VLan help

[leigh_boy]

hi guys im in a bit of a pickle here, im heading over to our china office next month and they are moving to a new office that only has enough network ports for either pc'c or ip phones, the issue is china telecom want something silly like 10k £ and 6K in line rental to install 30 pstn lines (current setup) and run cables all round the building so we scratched that off, so we are going to install voip phone system, but we will have to use the lan jacks on the phones to pass through to the computers.

now that i have planted that concept, I will need to Vlan the phones from the pc's

so it will look a bit like this

server-----switch -----phone--------pc
-------------------- vlan20 ------ vlan 1

can this be done?
i would have thought so just dependent on the hardware.
I then need QOS so that phones get priority in the switch using hp 2920's
oh and then i need the server to deliver dhcp to both vlans


help!?

 

[leigh_boy]

ok so with IP phones it is good practice to separate them from the rest of the network so that QOS can be setup for the best performance, with cisco phones they use dhcp 150 and this will tell the phone what vlan to go on and the pc port on the phone will then trunk the other vlan for the pc, not complicated
when i say switch i mean switch the diagram is not perfect lol but basically the phone system is on 1 vlan and everything else is on another and the router will r in this case cisco ASA will route the phone vlan to the gateway for any voip calls although most likely will go out over PRI on a tagged port