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Lanman_4

15 Posts

11532

November 30th, 2005 15:00

Port Based VLAN

I am configuring a PC 3448P switch to be used by a data network and a voice network. The voice network has phones that are vlan aware and the port that these devices are attached to on the switch need to pass tagged packets to the phones. The data network has computers that are vlan un aware and the port that these devices are attached to on the switch need to pass un tagged packets to the computers (strip off any tagged packets on the way into the switch). The phones and computers are daisy chained together so there is only one LAN cable used for both devices, so both devices are using the same ports on the PC 3448P. To allow this setup do I just have to setup 2 VLANS, one for Voice, one for Data and then assigned each port that will be used as T (Voice) and U (Data)? What about assigning PVID's ??? The purpose of this VLAN is to allow the voice traffic a higher priority on the LAN (these setting are configured in DHCP). I have not setup a VLAN before and have no idea how to set up the ports to allow this packet transfer.
Thanks in advance for any help,
L_4

DELL-Cuong N.

1K Posts

December 1st, 2005 13:00

I may not fully understand the requirement so let me restate:

  • You have a workstation connected to a VoIP phone which sounds like it has a built in switch?  So you connect the uplink port from the phone to the 3448?
  • So your VoIP phone is VLAN aware but your PC is not.  Can your phone take care of untagging the traffic going to the workstation?  It might be a function of the phone switch?

Anyway, if the phone is not a switch and does not have the function to untag the data traffic for the workstation, then you could try this on the 3448 port:

  • Setup a VLAN for voice (say VLAN 10).
  • Setup a VLAN for data (say VLAN 20).
  • Add VLAN 10 to the port as "tagged" (this means that voice packet will be sent out tagged from the port).
  • Add VLAN 20 to the port as "untagged" (this means that the data packet will be sent out untagged from the port).
  • Setup the PVID on the port to be 20 so that untagged traffic will come into the switch (from the workstation) and be automatically tagged as 20.  This assume that the phone only sends tagged traffic (tag 10).

Note again that you might want to see if your phone switch has the capability of managing your VLAN for you.

Cuong.

betoven

1 Message

April 6th, 2006 19:00

Hello Cuong I Have a similar situation, I have a cisco VoIP solution using 7912 and 7940 IP Phones with call manager etc., then I need to configure 2 Vlan one for voice and one for data how can i configure this in my 3424p powerconnect switch?

 

Thanks

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