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Can’t connect my VMhost

ahmad1467
ahmad1467 asked
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Can’t connect my VMhost
I am running  VMware ESX 4.0, in my cluster I have two VMHost Host, I took one of my host down but when I brought the host  back up I could connect it back to the cluster. It showing the host with a red X,
I’m not sure how to reconnect, I tried right clicking on the host and selected connect then I get an error:
[This host is currently being managed by the Vcenter with IP address changes made to this host during this session may not be reflected in vSphere Clieent sessions viewing vCenter]. I click on OK then I get at  a box for me to specify connection I tried using the username and password that I normally use to log into the Client but no luck. My other Host is connected but no luck getting the second one not sure what to do.

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Commented:
Can you check the console of the host?  I've seen instances where hosts (ESX 4.0) reboot and enter "isolation mode" for about 10 minutes after a maintenance reboot whether in Maintenance Mode or not.  

If you can get into the console of the "unresponsive host", are you able to ping the VCenter server?

Secondarily, is the IP Address of the VCenter mentioned in the error you see the same as the VCenter server you are using to try to reconnect?

Author

Commented:
I can’t get to the console right now, The Vcenter IP address in the error  is different from the server but from a workstation I was able to ping the IP that was shown on the console screen

Commented:
You can probably try using putty.exe (http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html) to SSH into the ESX server.  

Secondarily, can you http:// to the IP Address of the ESX Server and download the VSphere client (not the vcenter server)?  See if you can manage the Host from that client download?  Maybe you need to run some updates to ESX?  You can probably download the Host Update Utility from http:// from the server (if it's responding).

Author

Commented:
I can http into the server to down load the Client but I’m already running it, from the client view it’s showing the server but I can’t connect I have attached  picture of what I’m looking at
VSphere-client-.doc

Commented:
what is the 192.168.240.5 computer?  Can you close the VCenter / VSphere Client from that machine? or is 192.168.240.5 the VCenter server where this image came from?  What happens when you enter the root username and password in the connection dialog from the second image? Does it (try to) connect?

Author

Commented:
The 192.168.240.5 computer is  the Vcenter server that is running on the other host I’m thinking the root password the same as what I use on the vSphere Client.When I tried to login I go an error message that I have attached.  When I rebooted 192.168.240.5 computer I got kicked out of the vSphere client session
VSphere-client2-.doc

Author

Commented:
When I try to connect I then get a message saying can't complete login do to an incorrect username password

Login to the ESX Host directly and uninstall the VirtualCenter Agent.

Try adding the Host back using the Add Host Wizard in vCenter. I hope this would resolve the issue.
May I know whether you have DNS in place ?