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- In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred One
- In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred Mean
ESXI 5.5 static mac address “conflicts with VMware reserved MACs”
Dec 06, 2013 ESXI 5.5 static mac address “conflicts with VMware reserved MACs” Filed under. 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. When the Mac address changes option is set to Reject, ESXi does not honor requests to change the effective MAC address to a different address than the initial MAC address. This setting protects the host against MAC impersonation. The port that the virtual machine adapter used to send the request is disabled and the virtual machine adapter does. Static mac address in Esxi 5.5 “conflicts with VMware reserved MACs” Manish Jha Virtual MAC address assignments are based on Microsoft’s organizationally unique identifier (OUI) registration with the Institute for Electrical and Electronic Engineers (IEEE).
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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
/vmfs/volumes # ls
In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred One
52a18cdd-49376389-86aa-000c29d1de32 61031d71-0233e8da-be74-f942274c16c3
52a18ce5-9d0863e6-e50b-000c29d1de32 8901537a-ad66db83-fd1f-38ac926cce01
52a18ce7-bd9d6e2a-dacf-000c29d1de32 datastore1
/vmfs/volumes #
52a18ce5-9d0863e6-e50b-000c29d1de32 8901537a-ad66db83-fd1f-38ac926cce01
52a18ce7-bd9d6e2a-dacf-000c29d1de32 datastore1
/vmfs/volumes #
/vmfs/volumes # cd datastore1/
/vmfs/volumes/52a18ce5-9d0863e6-e50b-000c29d1de32 # ls
123
/vmfs/volumes/52a18ce5-9d0863e6-e50b-000c29d1de32 # ls
123
![In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred In Esxi Mac Address Manual Vs. Automatic Which One Is Preferred](/uploads/1/2/6/4/126400451/654895361.png)
/vmfs/volumes/52a18ce5-9d0863e6-e50b-000c29d1de32 # cd 123
/vmfs/volumes/52a18ce5-9d0863e6-e50b-000c29d1de32/123 # ls
/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
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
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 Mean
![Which Which](/uploads/1/2/6/4/126400451/215334510.jpg)
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Regard’s
Syed Jahanzaib
Syed Jahanzaib
24.85100067.008300