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Arkady
Contributor
Contributor
‎03-18-2014 04:10 PM

MAC address question

Hello,

We have ESXi 5.0 U1 cluster. I was always under impression that VM retain same MAC address all the time. 

After vmotion, reboot MAC will not be changed.

Is it correct?

Thank you in advance

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2 Replies
Linjo
Leadership
Leadership
‎03-18-2014 05:13 PM

It should not change unless someone are changed it deliberately.

// Linjo

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weinstein5
Immortal
Immortal
‎03-18-2014 05:45 PM

I am not sure about ESXi 5 but in previous versions a VM's MAC address is generated every time the VM is powered on and is based on the UUID of the ESXi host and the locations where the VM's configuration file is stored. I believe this is still the case that is why software that is licensed via MAC address requires hard coded MAC addresses.

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