1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Connectivity issues using 2xWRT54GL v1.1 in WDS

Discussion in 'Networking Issues' started by vanshyp, Jan 23, 2010.

  1. vanshyp

    vanshyp Addicted to LI Member

    Hi everybody!

    I've been happily using a two-router (WRT54GL v1.1) WDS setup for more than a year. I always use the latest official Tomato firmware.

    I've had a lot of downtime lately, with the router setup totally locking me out and even the admin interface inaccesible. First internet traffic slows to a crawl, then I get the infamous "Unidentified network" and it just yoyo's between this state, "Limited access" and "Connected to wireless".

    I have no clue what could cause this. At first I thought it was the new Windows 7 installation on my desktop pc (or some update I installed recently) because, well, it's new to the network. I reinstalled it and it briefly worked properly for about an hour. Then same behaviour all over again.

    The good part: I managed to squeeze a log out of the gateway router between two yoyo's. Can anyone look at this and see if this can be solved?

    Currently using tomato 1.23 (downgraded to this version because I read something about dhcp trouble in newer versions).
     

    Attached Files:

  2. t4thfavor

    t4thfavor Network Guru Member

    Looks like far too many DHCP requests by the one PC. I would also make sure that you have disabled the DHCP server on at least one of the routers. Try running with static IP's for a few days, and see if that fixes.

    Usually you find a firmware that works and is stable, and leave it alone unless you have good reason to change it.

    You can also downgrade to an older tomato that was more stable for your app.
     
  3. vanshyp

    vanshyp Addicted to LI Member

    Thanks for the hint! I've been using static DHCP for my machines, but I'll switch to static IP's where possible. Let's see if this fixes anything.

    Any idea why this is suddenly a problem? I have been using Windows 7 and Tomato 1.27 for months now and then suddenly this problem? Any other users experiencing problems with Windows 7, DHCP and Tomato in their network?

    I only have DHCP server enabled on the gateway router. The other router has WAN and LAN DHCP disabled.

    PS: I had downgraded to Tomato 1.23 these past days but the problem reoccured.

     
  4. vanshyp

    vanshyp Addicted to LI Member

    Switched to static ip's, but problem reoccurs after a few days.

    I think it has something to do with the WDS setup. My two routers don't seem to recognize each other sometimes. Then after a while they find each other again?

    I have disabled spanning-tree protocol for now, because I believe these "tcn bpdu" messages are used by this protocol. Let's see if that fixes anything.

    Gateway router says:
    Code:
    [B]Jan 30 11:11:06 unknown user.info kernel: br0: neighbour 8000.00:00:00:00:00:01 lost on port 2(wds0.1) -- mac address anonymized --[/B]
    Jan 30 11:11:06 unknown user.info kernel: br0: topology change detected, propagating
    Jan 30 11:11:12 unknown user.info kernel: br0: retransmitting tcn bpdu
    Jan 30 11:11:14 unknown user.info kernel: br0: retransmitting tcn bpdu
    Jan 30 11:11:16 unknown user.info kernel: br0: retransmitting tcn bpdu
    Jan 30 11:11:18 unknown user.info kernel: br0: retransmitting tcn bpdu
    <continues for two minutes every two seconds>
    [B]Jan 30 11:13:20 unknown user.info kernel: br0: retransmitting tcn bpdu[/B]
    Jan 30 11:28:02 unknown user.info kernel: br0: neighbour 8000.00:00:00:00:00:01 lost on port 2(wds0.1) -- mac address anonymized --
    Jan 30 11:28:02 unknown user.info kernel: br0: topology change detected, propagating
    Jan 30 11:28:04 unknown user.info kernel: br0: retransmitting tcn bpdu
    Jan 30 11:28:06 unknown user.info kernel: br0: retransmitting tcn bpdu
    <continues every two seconds>
    Jan 30 11:28:16 unknown user.info kernel: br0: retransmitting tcn bpdu
    
    Client router says:
    Code:
    Jan 30 11:13:22 unknown user.info kernel: br0: received tcn bpdu on port 2(wds0.1)
    Jan 30 11:13:22 unknown user.info kernel: br0: topology change detected, propagating
    Jan 30 11:13:22 unknown user.info kernel: br0: received tcn bpdu on port 2(wds0.1)
    Jan 30 11:13:22 unknown user.info kernel: br0: topology change detected, propagating
    <continues ten times>
    [B]Jan 30 11:13:22 unknown user.info kernel: br0: received tcn bpdu on port 2(wds0.1)
    Jan 30 11:13:22 unknown user.info kernel: br0: topology change detected, propagating[/B]
    Jan 30 11:28:16 unknown user.info kernel: br0: received tcn bpdu on port 2(wds0.1)
    Jan 30 11:28:16 unknown user.info kernel: br0: topology change detected, propagating
    
     

Share This Page