Upgraded from v5.0 to 5.1 yesterday. Had major issues..... A brief overview of what happened;
2x sites (A & B)
3x hosts (2x at A 1x at B) using local storage and onboard SD card with install of esxi5.0
At site B;
Shutdown the VM's.
Put the host in maintenance mode.
Rebooted
Upgraded to v5.1
Then had issues with DNS on my vsphere client as all DNS/AD boxes virtual. Managed to log into the host and had message;
This VM might have been moved or copied blah blah blah...
I answered copied (as it reccomened that)
Powered up VM;s
Noticed under the summary tab on my 2x DC's, exchange, sql and oracle servers that they had now picked up dhcp ips and lost their statics. But 2x other servers were ok.
Ended up that the VM nics had been lost and the system create new NICs. Not sure if the host also upgraded the virtual hardware as some had/didnt have this option...
In any case, entering in the correct statics finally resolved this issue.
However what caused this to happen?
I tried and tested this on a demo environment and all was fine!!
Thanks