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Resolved Two computers with same IP address

Discussion in 'Networking (Hardware & Software)' started by Geoff Hands, 2011/08/18.

  1. 2011/08/18
    Geoff Hands Lifetime Subscription

    Geoff Hands Well-Known Member Thread Starter

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    After making some changes in moving thiungs around ( repositioning the router and perhaps connecting to a different port or something ? ) I get a message appearing on my lap-top (Vista) that two computers on this network have the same IP address. The other seems likely to be my wife's laptop (XP) rather than my PC (Windows7) in view of the timing of that message in relation to which machines were switched on at the time.
    How can I change the IP address, or better , perhaps check what it is on each of the three machines on the network ,first of all ?
     
    Geoff Hands,
    #1
  2. 2011/08/18
    wildfire

    wildfire Getting Old

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    Probably best asked in the networking forum, in the mean time either set up each (and every) system to obtain an IP address automatically (from the router) or give them individual IP addresses.
     
    wildfire,
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  4. 2011/08/18
    Admin.

    Admin. Administrator Administrator Staff

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    Moved to Networking.
     
    Admin.,
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  5. 2011/08/18
    rsinfo

    rsinfo SuperGeek Alumni

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    Are you sure you have not made any changes in router and/or computers besides repositioning it ?
     
    rsinfo,
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  6. 2011/08/19
    Geoff Hands Lifetime Subscription

    Geoff Hands Well-Known Member Thread Starter

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    I am sure ; the changes I made were 2;-
    1) my e-mail system kept asking foir a password, and I played about with other e-mail systems - briefly , and tried adding a new account with the known right passowrd etc ; evntgually solved this by going back to ISP and resetting password there . Still the same password, but end of problems.
    2) I moved the router to a higher position to get a better signal (wireless) in other rooms.

    Can'r see that these could have caused the problem.
     
    Geoff Hands,
    #5
  7. 2011/08/19
    Geoff Hands Lifetime Subscription

    Geoff Hands Well-Known Member Thread Starter

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    I don't know how to do either of these things ?
     
    Geoff Hands,
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  8. 2011/08/19
    rsinfo

    rsinfo SuperGeek Alumni

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    rsinfo,
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  9. 2011/08/19
    TonyT

    TonyT SuperGeek Staff

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    Shut down all computers.
    Turn on one, wait until completely booted and an IP address is assigned.
    Repeat for other comps.

    You likely didn't shut down the comps when rearranging things, you maybe just unplugged cables. And the router assigned an address that it thought was free.

    Start the comps one at a time.
     
    TonyT,
    #8
  10. 2011/08/19
    Geoff Hands Lifetime Subscription

    Geoff Hands Well-Known Member Thread Starter

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    Thanks for that, I'll do it shortly.
     
    Geoff Hands,
    #9
  11. 2011/08/20
    ReggieB

    ReggieB Inactive Alumni

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    You can also try running ipconfig /renew on each of the PCs. That will force them to renegotiate their IP addresses with the router.
     
    ReggieB,
    #10
  12. 2011/08/21
    Geoff Hands Lifetime Subscription

    Geoff Hands Well-Known Member Thread Starter

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    Yes that did the trick. Thanks.
     
    Geoff Hands,
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