Video QoS on PC6248 and PC5548

Posted on 2012-09-18
Last Modified: 2012-11-06

Maybe a stupid question but here it goes..

I have a 6248 with 4 vlans. 3 vlans are for regular data traffic and one vlan for video traffic. The three vlans for data are routable with IP interfaces so they talk to each other. The vlan for video is isolated and only a video communication system goes here.

My question is since the only traffic flowing in this vlan is the video traffic, do I need to configure QoS on this vlan? Users are experiencing really poor video quality with a lot of packet drops. In that case how do I apply QoS  on that vlan.

The 6248 is trunked with a 5548 where the video equipment is attached.
Question by:Bes4dmin
    LVL 17

    Accepted Solution

    If the video vlan shares links with data vlans, it's a good idea to set up QoS.
    The exact setup would depend on your video devices, but a possible option is:
    - enable global CoS on both switches at QoS/CoS Global/CoS Settings
      - CoS: enable
      - Trust: COS (802.1p)
    - set a default priority on the 5548 on the ports connecting to video devices at QoS/CoS Global/Interface settings

    If you know that the video devices mark their traffic with DSCP, that would be better than trusting COS/802.1p, if possible.

    LVL 1

    Author Comment

    Hi thanks for the reply.
    Do you have some sample config for the PC6248?
    LVL 1

    Author Comment

    anyone with some sample config with quos, cos included for the 62xx?
    LVL 17

    Expert Comment

    On the 6248, I think you are good with a simple
    qos trust cos

    Open in new window

    if you do the COS marking on the 5548.

    Any info regarding QoS handling from the manual of the video gear would be helpful.
    If we know it marks traffic with DSCP, then life is simple, as we don't even have to mark on the 5548.


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