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VMWare VMotion: do doing a VMotion on a virtualised Windows server changes it's MAC address?

Hi,
My guess is that is does not change the MAC address but just to be safe:
Can someone confirm me that doing a VMotion on a virutalisated Windows server do not change it's MAC address?

One of my server is a FlexLM server and as you know, FlexLM licensing requires/incorporate the MAC address of the server. So, on a physical server, every time I would want to install FlexLM to another server I would need to re-register it with them. And if the network card fails on a physical server, I would also need to re-register.
But with visualization, if I need to do a maintenance on the blade that holds my visualized windows server, I do a vmotion and move all vm running on that blade to other blades and that must not impact FlexLM.
tx!
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SigSupport
Asked:
SigSupport
2 Solutions
 
GeodashCommented:
No, the MAC should not change. It will change if you clone it

The MAC address is written in the vmx file (also with the VM UUID).

So vMotion or a host migration does not move this file and for this reason does not change it.

A datastore migration will move the file, but also will keep as-as (it's a move operation).

 

But a clone operation is a copy plus a modification of the vmx file (to have different MAC address and unique UUID).

For this reason if you make a manually copy and then add the vmx to the inventory and power-on the VM you will prompt for a message asking if you have copy or moved the VM.

Sorry, that was taken from here -

http://communities.vmware.com/thread/303497


You can force it to keep the current MAC by looking here as well -

http://www.vmware.com/support/ws55/doc/ws_net_advanced_mac_address.html
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
vMotion DOES NOT CHANGE THE MAC ADDRESS!

The configuration of the VM does not change, only the Host running the VM changes.
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SigSupportAuthor Commented:
Thanks guys.
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