I'm in the process of applying the latest updates to my ESXi 5.1 servers via VUM and I'm noticing that after the host reboots I have to manually reconnect the host to virtual center. After this happens, the ESXi host usually disconnects the second time which results in a second manual reconnect.
After the second manual reconnect everything appears as normal.
All the ESXi hosts and the vCenter/VUM are on the subnet so there shouldn't be any firewalls in play here.
Has anyone seen anything like this?