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Help needed: QOS works on U/L but not on D/L w/Thibor 201105

Discussion in 'HyperWRT Firmware' started by tweber, Dec 15, 2005.

  1. tweber

    tweber Network Guru Member

    I've had great results setting up QOS for my Vonage accnt. Router is WT54GS with Thibor's latest firmware. My dsl upload speed is about 428, dl is 2500. I have the router set on highest via mac address and manual QOS at 300.

    Quality on outgoing calls (from our home) goes in the tank when I am downloading using FlashFXP. I set the ports in FlashFXP as 1024 through 1025. I then set up a custom app in QOS as FTP for ports 1024 and 1025 and put them at Low priority.

    If I'm on the phone at home and start the FTP program my call quality breaks up. The person on the other end had good quality which I take to mean that our upload speed is protected and our download isn't. Stop the FTP program and quality returns to normal.

    Can anyone tell me what I'm doing wrong?

    Thanks for all of the help I've gotten here and for Thibor's work.

  2. NateHoy

    NateHoy Network Guru Member

    Hmm.. I'm no QoS expert, of course, but I can't see how QoS COULD protect your download bandwidth.

    QoS cannot control the rate at which packets arrive to your modem. It only controls the priority of packets on your actual network. "Upstream" or outbound QoS works because your router is aware of how much bandwidth you have, and starts throttling back "bulk" applications to make room for "premium" ones when that limit starts approaching.

    But it doesn't send a signal out to your ISP saying "these inbound packets are more important than those". Your modem dumps them all into the router, which prioritizes then AFTER receipt. If your problem was that your ISP could feed your router beyond its saturation point, then QoS would work great - packets would be prioiritized. But most Internet connections cannot even BEGIN to tax a router, so the inbound QoS does do priority but the effect is not noticeable.

    So your only hope, if I understand how this all works, would be to slow down the rate at which you request packets on your FTP client.

    If your FTP client has the sophistication, you might want to limit its download bandwidth and "reserve" space for Vonage. Of course, that basically tells the FTP client to delay its acknowledgments long enough that the remote is not continuously streaming data. It also limits your FTP speed ALL the time, whether you are using Vonage or not.
  3. gaster

    gaster Network Guru Member

    There should be different ways of getting the same thing done.
    You say you have the Vonage router set to high priority by Mac address. First check to see there is no simple typo. If not, then maybe try setting the ethernet port the Vonage is connected to as the highest priority and removing the mac address rule.
  4. tweber

    tweber Network Guru Member

    thanks for the ideas

    Interestingly, I turned off the game priority checkbox, where I had configured the FTP app, and just let the rest run. It may have been coincidence, but the dl speed decreased to about 1790. However, the quality was still whacked for the incoming calls. I turned off FTP while talking and it was fine again.

    Interesting that QOS can't reserve inbound traffic. I'll just limit my downloads to occur when we're sleeping.

    Thanks for taking the time to reply.


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