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Date: Fri, 19 Jul 2013 12:39:06 +0200
Subject: Re: Same MAC address in 2 different VLANs
From: joost@jodocus.org
To: questions@freebsd.org,
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Cc: Olivier Nicole <Olivier.Nicole@cs.ait.ac.th>
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> Hello,
>
> Could any one comment about the use of the same MAC address in 2
> separate VLANs?
>
[...]
>
> Will this be an issue?
>

You might run into problems if the two (virtual) systems are attached to a
different port on your switch. Some switches don't take the vlan into
account when learning on which port a mac address exists. These switches
will see the mac address jumping between ports all the time.



Joost.