From: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
To: Axel Kittenberger
<axel.kittenberger-4JhlDu4IDl0juwv8T7myQQ@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: Mac-Address uniqueness
Date: Thu, 31 May 2007 18:14:18 -0700 [thread overview]
Message-ID: <465F72EA.9080608@zytor.com> (raw)
In-Reply-To: <465E98B7.5050402-4JhlDu4IDl0juwv8T7myQQ@public.gmane.org>
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
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next prev parent reply other threads:[~2007-06-01 1:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-31 9:43 Mac-Address uniqueness Axel Kittenberger
[not found] ` <465E98B7.5050402-4JhlDu4IDl0juwv8T7myQQ@public.gmane.org>
2007-05-31 10:42 ` Dor Laor
[not found] ` <64F9B87B6B770947A9F8391472E032160C0EFE07-yEcIvxbTEBqsx+V+t5oei8rau4O3wl8o3fe8/T/H7NteoWH0uzbU5w@public.gmane.org>
2007-05-31 12:18 ` Axel Kittenberger
2007-06-01 1:14 ` H. Peter Anvin [this message]
[not found] ` <465F72EA.9080608-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2007-06-01 6:26 ` Avi Kivity
[not found] ` <465FBC08.7000102-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-01 6:43 ` H. Peter Anvin
[not found] ` <465FC01F.4050105-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2007-06-01 13:09 ` Daniel P. Berrange
2007-06-01 10:19 ` Axel Kittenberger
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