Motorola Cable Modem & WRT54G Issues

Discussion in 'Networking Issues' started by XSYLUS, Oct 23, 2007.


    XSYLUS LI Guru Member

    Greetings from Tucson,

    My problem is simple enough but since it only happens about once or twice a day it's difficult to troubleshoot. I am connected to cable internet via a motorola surfboard, however, since the cable jack is in another room I have that modem connected to a WRT54G wireless router. Before that it was connected to a Microsoft MN-700. My issue is that about once or twice a day whether I'm browsing, downloading, or idling (doesn't seem to matter), my connection will start to degrade. I have a ping loop running to test for it and the ping will go from 0% loss to 25% to 50% and so on until I cannot browse any longer. I then have to power-cycle the router (not the cable modem - the wireless router) it seems to me that the problem is either the router or modem but since it only happens occasionally I'm sure what's causing it.

    I've had this issue with both wireless routers, and since I bought the cable modem on ebay I wouldn't doubt there's something wrong with it.

    There's only one computer that connects to the wireless router, all the other computers are networked to that central computer and I've used both usb wifi adapters and a proxim orinoco pcmcia adapter and still end up with the same problem.

    Any reasonable thoughts and suggestions are greatly appreciated, but please do not insult my intelligence :rolleyes:

    Thanks for your time.

    • XSYLUS •
  2. mstombs

    mstombs Network Guru Member

    What version WRT54G? The answer will define options available.

    XSYLUS LI Guru Member

    It's version 2

    I haven't updated the firmware so that's still v2.02.7
  4. Slimey

    Slimey Network Guru Member

    How does your connection act if you just hook up a computer directly to the modem bypassing the router?

    XSYLUS LI Guru Member

    It seems to work, but I haven't connected a computer directly to the modem for long enough to see if it starts degrading. One thing I did try was to connect the laptop directly to the wrt54g via cat5 when it started acting up today and I would get mixed ping responses from the cable modem. So I tried to connect the laptop directly to the modem and it wouldn't lease an IP to the laptop until I power-cycled the modem. When I reconnected the modem back to the router I once again had to power-cycle the cable modem in order for the router to be leased an IP even though the IP for the router was already in the modem's pool. At this point I'm fairly sure the problem is stemming from the cable modem.

    I've also tried setting the IP statically on the WRT54G but still have the same problem about once or twice a day.
  6. Slimey

    Slimey Network Guru Member

    its normal to have to power cycle the modem cause its not seeing the mac address of the Ethernet device that was connected before, try updating your routers firmware or using 3rd party firmware like tomato or dd-wrt?

    XSYLUS LI Guru Member

    I guess at this point my only option is to bypass the router and have a computer connected to the modem for about 12 hours. :sheesh:

    Are there any type of network logging programs that might be able to show me more detailed information about the network traffic to see if there's a pattern to this problem? I'd like to see if the issue is occurring at specific intervals after being power-cycled. I'd also like see if I can deduce what's causing it. Basically I want to pull back the curtain and look far behind the scenes.:guns:
  8. googlymoogly

    googlymoogly LI Guru Member

    Well not much help here but I just wanted to mention I had a motorola and a wrt54gv3 and my wrt54g with both default and dd-wrt firmware failed to even obtain a wan ip address from my motorola cable modem. I tried ordering a linksys cable modem... still nothing.

    I tested 4 different routers and only the netgear will grab a wan IP.

    I finally fixed the problem by just having a crappy old pIII 500Mhz computer with server 2003 w/2 nic's, then just used my router as a switch and wireless access point... been working great ever since.

    XSYLUS LI Guru Member

    Yea, mine obtains the wan IP once the modem is power-cycled but that's only needed when I disconnect the modem from the router. As a last resort, I am just going to put my own compilation of linux on the wrt54g and run a script that runs a ping test and automatically power-cycles the router for me when the connection starts degrading. Pity though, I expected more from a router that's tied with Cisco.
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