When you create a VM on VMware ESXi, each network interface of the VM is assigned a dynamically generated MAC address. If you want to change this default behavior and assign a static MAC address to your VM, here is how to do it.
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As you can see above, VMware's vSphere GUI client already has a menu for setting a static MAC address for a VM. However, this GUI-based method only allows you to choose a static MAC address from 00:50:56:xx:xx:xx, which is VMware-reserved MAC address range. If you attempt to set any arbitrary MAC address outside this MAC range, you will fail to launch the VM, and get the following error.
Aug 12, 2013 Once a VM is powered on for the first time, a new MAC address is generated for each virtual network adapter, and this MAC address will persist for the VM. Unless yo manually change it, or you manually move/copy the VM to another location and answer the question about whether you moved or copied the VM with 'I copied it'. Assign a Static MAC Address with the vSphere Web Client. You can assign static MAC addresses to a powered-down virtual machine's virtual NICs. In the MAC Address section, select Manual from the drop-down menu. Type the static MAC address and click OK. Aug 14, 2014 How to set a static MAC address on VMware ESXi virtual machine. Posted on August 14, 2014 by Dan Nanni 4 Comments. MAC statically. I couldn't use a different mac address, as I was forced by a license on the vm to use this specific one. You really saved me a lot of time and nerves 🙂.
Then what if I want to assign any arbitrary MAC address to a VM?
Fortunately, there is a workaround to this limitation. The solution is, instead of using vSphere GUI client, editing .vmx file of your VM directly, after logging in to the ESXi host.
First, turn off the VM to which you want to assign a static MAC address.
Enable SSH access to your ESXi host if you haven't done it already. Then log in to the ESXi host via SSH.
Move to the directory where your VM's .vmx file is located:
Open .vmx file with a text editor, and add the following fields. Replace the MAC address field with your own. Mccoy mac-1700 vtx nav/comm installation manual.
Now you should be able to launch a VM with the static MAC address you defined in .vmx file.
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ESXI 5.5 static mac address “conflicts with VMware reserved MACs”
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You may see above error in ESXI 5.5 after changing dynamically generated MAC address to STATIC mac address dueto application MAC bind restriction.
In new ESXI 5.5 , new policies have been added where the statically assigned MAC addresses can only be in the range 00:50:56:xx:xx:xx series, If you try to change it to something else and then power on the guest machine, you may see above error.
Few days before, a friend of mine upgraded his ESXI from ver 5.0 to 5.5. One of his guest application was binded with the MAC address and the new esxi 5.5 doesn’t allow to use that specific series mac address. So I googled and found following solution that worked (at least for me 😉 )
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To RESOLVE this issue, follow this.
1- Enable SSH in ESXI Server Configuration
2- Turn off the target guest machine and change the mac address as per your requirements for the required interface.
3- Turn off the V-Sphere ESXI client.
3- Login to ESXI server via SSH using any ssh client like PUTTY
4- Goto your datastore / guestmachine folder and open the VMX file.
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For example I have guest machine with ‘123‘ name. So I used following
~ # cd /vmfs/volumes/
/vmfs/volumes # ls
52a18cdd-49376389-86aa-000c29d1de32 61031d71-0233e8da-be74-f942274c16c3
52a18ce5-9d0863e6-e50b-000c29d1de32 8901537a-ad66db83-fd1f-38ac926cce01
52a18ce7-bd9d6e2a-dacf-000c29d1de32 datastore1
/vmfs/volumes #
Day one manual machine. /vmfs/volumes # cd datastore1/
/vmfs/volumes/52a18ce5-9d0863e6-e50b-000c29d1de32 # ls
123
/vmfs/volumes/52a18ce5-9d0863e6-e50b-000c29d1de32 # cd 123
/vmfs/volumes/52a18ce5-9d0863e6-e50b-000c29d1de32/123 # ls
123-flat.vmdk vmware-14.log
123.nvram 123.vmxf vmware-15.log
123.vmdk vmware-11.log vmware-16.log
123.vmsd vmware-12.log vmware.log
123.vmx vmware-13.log
As showed in the image below . . .
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Now open the VMXfile of the guest machine.
for example
now press I and add this line anywhere.
(Change the ethernet0 to match your local ethernet number)
Now save and exit it by pressing :wq
Now start V-Sphere ESXI client and start the machine as you normally do 🙂
Congrats you are UP with new MAC address activated 😀
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SAMPLE .VMX FILE FOR STATIC MAC address
In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred Account
Following is an sample of working .vmx file for static mac address.
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In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred Card
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In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred Mean
Regard’s
Syed Jahanzaib