WRT54GS Wireless connection speed dropping...

Discussion in 'Cisco/Linksys Wireless Routers' started by Nato, Aug 1, 2005.

  1. Nato

    Nato Network Guru Member

    I have a WRT54GS v1.1, and am experiencing a strange issue... my wireless connection doesn't usually drop (after much firmware trial and errors) anymore, but all the firmware swapping in the world has not fixed the following problem: My connection speed, while ordinarily it should be 54mbps, drops down to 1.0 mbps after an indeterminate time while I am connected. I don't understand why, and was hoping that anyone else could shed some light on the issue.

    First, let me get it out of the way that I'm using a WRT54GS, the corresponding wireless card for the NAT.

    When I originally connect, the speed is right up there.. then falls, hitting all the bumps along the way.. 36, 24, 18, 5.5, 2, 1mbps and holds. It occasionally skips back up to 54mbps once in a while, but hits 1.0 again very quickly. The connection, as I stated, almost never drops anymore.

    Things I've tried: changing channels/attempting to remove interference in the way (yes, I've used netstumbler to check out what channels the few neighbours in the area that have wireless are on as well), various firmwares including several of the official linksys versions and a couple custom firmwares (currently settled on DD-WRT, the latest one), changing the placement of the unit in my house, changing drivers for my own wireless network card... most everything I could think of. The signal boost from the DD-WRT firmware didn't help.

    Oh, yes, messing around with the speedbooster/afterburner stuff didn't really help things either, although, for a split second I thought it did. Then, I was thoroughly disappointed. :(

    So, anyone have any ideas? I'm really grasping here... I hate how much of a finicky technology wireless ethernet seems to be... :?
  2. -mb-

    -mb- Network Guru Member

    Quite possibly an interference issue. Nearby cordless phones or Microwave ovens can degrade the connection even if your devices are close to each other.
  3. Nato

    Nato Network Guru Member

    Thanks for the response!

    Can this degrade the connection even while those devices are inactive? This phenomenon occurs even in the dead of night, while there are no phone calls nor microwaving of food. Like right now, as I type this, for instance. :)

    Is there an easy way to test for interference on the connection? Does anyone have any data available as to what should be acceptable signal noise ratios (or whatever unit) if there is?
  4. Nato

    Nato Network Guru Member

    alright, so, basically I'm a genius and didn't notice that netstumbler has a handy SNR detector and all that.

    It SEEMS to be fine... I think the lowest that Netstumbler put it at was around 40-41 dbs.

    THe plot thickens, however. I stay connected perfectly fine at the grand ol' speed of 54 mbps, but the minute my connection speed starts to drop a quick drop of the wireless zero into netstumbler reveals that the wireless signal becomes super flaky... reminds me of quake 2 days when a person had to watch a lot of packet loss on the netgraph in the game :?

    AND, a reboot of the NAT fixes the problem for an indeterminate amount of time. It seems to be random. This is a relatively new development... when I was using the official linksys firmware before, it would fix it only for maybe 5 minutes - but using the DD-WRT firmware, it stays connected and fixed for quite a while. At least 20-30 minutes.

    Anybody? :cry:
  5. goixiz

    goixiz Network Guru Member

    what about other computer

    Try a different laptop to eliminate the issue of your laptop
    Try ad wired LAN computer to eliminate the issue of your Service provider
  6. Nato

    Nato Network Guru Member

    Thanks for the response, but the issue isn't my service provider, and I'm not using a laptop -- the issue is with a dropping wireless connection speed in the house, easily visible through windows.

    When wired directly to the NAT, or wired directly to the cable modem itself for that matter, things are perfect.

    Now, to add more info to the mix, using the load info from the dd-wrt firmware, what I mentioned about rebooting the router still holds true - that it seems to fix the problem temporarily, but when the connection speed is dropped lower, the router is under little-to-no load whatsoever.

    I noticed in my googling for information someone else experienced this issue on dslreports.com, but were unable to find a resolution. Anyone else with any other information for me? Any other ideas? I appreciate any and all ideas or responses.
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