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Networking a 2 Wire 1000SW with a Linksys WRT54G router

Discussion in 'Networking Issues' started by slm2rw, Sep 6, 2005.

  1. slm2rw

    slm2rw Network Guru Member

    I have a problem I hope someone can help with. I am trying to set up a network for a friend to share an SBC Yahoo internet connection between 2 computers. The DSL modem is a Home Portal 1000 SW and the router is a Linksys WRT54G. Both computers are running Windows XP Home. The network is all wired, no wireless. I have gone through all the troubleshooting guides at the Linksys support page. When I hook the modem directly to the pc with an ethernet cable I am able to get on the internet. So in theory I should be able to change the router setting to PPoE and input the user ID and password, click the "connect on demand" tab, swith the cables around and I should have internet. I am doing all the proper power cycles but still no connection. The router setup utility keeps saying unable to connect to PPoE server. The only thing I can come up with is that the DSL modem has its own routing function built in and that the Linksys router and the modem are clashing. However I have called SBC and they ran me through the steps to disable the router function on the modem. Ive done this with still no results.

    On my home system I have a BEFSR41 with a Speedstream 5100 modem with the same ISP. I remember when I set it up that I had a similar problem with the modem acting as a router but I was able to fix it but I dont remember how. I havent had to set it up for a couple of years.

    I know its something stupid that I am forgetting but if someone could help me I would surly appreciate it because I am stumped. If you need anymore system info please let me know.

    Thank you in advance for an thought you might be able to throw in.

    slm2rw
     
  2. 4Access

    4Access Network Guru Member

    When the computer is connected directly to the modem do you have to enter a username & password on the computer to get online? When the computer is successfully connected to the internet directly connected to the modem what is the output of the ipconfig command?
     
  3. slm2rw

    slm2rw Network Guru Member

    When I hook directly to the modem it does not require a user id and password because the modem stores that info. When I go to ipconfig it displays the ip address for the modem in the 172.16 range.
     
  4. 4Access

    4Access Network Guru Member

    It sound like the modem is still handling the PPPoE which is why you're getting errors whenever you try and get the router to connect using PPPoE. The quickest solution would be to simply configure the router to lease a DHCP address (no PPPoE) for the internet port but then your clients will be double NAT'd which you don't want.

    Keep working on the modem config. You'll be able to tell that you've got the modem configured properly when you connect your PC to the modem directly and one of the following happens:

    1. You are forced to do the PPPoE authentication on the PC before you can get online. (Modem is in full-bridge mode in this case. Configure the router to handle the PPPoE.)

    2. The PC gets a non private IP address without having to do any of the PPPoE authentication on the PC. (Modem is in half-bridge mode in this case. Simply configure the router to lease an address for the internet port. No PPPoE necessary on the router.)

    A non-private IP address is any IP address not in the following ranges: 192.168.X.X, 172.16.X.X, 10.X.X.X

    Good luck.
     

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