Determining the MAC address generated by VMX

How the MAC addresses are generated when a new virtual machine is created/cloned using ESX and especially LabManager?

Is the set of predictable, algorithmic MACs potential, or is it completely random?

The use case, is that I need to know all of the potentially valid MACs which can be assigned to any given virtual computer.   It is calculated from the CMA of the physical host?  Is it still a finite set?

Any idea is appreciated.  Thank you

Generated by the Lab Manager MAC address will be in the following format:

00:50:56:XX:NN:NN

Where XX is the installation ID of your Lab Manager you will find on the General Settings page. Remember that you must convert to the spell. Example, if your installation ID is 41, so all your MAC address will look like 00:50:56:29:NN:NN.

NN:nn is the unique number assigned to the network adapter. each virtual computer

So let's say that I log in the laboratory Manager (whose installation ID is 41) and create a virtual machine with two network cards. It can assign these MAC addresses to my two network adapters:

00:50:56:29:00:60

00:50:56:29:00:61

Now say I have add a new network adapter. The MAC address assigned to the third NIC will be 00:50:56:29:00:62.

Now let's say I delete the first NETWORK card MAC address is 00:50:56:29:00:60. Then I go and add a new network adapter. MAC address will be 00:50:56:29:00:63. The MAC address that was previously removed won't get recycled, at least not immediately.

In order to predict the MAC address is doable as long as you are aware of all MAC addresses in use on your system.

Tags: VMware

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