Wireless disconnects

Discussion in 'HyperWRT Firmware' started by mskreis, Mar 2, 2006.

  1. mskreis

    mskreis Network Guru Member

    I have two 54GS v4 running Thibor 14. Both are set to AP + WDS and using WPA. One is connected to my DSL modem.

    Roughly once per day while surfing wirelessly from my laptop, I momentarily lose my signal and have to "repair" my connection. Normally my connection is "excellent" at all times. Any ideas/suggestions?

  2. Aq_lynch

    Aq_lynch Network Guru Member

    Solution for you

    Make sure that only one of the routers is set as the DCHP server. If both are set to be DCHP servers you will get a conneciton but then it will fail to connect.
  3. mskreis

    mskreis Network Guru Member

    Re: Solution for you

    Thanks but only the one connected to my DSL has DCHP enabled.
  4. wicche

    wicche Network Guru Member

    I had the same problem with dropped connections too. I changed my wireless security to WEP 128bit and now I have no problems. I had the same issues with Netgear wgt624 and changed it to wep security all is ok.
  5. mskreis

    mskreis Network Guru Member

    Yea, I'm beginning to suspect that WPA is the culprit. I don't recall having this problem until I started using WPA.
  6. ceemar

    ceemar Network Guru Member

    I'm having the same problem both with WPA Preshared Key and WPA2 Preshared key. I had this problem with the "original" Hyper WRT firmware and with Thibor 13 c and d and 14.

    The connection drops irregularly, sometimes multiple times a day, sometimes not for a few days. At first I thought it only drops when using Bittorrent, but it also drops when there is hardly any traffic.

    I only have to repair the connection, never restart the Linksys router (which sometimes has uptimes of several weeks).

    It drops both when using Windows to configure WLAN and the D-Links Tool.
    "SiteSurvey.asp" only shows one other WLAN close, on RF channel 1 (I'm on RF channel 6).

    I always did "Clear NVRAM, restore factory defaults" after any firmware upgrade.

    The WLAN card I'm using on my PC is a D-Link DWL-G520+.

    The connection drops both when using Windows to configure WLAN and the D-Links Tool. I've tried several driver versions (2.02, 2.04, 3.1).

    My "SysInfo.htm" says:

    Firmware Version:v4.70.8, Hyperwrt 2.1b1 + Thibor14 , Feb 23 2006
    Boot Version:v3.2

    RF Status:enabled
    RF Firmware Version:v4.70.8, Hyperwrt 2.1b1 + Thibor14
    RF Domain:ETSI (channel 1~14)
    RF Channel:6
    RF SSID:secret

    -----Dynamic Information
    RF Mac Address:00:12:17:15:F8:38
    LAN Mac Address:00:12:17:15:F8:36
    WAN Mac Address:00:12:17:15:F8:37
    Hardware Version:2.0

    Is there anybody successfully using the WRT54GS Hardware Version 2.0 with WPA?

    Does anybody have an idea what setting I could change so that the WLAN doesn't disconnect? Or is it the fault of the D-Link WLAN card?


  7. ceemar

    ceemar Network Guru Member

    Forgot to mention: the RF signal strength is always very good, four to 5 bars are green.
  8. mskreis

    mskreis Network Guru Member

    This is exactly the behaviour I've noticed. I too only need to "repair" the connection. This occurs on both my Dell and IBM laptops. I really think its the WPA and I'm going to try WEP instead.
  9. myersw

    myersw Network Guru Member

    Don't over look the possibilty of bad drivers for your wireless NIC. Check on the manufacturers web site and see if they have more current drivers. Have seen this happen at work as well as here at home.
    I am currently running Thibor 14 on a wrt54g v1.1. The PC l am using right now has a D-Link g122 usb wireless dongle in it and am using WPA security. PC is setup to duel boot Windows XP and Mandriva Linux. Wireless connection was solid on the Linux boot but would drop out on the XP boot at radom intervals. Downloaded newer drivers from D-Link and now the XP side is solid as well.
    Just a thought
  10. ofbarea

    ofbarea Network Guru Member

    This happens to me with my USB adapter. It is WUSB54G V2. If I let windows drive the USB card, I get frequent disconections. If Linklsys applet drivers the USB car everything works just fine.

    Try updating your drivers or do not allow windows to drie your card.

    When my card is handled by Windows I get disconections with Linksys stock firmware, Tofu, Thibor or DD-WRT.
  11. galileo2000

    galileo2000 Network Guru Member

    Don't know what you guys are tlking about. I use WDS + WPA Personal + TKIP and everything is fine.

    2 WRT54GL on the network, Slingbox is streaming excellent signal. i disconnected my 802.11g USB card, I no longer need it.
  12. mskreis

    mskreis Network Guru Member

    Good idea. I'll try and find updated drivers. If true, this suggests that the drivers are responsible for this behaviour with an old Dell Inspiron 5150, a brand new Dell Inspiron 9300, and a top of the line IBM laptop.
  13. will792

    will792 Network Guru Member

    I have a similar problem with somewhat comparable configuration; WRT54GS 2.0 w. DD-WRT, WRT54G 2.2 with DD-WRT, WDS over WPA/AES PSK, Thinkpad T43 with 2200BG, Thinkpad T23 with Atheros based G card.

    It looks like the latest Intel drivers for 2200G (ProSet 10.X package) make connectivity more stable but do not eliminate disconnects completely. Elimination of ThinkPad AccessConnections helped a little as well.

    My guess is that many factors are involved but I also know that switching to WEP solves the connectivity problem completely. I wish I knew less about WEP vulnerabilities and used it instead of WPA. My current choice is wireless security or wireless stability. I choose security.
  14. myersw

    myersw Network Guru Member

    See previous port for myersw. I have a wrt54g v1.1 as well as a wrt54gs v.4. Both of these are running Thibor 14 and I am using WPA security without any problems. The laptop duel boots xp and linux. Until I updated the xp wireless drivers I had disconnects but the linux connection was 100%, never dropped. With the updated xp drivers for the usb dongle the xp connection is also 100%.
  15. mskreis

    mskreis Network Guru Member

  16. jchuit

    jchuit Network Guru Member

    wrt54g and the Intel 2200 wireless client

    Sometimes the wireless connection is lost?

    A friend of my had the same problem (intel 2200bg), at first I installed a more recent firmware on his wrt54g-v2.2. (Txpower=28mw)
    This didn't solve it, then I changed from wpa to wep key. Problem still there.
    Later I played around with his windows settings and I saw a lot of wireless network even some without encryption. Changed to channel 11, but no luck either.

    Then I saw that the most of the wireless data was send as 802.11b packages (DSSS mod), while the radio signal was very strong(interference???). Doubling the radio power did the trick, all data is now send as in the fast OFDM modulation. And the problem is fully solved.

    Maybe this info helps a littlebit.
  17. LAGMonkey

    LAGMonkey Network Guru Member

    Ive seen the same problem using WPA, but i decided to change it to WPA2. So far so good.
    Just have to see how long it lasts
  18. mskreis

    mskreis Network Guru Member

    Can WPA2 be used with WDS?
  19. Thibor

    Thibor Super Moderator Staff Member Member

  20. lwf-

    lwf- Network Guru Member

    I am running my wrt54gs at 56mw and my ipw2200bg doesn’t drop. At the default value it drops all the time and the network card needs to be restarted to work again.
  21. mskreis

    mskreis Network Guru Member

    FWIW, I've been using WEP for almost a week now and none of my wireless devices have dropped their connections. It appears that the problem is related to WPA and perhaps drivers and not transmit power. I'm going to continue to use WEP for another week or so. If no disconnects occur I'll start trying the latest drivers for my wireless cards and give WPA another try.
  22. myersw

    myersw Network Guru Member

    Am wondering if good old Windows Wireless zero config could be entering into this problem. Seems that in Microsoft's wisdom wireless config will search every 3 minutes. Problem is it may see something it likes better then the current connection. See the article on this link for more. Also you can find more info on the web about this problem.


  23. SirFredrick

    SirFredrick LI Guru Member

    I was having the same problem. I went from WPA to WPA2, no difference. I didn't try WEP, but I noticed a bunch of DHCP errors in my event log shortly before the connection went down. I thought that was weird because the connection already had an IP, and on the router I'm using static DHCP, so there's no reason windows should have been looking for the DHCP server again, let alone choking on it.

    I hardcoded the IP and DNS settings and it hasn't gone down since. I'll post again if it doesn't, but in the meantime that's something you might want to look into as well.
  24. digitalgeek

    digitalgeek Network Guru Member

    wireless diconnects...

    I have a similiar problem... except it happens with my powerbook as well... when I was using wep... the powerbook would connect on it's own at boot. when I switch to wpa required manual connection. my windows laptop (using a linksys nic) has difficulty connecting aswell. after reading this discussion I have decided to switch back to wep.
  25. mskreis

    mskreis Network Guru Member

    WEP has been trouble free for almost a month. I have not had a single disconnect since changing from WPA.
  26. ceemar

    ceemar Network Guru Member

    Switching from WPA to WEP is not progress but a step back that I would not really consider a solution to the problem.

    I finally solved my problem with disconnects by installing an older driver revision for my D-Link NIC on my PC. D-Link actually pulled the newer version that I had installed previously from their web site, so it is probably buggy. I didn't have any wireless disconnects ever since.
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