Question : HP PROCURVE 2520 VLAN tagging, for VOIP

Hi All.

I have the following situation but do not have a great deal of expertise with VLANs, so am looking for assistance.

We have our Data VLAN and a Voice VLAN.

We want to run data from the PC port on the back of the IP Phones, hence the VLANs.

HP Procurve 2520
VLAN 20 - DATA
VLAN 30 - VOICE

VLAN 20 - 192.168.204.x
VLAN 20 IP - 192.168.204.2
VLAN 30 - 10.10.30.x
VLAN 30 IP - 10.10.30.2

Telephone system (10.10.30.3) will provide DHCP to the 10.10.30.x network
Windows Server (192.168.204.4) will provide DHCP to the 191.168.204.x network

In theory. we should be able to either patch a PC directly into any of the POE ports, or patch a phone in and run data from the back of the phone.

I am confused, though, on how the ports (1-8 POE) should be tagged, and also the issue of trunking (Ports 9 and 10 are Gigabit ports)

Any help greatly appreciated - if you need more info, please let me know.

cheers.

Answer : HP PROCURVE 2520 VLAN tagging, for VOIP

A port connected to a PC, printer or server should normaly be untagged vlan 20.
A port connected to telephone system untagged vlan 30.

A port with phone+PC should be untagged vlan 20 and tagged vlan 30.

One port making link to an other switch with more vlans should have same mix of tag/untag vlans in both ends, but remember max one untagged vlan, like:
a) untagged vlan 20 and tagged vlan 30 on one sw to untagged vlan 20 and tagged vlan 30 on other sw or
b) tagged vlan 20 and tagged vlan 30 to tagged vlan 20 and tagged vlan 30 or
c) tagged vlan 20 and untagged vlan 30 to tagged vlan 20 and untagged vlan 30

IF you for some reason would make an aggregated link with 2 ports on one sw connecting to 2 ports on an other swich, then this aggregated link, in HP terms known as a trunk, then the trunk would be tagged/untagged like a,b or c

HTH