From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Tue Jul 11 2006 - 08:18:36 ART
> Bottom line, I would either configure trunk, allowed vlan and native
> vlan, either configure mode access, access vlan and voice vlan.
>
> Any insights?
AFAIK, voice vlan is a cisco hack to let the phone know out of band
(CDP) what vlan to tag voice traffic into.
Cisco usually mixes many ingredients to get a service running. That way,
among other things, you get the value of a pure cisco solution...
Also, the way phone trunks are brought up has changed along the time. It
is now the case that an access port will turn into 2 vlan trunk if a
phone is discovered there. It was not always like that, if I remember well.
So this particular case does not only involve "plain RFC" trunks, but
cisco way of dealing with QOS for IP telephony.
-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
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