From: Stephen Hemminger <shemminger@vyatta.com>
To: Rolf Fokkens <rolf.fokkens@wanadoo.nl>
Cc: bridge@lists.linux-foundation.org
Subject: Re: [Bridge] Why should static MAC address match one of the port MAC addresses - bug?
Date: Mon, 20 Dec 2010 10:37:54 -0800 [thread overview]
Message-ID: <20101220103754.7d18de50@s6510> (raw)
In-Reply-To: <4D0E868E.4010309@wanadoo.nl>
On Sun, 19 Dec 2010 23:26:22 +0100
Rolf Fokkens <rolf.fokkens@wanadoo.nl> wrote:
> Hi All,
>
> Despite of what Stephen explains, I'm having the problem Michiel
> describes as well. I have a bridge br2 containing 1 (but potentially
> more) tap interface for kvm. Windows 7 VM doesn't like the bridge mac
> address to change, so I try to make it fixed.
>
> ifconfig br2 hw ether 02:00:00:00:01:02
>
> Interface br2 becomes instantly unreachable from the VM (via the tap
> interface). No arp response or anything else.
>
> So, Michiel's claim seems to be true: the bridge mac address should
> apparently be one of the bridge interfaces. But I don't see the logic,
> this seems like a bug to me.
>
> kernel is Fedora kernel-2.6.35.9-64.fc14.x86_64.
>
> Cheers,
>
> Rolf
The address you change the address, it is like you changed the MAC address
of a card on the network. Windows ARP cache is no longer valid and has
to time out.
next prev parent reply other threads:[~2010-12-20 18:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-19 22:26 [Bridge] Why should static MAC address match one of the port MAC addresses - bug? Rolf Fokkens
2010-12-20 18:37 ` Stephen Hemminger [this message]
2010-12-20 20:03 ` Rolf Fokkens
2010-12-20 23:15 ` Stephen Hemminger
2010-12-26 17:21 ` Rolf Fokkens
2010-12-26 18:31 ` Stephen Hemminger
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