From: itsfortarget iwillgetit (itsfortarget@gmail.com)
Date: Wed Jun 25 2008 - 10:20:55 ART
Dear Sadiq,
Its is cisco ip phone, and a pc connected to it.
On Sun, Jun 22, 2008 at 3:04 PM, Sadiq Yakasai <sadiqtanko@gmail.com> wrote:
> Hey Ananth,
>
> A Cisco IP phone will always send tagged traffic on the Voice VLAN if one
> is configured and hence it should not be seen on the Access VLAN, thats why
> I think its a tricky one.
>
> But a quick question for "Itsfortarget", is the IP phone is Cisco or any
> other vendor phone? I think that could explain why you are seeing this.
>
> Cisco phone would tag their frames right from start using the Voice VLAN
> (42) that they have learnt via CDP. Third party phones on the other hand,
> have a slightly different way to learn about the Voice VLAN and hence, could
> start sending untagged frames on the access VLAN (102) and then eventually
> move to the Voice VLAN to beging tagging frames. Hence we could see their
> MAC address appear on both VLANs (before it ages out, naturally).
>
> Lets see what he comes back with though.
>
> Sadiq
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