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[Qemu-devel] Mac addresses hashing of network cards

From: Axel Kittenberger
Subject: [Qemu-devel] Mac addresses hashing of network cards
Date: Fri, 01 Jun 2007 12:49:30 +0200
User-agent: Thunderbird (Windows/20070509)

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.

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