WCG200 constantly disconnects

Discussion in 'Other Linksys Equipment' started by omission, Jul 12, 2005.

  1. omission

    omission Network Guru Member

    My WCG200 disconnects for no reason anywhere from 6-12 times a day (and thats when I'm awake). I use Comcast and never had this problem before when I used their Motorola modem and my Linksys Wireless B router. The problem affect both my wireless computer and the hardwired one, so I know its the WCG200. Any ideas? When I talked to Linksys they told me to reset to my factory settings and that did nothing.
  2. hickinal

    hickinal Guest

    Try going in through the web interface and looking at the status of the connections. It is a page that has columns for mac address, ip address, duration, and expire time.

    If you're having the same problem I am then under duration any computer that is listed will be set to some value (1 hour in my case). This causes the connection to be reset every one hour. There is evidently no way to change it through the interface. I've spent two days with the tech support folks in India (jeez) and so far there best recommentation is to reinstall the firmware.

    I'm still trying to figure out how to do that since Linksys's own website does not allow you to download the firmware!

  3. sanxion

    sanxion Guest

    I assume that omission is talking about disconnection on the cable, or outside of things, while hickinal is talking about the inside.

    Hickinal, the expire time being set to reset 1 hour after the client machine in question has received a lease is normal behaviour for DHCP. The expire does not mean that a client connection is going to be reset at that time, it simply means that if that client is not still available at that moment the ip address leased to it will be reclaimed and returned to the pool of available leases. If you're client is still active its IP should not be reclaimed, rather the expire time will be updated to be another hour into the future.
    Do you actually see client machines lose their connection coinciding with that expiry time?

    Omission, I think I am having the same problem as you, I am also a Comcast customer, have been for almost 6 months. I bought a WCG200 when I got the connection, it worked fine until a couple of weeks ago when it started randomly disconnecting. Around the same time I noticed my TV reception start to get worse, analog channels got fuzzier, digital ones started to have more fractal artefacts, HD channels barely worked at all. Since then I have removed the coupler from the connection and now have the WCG connected directly on its own to the cable outlet. That improved things for a day or two, but in the past 24 hours it just doesn't want to stay connected for any great period of time at all. I am under the impression that in the last couple of weeks something has caused the quantity or quality of signal coming into my appartment to degrade. Maybe a different model of box would cope with this better, maybe not. I have the Comcast tech coming out in a few hours to check it out. Will update.
  4. groovykool

    groovykool Network Guru Member

    I have the same problem. I get at least 1-2 disconnects per hour. Is this confirmed problem? Is there an effective way to contact linksys about this?

    Can anyone recommend a utility for logging the disconnects or isolating the problem?

  5. romelfanger

    romelfanger Network Guru Member

    tcp connection timeout

    Yes, I have the same problem. It looks like the connection timeout is about
    5 minutes. I have contacted linksys support but they don't know about the
    problem and there is no way to set the timeout. Add on to that you can't
    upgrade the firmware to fix anything because its a cable modem... My guess
    is the connection is getting lost on the front end in either the cable modem
    or NAT software. Turning on and off the firewall seems to have no effect.

    Where I see isues are in the mail reader and ssh. For the mail reader I set
    the interval that it checks for new mail to less than 5 mintes. On the ssh
    side it was a little bit more complicated. If you have a ssh client that allows
    you to set the keepalive interval, you should be able to go that route. The
    ssh client I am currently using on Windows doesn't support it. On the server
    side I believe both OpenSSH and SSH from ssh.com support keepalive
    but don't support setting the interval. (I haven't tried Tectia server). For
    Linux you can change the system default keep alive time using:

    /sbin/sysctl -w net.ipv4.tcp_keepalive_time=240.

    I tried 300, but the timeouts still occured. The keep alive packet was sent just
    after 5 minutes and the connection was already gone at that point. I am
    currently using 4 mintues and it seems to the working so far. The time above
    is in seconds. You can use ndd on Solaris to change the setting there and
    the setting there looks like it is in msec. The default setting on both Solaris
    and Linux is 2 hours.
  6. romelfanger

    romelfanger Network Guru Member

    earlier question about tracking down tcp problems

    To answer the earlier question, I used tethereal on Linux to monitor the
    traffic and verify the interval that the keep alives were being sent by the server.
    On Solaris you could you snoop. In general I am not a Windows person
    other than that is what I have at home, so I am not much help with diagnosing
    the problem from Windows.
  7. groovykool

    groovykool Network Guru Member

    Here is my fix. Since Linksys has provided NO HELP.

    Go to Best Buy, purchase $30 NETGEAR wireless router.
    Disable wireless networking in WCG200.
    Connect Netgear router to WCG200.
    Setup Netgear router.

    With exactly the same settings as the WCG200, the Netgear router has had ZERO disconnects in the last week.

    WCG200 has buggy wireless code and Linksys is mute.

  8. markwal

    markwal Network Guru Member

    I spent the entire day on and off with their tech support they told me there will be no firmware update! I'm taking the modem back it's junk and telling everyone i know not to buy it.
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