Clarification on how QOS works

Discussion in 'DD-WRT Firmware' started by ngiovas, Feb 26, 2006.

  1. ngiovas

    ngiovas Network Guru Member

    I just loaded dd-wrt v23 to gain better control over my network and to try and improve QOS for my VOIP (vonage). I ran a couple of speed tests and set the QOS up/download speeds at 90% of what the tests came back with. I then set the MAC for my PAP2 phone adapter to premium. Now that I have done this, my downloads on my PC have fallen greatly. What can I do to improve the speeds on my PC without sacrificing quality on my VOIP?

    I have a 4MB internet connection and have the download set to 3000Kb for QOS, but I typically only see 1700 Kb downloads with QOS turned on. With QOS turned off, I average 3200Kb and see peaks at 4200Kb.

    When you only set QOS for one device, how does the router handle traffic for other devices? Why wouldn't they be allowed to run at full capacity when the PAP2 is not in use?

    Any info would be greatly appreciated. Also, any links to info on QOS would also be appreciated.

  2. Cyberian75

    Cyberian75 Network Guru Member

    Try the max for downstream.
  3. Lazybones

    Lazybones Network Guru Member

    1. You need to set the QOS cap lower than your connection speed.. The resone for this is so that QOS has headroom to scale on the fly.

    2. All unassinged protocals and devices are assumend at Normal priority.

    My recommentation would be to set HTTP and HTTPS to premium and redo your speed test.. You should now get speeds up to your QOS cap and youw VOIP would still have higher priority.

    Also Add any P2P protocals to the BULK category this will ensure that they do not slow your surfing or VOIP.

    QOS does add overhead to your connection but it should ensure all services get a chance to work instead of one service stepping all over another.
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