WRT54g doesn't link with Comcast cable

Discussion in 'Cisco/Linksys Wireless Routers' started by jterp7, Jun 10, 2005.

  1. jterp7

    jterp7 Network Guru Member

    I tried for 3hrs, unsuccesfully yesterday to switch from a plain old linksys etherfast wired router to this new wrt54g. For some reason it just never linked the internet through. I even tried linksys' tech support and got nothing. The host computer is using windows 2k. Any ideas ppl?
  2. swinn

    swinn Network Guru Member

    Well usually it just requires you to unplug the router and cable modem. Plug in the router first, then plug in the cable modem. You might try to clone the MAC address of your old router and see if that works.
  3. jterp7

    jterp7 Network Guru Member

    hmm...thats what linksys tech support said, and thats what i did in the first 5mins anyway, way before i even chatted with them, is that really the best this forum can do?
  4. AbNormal

    AbNormal Network Guru Member

    Perhaps given the very limited information you originally posted, ...yes.

    I apologize for appearing blunt, but you didn't mention what specific steps you took to resolve your problem; like cloning your MAC address, rebooting, etc. Had this been stated, I'm sure it would have been taken into account.

    Second, you didn't indicate which version of WRT54G you bought. All we know is that you have cable internet, but what make/model of modem? Some of the new DOCSIS modems are becoming very particular about what or who connects up to them. We would also have to assume that you haven't updated or re-flashed the factory firmware in any way, as this would prompt an appropriately different response entirely.

    I hope you can appreciate those that want to help, are truly grasping at straws. Please don't jump on someone for trying to help. We are just a users, trying to help other users, and share our experience.
  5. jterp7

    jterp7 Network Guru Member

    heh, i apologize to the first guy about my impatience, but as many of you know wifi can be very frustrating -_-

    ok well so far i cloned the MAC account, rebooted all that good stuff, even went to try manually putting in dns addresses and what not. Oh its a v3.0 also.

    Anyone and i mean ANYONE who has comcast cable + wireless router, please any help is appreciated. Thanks
  6. jagboy

    jagboy Network Guru Member

    dd-wrt has a fix to this as soon as i get more info i will post it
  7. jagboy

    jagboy Network Guru Member

    here is the screen shot of the dd-wrt STP feature. when enabled it help the router conect to comcast. it can be found in pre 4 . you can go get the firmware @ http://www.dd-wrt.com

  8. jterp7

    jterp7 Network Guru Member

    thanks man 8)
  9. jagboy

    jagboy Network Guru Member

    no problem
  10. jagboy

    jagboy Network Guru Member

    wait when using stp (Spanning Tree Protocol) make usre to disable it if you're using Comcast
  11. jterp7

    jterp7 Network Guru Member

    man i updated firmware and disabled STP....but still nothing -_-

    is there anything else i need to change specifically for comcast besides stp?
  12. jagboy

    jagboy Network Guru Member

    did u reboot the modem and the router.
  13. jterp7

    jterp7 Network Guru Member

    yeah i did that, is there something else im forgetting?
  14. jagboy

    jagboy Network Guru Member

    maybe it is time to call comcast if you already have not
  15. jterp7

    jterp7 Network Guru Member

    common sense says to but i clearly remember my last experience on internet chat where they said

    "we do not support customer bought routers"

  16. jagboy

    jagboy Network Guru Member

    or you could do this

    internet------(ethernet)-----router1(use a compatable router that can get a ip address form comcast)-----(ethernet)--WRT
  17. slurppie

    slurppie Guest

    I don't know if this will help in your quest but several of the CM's that CCAST uses will cache the MAC addy of the device behind it. If you've performed all the steps that the previous members have suggested then I would look for a reset button on your CM and hold it down for 30 sec's. This will typically clear the cache out.
  18. jterp7

    jterp7 Network Guru Member

    initially i wanted to just connect ethernet to wrt54g to get the internet through, but how is the setup for that? do you get the ip from the ethernet and use that?

    slurpie- thanks, ill try that when i get home from work today
  19. jagboy

    jagboy Network Guru Member

  20. jterp7

    jterp7 Network Guru Member

    so after a flury of thunderstorms and the such recently, ccast has issues and router resets, in addition it is not at the default, i upgraded to pre4 just before. Does anyone know if the default ip of the router changes to something other than the number aforementioned when reset?
  21. logen21

    logen21 Guest


    I have COMCAST w/RCA Modem and WRT54G v3.0 updated to official firmware v4 now (Internet always worked since I got router). DO SETUP WITHOUT MODEM CONNECTED FIRST...Router Setup is...use Ethernet connection to PC to setup... ANY SETTINGS NOT LISTED ARE NOT NECESSARY or BLANK! SAVE SETTINGS AFTER EACH SETTING PAGE CHANGE... BASIC SETUP: Automatic config - DHCP, no host, no domain, Auto MTU, whatever you want as local IP for ROUTER(not comcast's IP, they set that), DDNS: DDNS disable, MAC Address Clone: Enable Mac Address Clone, Advanced Routing: GATEWAY with no extra settings, forget wireless till you get this working, Security Firewall: all enabled except Internet NAT redirect, VPN: all enabled, Acces Restriction: Disabled, App and Gaming: all disable or no setting, Administration: HTTP checked, Remote Management disabled, UPnP Enabled...SAVE and exit ... then UNPLUG both Modem and Router, reconnect modem first and wait till Cable Link and Internet lights are steady and the other two should be blinking, then reconnect Router afterward and it should have blinking Internet light. IF THESE LIGHTS SHOW THEN ROUTER READS MODEM and INTERNET. GO BACK and CHECK ROUTER SETTINGS and view STATUS PAGE, Mac Address should be filled out, WRT54G router name, NO HOST, Domain Name should have something with "comcast.net" or similar, Login Type: automatic - DHCP, IP address and Subnet should be filled out also and I think the rest should also be filled out.... If YOUR PC can't connect to Internet it usually a PC setting(maybe Windows firewall or other LAN setting, that's another story) ALL LAN SETTINGS FOR WINDOWS ARE SET TO AUTOMATIC AND SHOULD HAVE DHCP ENABLED!!
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice