When i tried to search about Configuring Voice VLAN, I found :
1. "switchport voice vlan <id>". This is the most common setting, the IP
phone is asked by CDP to send the packets tagged by the VLAN <id> to
distinguish from PC packets.
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".
[u]In case 2 or 3[/u], 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
In the above quote he has mentioned case 2 and 3, what about case 1 ?