Today I setup three new ESXi 5.0 hosts with the HP Branded ESXi media, all went well until I joined the hosts to vCenter. After joining and registering with the vCenter server then became disconnected. I tried to manually connect them back in and they looked like they came back… but would almost instantly disconnect again.
After some direction from @Ollfried on Twitter I did a quick Google search and found this thread http://communities.vmware.com/message/1823624
If you scroll down a bit you see where they are telling you to remove an HP VIB file that has to do with the licensing. I can confirm that this does fix the problem and after rebooting the hosts I was able to add them back to vcenter and all is well.
To fix the problem:
- Connect to each host with vSphere client and enable SSH
- SSH to the host and run the following command
esxcli software vib remove -n hp-esx-license --no-live-install
- Reboot the host
What it looks like: