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Thread: Ethernet: Does not have a valid IP configuration

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    Ethernet: Does not have a valid IP configuration

    Hello,

    I recently built my computer and I have just bought an ethernet cable (Cat5e), however, the cable does not work. I have tried it on both my new desktop and my laptop. I am unsure of what to do... I read in another thread to go onto my ipconfig, so here is what it says:

    Connection-specific DNS suffix
    Link local IPv6 Address : fe80::f123:bd96:c4d2:2af1%11
    Autoconfiguration IPv4 Address: 169.254.42.241
    Subnet Mask: 255.255.0.0
    Default Gateway:

    Thanks

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    Re: Ethernet: Does not have a valid IP configuration

    If the cable isn't working then get another one. This seems to be the case if it doesn't work with two computers. The IP address assigned is a default. You are connecting your computer to a router with DHCP enabled?
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    The late but legendary peterb - Onward and Upward peterb's Avatar
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    Re: Ethernet: Does not have a valid IP configuration

    As Bluecube says...

    But what are you trying to do? If it is to connect two computers directly, you need a crossover cable, and the self assigned IP addresses in the 169.254 range will work.

    Normally you connect to the internet via a router, which will assign an IP address (usually in the 192.168 range) and the adres of the gateway (the router itself) to the host computer (the one you are connecting).
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    Re: Ethernet: Does not have a valid IP configuration

    Sorry I guess I wasn't clear. I'm not actually sure if its the cable that doesn't work. Also, when I said I tried the cable on both computers, I meant that I tried connecting both of my computers to the ethernet port with the same cable, but different times.

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    Re: Ethernet: Does not have a valid IP configuration

    What do you mean 'Ethernet port'? You mean a router? You've plugged the cable in the computer and then put it into a router?
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    Re: Ethernet: Does not have a valid IP configuration

    Sorry to be a pedant PeterB, but actually the RFC for GigE states that you don't need to worry about crossover or not, the chipset auto-negotiates that stuff for you now, and it's unlikely a new PC will only have 10/100Mbit.

    169.x.x.x on a MS OS, tends to mean that it's a failed DHCP request. I personally think the cable is duff. Have a look at the socket on the back of the PC. You should see flashing green/orange lights. If not, it's almost certainly a busted cable.

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