Pls help, slow wireless performance driving me crazy!

Discussion in 'Networking Issues' started by LinksysVoIP, Feb 16, 2006.

  1. LinksysVoIP

    LinksysVoIP Network Guru Member

    I have tried everything I can think of to get this solved. The situation is that on wireless, I am only able to download at 1-1.5Mbps on my wireless connection, whereas I can get 5-6Mbps on wired connections (per several download sites, such as I have tried a WRT54GX2, WRT54GS (using both Linksys and DD-WRT firmware) and my Actiontec modem's wireless. I have tried on several computers (all on Windows with the latest updates) with a mix of Intel 2200BG and a Linksys SpeedBooster PC Card. So far, the only way I get get full speed on wireless is to bootup my SuSE 10.1 install on one of the laptops with the 2200BG. On SuSE, it works just fine. Also, I'm sure its not a program I am running, since I boot Windows in Safe Mode with Networking and still get 1.5Mbps. What is going on here? :cry: :cry: If anyone can help, it would be very much appreciated.
  2. LinksysVoIP

    LinksysVoIP Network Guru Member

    I should also add that I get about 18Mbps throughput when using IPerf to test throughput between a wireless computer and a wired computer. IPerf also shows ~90Mbps between wired computers. Finally, it makes no difference whether I use Firefox, IE or Opera.

    Thanks in advance!
  3. howardp6

    howardp6 Network Guru Member

    18 Mbs is a little low, you should be getting about 21-22Mbs between a wired and wireless connection. I was getting about 22.3Mbs as measured by IPERF with a WRT54G v1.0 and a WMP54G v2.0. For my WRT54GX v.10 and WPC54GX v.10 I was getting 41.7Mbs. That is with a very large RWin.
  4. LinksysVoIP

    LinksysVoIP Network Guru Member

    I reduced the RWin to 61440 and my wireless speed has come up, but only to about 3.5-4Mbps.
  5. t4thfavor

    t4thfavor Network Guru Member

    did you try changing the channel to a non used channel.

    it could be due to interference and dropped packets not meant for your stuff
  6. LinksysVoIP

    LinksysVoIP Network Guru Member

    Yep, I've changed the channel. Its got to be the RWin. If I blank it out in Dr. TCP, the speed goes back to 1.5 Mbps. I thought that Windows XP was supposed to automatically adjust the RWin? Is there a guide on manually setting the RWin? Thanks!
  7. LinksysVoIP

    LinksysVoIP Network Guru Member

    Problem solved! :cheering: RWin of 65535 and I now get 5.1Mbps just like my desktop. Thanks for the input!
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