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    problems with crossover cable and 1000mbit connection

    Discussion in 'Networking and Wireless' started by acgraham, Dec 10, 2007.

  1. acgraham

    acgraham Notebook Enthusiast

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    hey guys. im having trouble networking my machines.

    I have my main machine connected to a 100mbit router. it has a second network card which i want to use a crossover cable to connect to my backup computer. i want to use a crossover cable so i can connect these at a 1000mbit connection speed, so i cant just bridge the connections, or the speed gets limited to 100mbit.

    however, when i try to connect these two machines with a crossover cable, "i get limited or no connectivity"

    does anyone know how i can work around this?
    thanks for any help!
     
    acgraham, Dec 10, 2007
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  2. txqzr4

    txqzr4 Notebook Consultant

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    EDIT: NM, I didn't read your post closely enough -- you are getting a physical connection. IP, touche.

    A standard Ethernet crossover will not work because GigE requires all 4 pairs of wires, while Ethernet requires only 2. You will need to purchase or create a GigE cross-over cable:

    Pin Connector #1
    1 white/orange
    2 orange
    3 white/green
    4 blue
    5 white/blue
    6 green
    7 white/brown
    8 brown

    Pin Connector #2
    1 white/green
    2 green
    3 white/orange
    4 white/brown
    5 brown
    6 orange
    7 blue
    8 white/blue
     
    txqzr4, Dec 10, 2007
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  3. tumnasgt

    tumnasgt Notebook Evangelist

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    You need to set a fixed IP address. If you aren't sure how to do this, just say what the OSs are on the PCs you are trying to connect.
     
    tumnasgt, Dec 11, 2007
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  4. andyasselin

    andyasselin Notebook Deity

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    any cat 5e rate cable shound be good

    you sure both you laptop have giga-byte lan?
     
    andyasselin, Dec 11, 2007
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  5. acgraham

    acgraham Notebook Enthusiast

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    thanks for the help guys. yes they both have gigabit lan. im using windows xp.
     
    acgraham, Dec 11, 2007
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  6. tumnasgt

    tumnasgt Notebook Evangelist

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    The way I remember setting fixed IPs (haven't used an XP machine for a while now), is by:

    *Right click on 'My Network Places' and opening properties (opens list of connections)
    *Opening the Properties of the network connection
    *Going to the properties of TCP/IP
    *Entering an IP address such as 192.168.1.x

    Once this is entered on both of the PCs (remember that the last number must be different on each PC, and the first three the same), the network should go fine.

    Hope this helps

    PS. I hope I didn't over simplify the instructions, I just don't know how familiar you are with networking.
     
    tumnasgt, Dec 11, 2007
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  7. acgraham

    acgraham Notebook Enthusiast

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    thats ok. well i've tried to do that, but as soon as i do the network connection drops out to my router.

    on network card a i hace dhcp and the followring settings are aquired-
    ip 192.168.0.134
    subnet 255.255.255.0
    default gateway 192.168.0.1

    on the other network card (which connects with the crossover cable) i have an alternate manual config set to this-
    ip 192.168.0.135
    subnet 255.255.255.0
    gateway 192.168.0.2
     
    acgraham, Dec 11, 2007
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  8. blue68f100

    blue68f100 Notebook Virtuoso

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    GigE does not require a crossover cable. So gige to gige std cable, it's partof the gige spec. It will auto config. 100/10BaseT does.

    Connect to the router 1st. Then set the wired port to bridge. Then make the connection.
     
    blue68f100, Dec 11, 2007
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  9. txqzr4

    txqzr4 Notebook Consultant

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    It's not at all part of the "spec", its just that many devices do that.
     
    txqzr4, Dec 11, 2007
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  10. acgraham

    acgraham Notebook Enthusiast

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    sorry blue68f100, but i dont quite follow you. i can't just bridge the two network cards because when i do that the speed goes down to 100mb/s.
     
    acgraham, Dec 11, 2007
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  11. txqzr4

    txqzr4 Notebook Consultant

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    This doesn't work because you have two paths to the 192.168.0.x network on the first computer . . . what you will probably need to do is set the 2nd card to a different network like 192.168.1.x and setup Internet Connection Sharing. Set the other computer to DHCP. The double NAT shouldn't be a problem.
     
    txqzr4, Dec 11, 2007
    #11