems my previous NTP setup did not work as it should, so I ran through the process of the previous article posted here, synced my servers back up and voila, the VM could migrate as it should.
So keeping your systems in sync is not just a directory service necessity, but also very important for any systems talking together.
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