Re: Why should static MAC address match one of the port MAC addresses - bug?

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On Sun, 19 Dec 2010 23:26:22 +0100
Rolf Fokkens <rolf.fokkens@xxxxxxxxxx> 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 Windows ARP cache is no longer valid and has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. 

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