From: gladston@br.ibm.com
Date: Wed Jun 29 2005 - 10:27:04 GMT-3
Do you known how IP Phone send voice and data traffic (from the pc attached) to the switch when the command 'switchport voice vlan dot1p' is used?
I found different information when researching.
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2. "switchport voice vlan dot1p (NOT dot1q). This is a tagged packets
with VLAN ID = 0.
3. "switchport voice vlan untagged". Although it is stated as untagged,
the packets is actually tagged with VLAN ID = 1025".
In case 2 or 3, I think the switch will just accept it even it is a
non-trunking port. It is because the packets is tagged with special VLAN ID.
(I would like to be confirmed if anyone know there is a document taking
about it.)
http://www.groupstudy.com/archives/ccielab/200311/msg01225.html
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And another discussion said vlan 0 is a typo, it is not really vlan 0.
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