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vCenter Server IP address change causes ESX hosts to disconnect (1001493)
I changed the IP of my vCenter Server and now all ESX hosts are showing as disconnected from VMware Infrastructure/vSphere Client. How can I resolve this?
Note: Before you begin, see Restarting the Management agents on an ESX Server (1003490) for important information on restarting the mgmt-vmware service.
The ESX hosts disconnect because they store the IP address of the vCenter Server in configuration files on each of the individual servers. This incorrect address continues to be used for heartbeat packets to vCenter Server.
There are two methods to get the ESX hosts connected again. Try each one in order, testing your results each time.
Log in as root to the ESX host with an SSH client.
Using a text editor, edit the /etc/opt/vmware/vpxa/vpxa.cfg file and change the <serverIp> parameter to the new IP of the vCenter Server.
ESXi 5.0: The vpxa.cfg file can be located in /etc/vmware/vpxa/vpxa.cfg
Save your changes and exit.
Restart the management agents on the ESX. For more information, see Restarting the Management agents on an ESX Server (1003490).
Restart the VirtualCenter Server service. For instructions, see Stopping, starting, or restarting the vCenter Server service (1003895).
Note: This procedure can be performed on an ESXi host through Tech Support mode with the help of a VMware Technical Support Engineer. For more information, see Tech Support Mode for Emergency Support (1003677).
From vSphere Client, right-click the ESX host and click Disconnect.
From vSphere Client, right-click the ESX host and click Reconnect. If the IP is still not correct, go to step 3.
From vSphere Client, right-click the ESX host and click Remove.
Caution: After removing the host from vCenter Server, all the performance data for the virtual machines and the performance data for the host will be lost.
Reinstall the VMware vCenter Server agent. For instructions, see Verifying and reinstalling the correct version of VMware VirtualCenter Server agent (1003714).
Select New > Add Host.
Enter the information used for connecting to the host.
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