Solved

Change VMWare Virtual MAC Address

Posted on 2008-10-16
3
3,228 Views
Last Modified: 2008-10-17
I have a physical RedHat server that runs an application which is licensed by the server's physical MAC Address.  I'd like to run P2V on this server but I need to change the VM MAC address to the same one as the RedHat server.

According to VMWare knowledge base, three entries must be removed from the .vmx file of the newly created virtual server.  Then the following must be added:  ethernet0.address = 00:50:56:XX:YY:ZZ

The MAC address of the RedHat server does not begin with 00:50:56:  The NIC on the RedHat server is embedded so I can not move it to the VMWare host server.

Any suggestions?
0
Comment
Question by:hbsr
  • 2
3 Comments
 
LVL 1

Expert Comment

by:daravuth
ID: 22732871
What happen if you change the complete mac address in the vmx?
00:0C:29 and 00:50:56 are only virtual machine vendor id.

I think you can copy the red hat mac address into the vmx and the vm will still boot.
Be sure to not put the two on the network at same time.
0
 
LVL 4

Expert Comment

by:michote
ID: 22733086
VMware ESX Server virtual machines do not support arbitrary MAC addresses, hence the above format must be used. So long as you choose XX:YY:ZZ uniquely among your hard-coded addresses, conflicts between the automatically assigned MAC addresses and the manually assigned ones should never occur.

That taken from the VMWare site

So I guess the answer is NO.

Your best bet is contact the person issuing the license, and tell the to generate a license for the Virtual Machine, maybe as a trial and if it works for you change your license to that. BTW I swear by VMware it is a great product.

0
 
LVL 4

Accepted Solution

by:
michote earned 250 total points
ID: 22735383
By the way,

The reason VMware will not allow you to do this:

1) There is a standards body that issues the first 3 hex of the Mac address, and those are unique to each provider of network equipment. VMware got assigned 00:50:56. Allowing their virtual net adapters to use any Mac would violate this assignment, and would probably get their assignment terminated.

2) This would allow script kiddies wannabe hackers to impersonate machines and do all sorts of bad stuff. BY knocking down the main server and impersonating the real one.

3) People could use them to circumvent license locked software. I know this is not your case, but it also could be wrongly used to do this.

4) Having same mac as other hardware makes conflicts in your network, and networking equipment. As all assume MAC to be unique. Mac spoofing can be done but requires modified drivers that permit this or modifying PICs in network cards.. As I know none exist for VMware.
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Will try to explain how to use the VMware feature TAGs in the VMs and create Veeam Backup Jobs using TAGs. Since this article is too long, I will create second article for the Veeam tasks.
In this article, I show you step by step with screenshots to assist you - HOW TO: Deploy and Install the VMware vCenter Server Appliance 6.5 (VCSA 6.5), with some helpful tips along the way.
Teach the user how to delpoy the vCenter Server Appliance and how to configure its network settings Deploy OVF: Open VM console and configure networking:
Teach the user how to convert virtaul disk file formats and how to rename virtual machine files on datastores. Open vSphere Web Client: Review VM disk settings: Migrate VM to new datastore with a thick provisioned (lazy zeroed) disk format: Rename a…

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now