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[Xen-users] changing MAC address makes VM unreachable

from [Tim Freeman]

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Subject:	[Xen-users] changing MAC address makes VM unreachable
From:	Tim Freeman <tfreeman@xxxxxxxxxxx>
Date:	Mon, 31 Jul 2006 23:24:52 -0500
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I'm using 3.0.2-3 and have gotten a matching user report from someone using
3.0.1.  

After powering off a VM, changing its MAC address and rebooting, it becomes
unreachable.  

I made sure all ARP caches expired first before trying to contact the VM.
Looking at the network traffic shows the ARP who-has query hanging
indefinitely.  "brctl showmacs xenbr0" also shows the old, working entry has
gone before the problem occurs.  I tried arping -A variations from within the
VM with no success.

Before I investigate further, does anyone know why this is happening and/or any
workarounds?

Thanks,
Tim 

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