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Linksys WRT54G Router Dropping Internet Connection to Wired Desktops

Discussion in 'Networking Issues' started by pradeep1, Jun 26, 2007.

  1. pradeep1

    pradeep1 LI Guru Member

    I installed a WRT54G v1.1 with DD-WRT on my network, and I've got 2 desktops hooked up to it directly wired and another laptop through wireless.

    Every so often, I've noticed that the wired connections will lose access to the internet.

    Here is what happened yesterday and again today morning:

    1. All connections were fine (wired and wireless) all day Sunday and Monday.

    2. Wired desktops both lose connectivity to the Internet. LAN over NetBEUI still works fine and wireless connectivity to laptop is fine.

    3. Pinged, localhost works okay from both computers

    4. Pinged no response

    5. Pinged default gateway, etc., no response

    6. Pinged www.google.com, no response

    7. My IP address after losing internet is still the same as before I lost connectivity.

    8. Simple reboot of wired desktops brings everything back to normal until the next time.

    Any thoughts? Do I have a bum router?

    One thought, the wireless laptop is Vista and the wired desktops are XP. The laptop drops connectivity when it goes into sleep mode, and it has to be disconnected and reconnected each time it comes out of sleep mode. Could this be causing the entire network to have problems?


  2. frenchy2k1

    frenchy2k1 LI Guru Member

    seems you have a DHCP problem.
    how are the wired computers configured? Static IP? Dynamic with DHCP?
    It seems your DHCP session expires (thus losing DNS info and maybe even network info) and is not renewed.

    It may also just be that your connection table is full and you need a reboot on the router to reset it. Do you use bittorent a lot on the wired computers?
  3. Toxic

    Toxic Administrator Staff Member

    what is your DHCP Lease time set too? do you have a static or dynamic IP address from your ISP?
  4. pradeep1

    pradeep1 LI Guru Member

    Thank you for your responses. I've posted this same question on three different forums and you guys are the only ones to reply back with a suggestion other than rebooting the router.

    The DHCP is autoconfigured. I have Comcast cable modem service. I am not sure if I have static or dynamic IP addresses. I reflashed my firmware to what Linksys has (version 4.21.1), so I've lost a lot of the config. I could see in DD-WRT.

    I don't know how to find the DNS lease time. I remember in DD-WRT, it was 1440 minutes (24 hours), but I am not sure with the Linksys firmware.

    frenchy2k1, I did have to reboot my router once. I don't use any P2P software. Most of the time when my wired connections drop off, I just have to reboot the machines to get everything going again. ipconfig /release/renew doesn't seem to work.
  5. pradeep1

    pradeep1 LI Guru Member

    Once I reflashed my router with the firmware provided by Linksys, it has been stable and has not yet dropped either the wired or wireless connections. Crossing my fingers that this keeps up.

    Thank you both for your advice and expertise. If it acts up again, I'll repost here, or PM you guys.

  6. smusser

    smusser LI Guru Member

    Hopefully you guys can help me as well.

    I have an issue where randomly the router "seems" to lockup. most times it comes back online within 60 seconds or so. Once in a while I have to power cycle it. During the "locked up" period, all PC's show connected to our network. This can sometimes not happen for an entire day, othertimes it can occur every ten minutes. There is no set pattern as to it happening when certain PC's or gaming consoles are on.

    Everything worked fine up until a couple of months ago when the lockups started. The WRT54G we had then was a few years old so I upgraded the firmware, did all the normal troubleshooting and came up with nothing. Thought the router might be crapping out so I purchased the current WRT54GS and am still experiencing the same issues. Any thoughts on what might be causing the issue?

    Here is the current network topography and configuration;
    Bellsouth DSL w/ Westell modem upgraded to latest firmware from Bellsouth
    Linksys WRT54GS w/v7.50.2 firmware
    Zonet 8 port Ethernet Switch
    Windows XP Pro Desktop - static IP (wired)
    Windows XP Pro Desktop - DHCP assigned (wired)
    Windows XP Pro Desktop - DHCP assigned (wired)
    Windows XP Pro Desktop - DHCP assigned (wireless)
    Windows XP Pro Desktop - DHCP assigned (wireless)
    Brother HL2070N Printer - static IP (wired)
    Wii - DHCP assigned (wireless)
    PS3 - - DHCP assigned (wireless)
    PPPoE, Keep Alive: Redial Period - 20sec., DHCP lease time - 0 (24 hours), mixed network mode for wireless, SSID broadcast enabled, WPA Personal w/TKIP, QoS disabled, DNZ disabled, a number of ports forwarded for WOW, NHL07 and the PS3


    update - I have set all devices on our network with staic IP's. This seems to have made a big difference. In the last 72 hours we have only had to reset the router once. I will follow up later this week with another update.
  7. smusser

    smusser LI Guru Member

    follow up to:Hopefully you guys can help me as well.

    I am beginning to believe the issue lays with Bellsouth and their Westell modem. Connection can go the entire day without freezing and then (mostly in the evenings) it will lock every 15-20 minutes. Then again tonight there have not been any issues. Personally I think the entire problem started when AT&T bought Bellsouth and started moving network resources around.

  8. ftoniolo

    ftoniolo LI Guru Member

    WRTP54G-NA Freezing

    Hi, guys! I'm having issues with my WRTP54G-NA...
    It's freezing. I've tryed the Linksys support from Brazil, but they can't help me.
    They told me to update the firmware to the 3.1.24 version.
    I've updated, but the behavior remains the same.
    The difference is: now the power LED becomes red when the router freezes.
    I bought 12 routers.... 3 of them freezed at now...
    Someone help me! :)

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