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Tagged VLANS

Hi All,

I am relatively new to VLANS although I have a good understanding of how they work.

However I don't know anything about VLAN tagging.

There are some ports here that are tagged to treat traffic from VOIP devices differently to that for "Data", this has been done on Extreme X450 switches, can anyone tell me how the switch determines which traffc is from which device.

Most PC's are "piggybacked" from the phones but the switches know that the PC  is on one VLAN and and Phone on another....

1 Solution
In most cases the phone is tagging its traffice and the pc port is not tagged. Thus the switch knows which device belongs to which vlan. The interface on the switch is essentially a dot1q trunk.
techmissAuthor Commented:
Yes, found the VLAN ID set on the phone.

Many thanks

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