Re: Mac-Address uniqueness

H. Peter Anvin
2007-06-01T01:14:18Z

Axel Kittenberger wrote:
>
> Unfortunally all machines detect the same ethernet address
> '52:54:00:12:34:56'. Which you can guess what i means, networking comes
> and goes whatever machine last the ethernet address got hold of from the
> gateway. I tried specifing an ethernet-adress with "-net
> nic,macaddr=$MAC" but this also didn't work through.
>
> For now I just hardseted the mac in all machines to 52:54:00:12:34:57,
> 52:54:00:12:34:58 and so on.
>

This is a Qemuism. I always thought it was dumb, but I guess Qemu
wanted reproducibility over everything.

IMNSHO it would have been much better to default to a random value
(meaning that all except the bottom 2 bits of the first octet are
random, those bits should be set to 10 binary.)

-hpa