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Linking Cisco 2811 to Cisco 1841 via fe 0/0

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  • Linking Cisco 2811 to Cisco 1841 via fe 0/0

    Hi to all. I am new to Cisco routers and just managed to find this forum. I have two Cisco routers that I have to connect together. I am using the SDM web interface.

    The 1841 is connected to the web and the port 0/0 is configured as IP 13.195.88.1 mask of 255.255.252.0

    I have a 2811 - port fe 0/1 is configured for traffic for 10.1.3.0 internal lan mask of 255.255.255.0. My gateway is 10.1.3.1 on another server.

    I would like to connect port fe 0/0 of the 2811 to port 0/0 of the 1841. I configured the 2811 as ip 13.195.88.2 and nothing else. I connected the two routers with a crossover cable. I tried to set a nat for all 10 traffic to be translated to the 13.195.88.2 but not working. I tried to do a route too but nothing. I am not sure what to do.

    Can someone please guide me and tell me what i have done wrong as I cant get the two routers connected to talk to each another and then out to the internet.

    many thanks

  • #2
    Re: Linking Cisco 2811 to Cisco 1841 via fe 0/0

    HI fitzwater,

    So, when you connect the two with the crossover cable and do a no shutdown on the ethernet ports, do the ports come up?

    Do you get UP & UP on the show ip interface brief on both routers?

    If so, can you ping the 13.195.88.1 & 13.195.88.2 on both routers?

    ping 13.195.88.1
    ping 13.195.88.2

    That is where I would start. Don't worry about NAT or anything else at this point until you can get UP/UP and ping each side.

    If that doesn't work, put a switch between them. Maybe the cross over is no good.

    Let us know how it goes.

    Thanks,
    David Davis - Petri Forums Moderator & Video Training Author
    Train Signal - The Global Leader in IT Video Training
    TrainSignalTraining.com - Free IT Training Products
    Personal Websites: HappyRouter.com & VMwareVideos.com

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    • #3
      Re: Linking Cisco 2811 to Cisco 1841 via fe 0/0

      You shouldn't have NAT. Make sure you have a link light, and that the interfaces are up (if you do a sh int fa0 and sh int fa0/0 on the 1800 and 2800 respectively, the first couple lines should incldue the word up twice).

      If you ping do you get dots (.), or something else?
      Thanks,
      Brian Desmond
      Microsoft MVP - Directory Services
      www.briandesmond.com

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