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Moving a VM system containing 1 vCenter server and 2 ESXi servers to new IP segment without downtime possible?

Posted on 2014-09-10
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Last Modified: 2014-09-29
Dear Experts

I need to move a VM System containing of 1 vCenter server and 2 ESXi hosts to a different IP segment.
Is there any way to achieve this without any downtime (a HA cluster is configured - vMotion).

According to this post (http://www.experts-exchange.com/Software/VMWare/Q_28371304.html) this should be my checklist more or less, but it requires downtime:

Change IPs on Physical/VMs
Disable HA on cluster
Remove ESXi hosts from vCenter
Change IP of vCenter
Change IPs on ESXi hosts
Add hosts to vCenter

Does anyone know of a way to do it without any downtime?
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Question by:chinguetti
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Accepted Solution

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Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40314095
Changing IP Addresses of ESXi hosts and vCenter Server, will not cause any VM downtime!

The VMs will continue running, on the current physical network, and IP network.

However, if you change the IP Address of a COMPUTER, there will be quick outage!
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Author Comment

by:chinguetti
ID: 40316129
Hello Andrew

Thank you for your reply.

Is the checklist above correct?
This is the first time doing a change like this so I just want to make sure I get it right.
If you have any more points to add to it or any additional points to add under each point (links etc) it would be very helpful.
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LVL 119
ID: 40316362
Yes, the order is correct.

It's a fairly simple procedure.
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Author Comment

by:chinguetti
ID: 40348304
Dear Andrew

In order to remove the hosts from vCenter, you need to put them into maintenance mode and subsequently power them off.
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LVL 119
ID: 40348441
Not normally. vCenter Server is just a management platform.
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