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Date: Fri, 01 Jun 2007 12:49:30 +0200
From: Axel Kittenberger <axel.kittenberger@univie.ac.at>
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Subject: [Qemu-devel] Mac addresses hashing of network cards
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To: qemu-devel@nongnu.org

Hi list! I got a suggestion.

I first posted this to kvm, but they said its a qemu issue. Just have a 
new host server which several guests, set up networking via bridges, and 
wondered why it didn't work reliable. Surprise, Mac-Address Konflikt! 
For now I just hard-set some other Mac-Adresses in the Guests.... Random 
Macs have their disadvantage of confusing dhcp servers, disturbing 
ARP-Tables and so on.

So Suggestion: Make a Mac-Address of the guest hashed from the image 
path+filename (if available). So the same "machine" always gets the same 
mac-addresses, different "machine" get different macaddresses.