AirPort: self-assigned IP problems

Discussion in 'macOS' started by lenisik, Sep 14, 2010.

  1. lenisik macrumors newbie

    Jun 10, 2010
    Copenhagen, DK
    I would like to find a definitive solution to the following problem.

    My AirPort is regularly (and randomly) getting stuck, getting a self-assigned IP address and not being able to connect to the internet. The problem happens mostly, but not only, with my home connection. I run Mac OS X 10.5.8.

    I usually manage to fix it, using one of the following solutions, or all at the same time:
    - turn off and on AirPort in System Preferences > Network
    - remove the folder SystemConfiguration in /Library/Preferences/ and restart
    - resetting PRAM and NVRAM by restarting and holding down the keys cmd+opt+P+R (I am not sure this is useful, but seemed to work for me a few times)
    - resetting the wireless router

    Anyone out there who knows what the actual cause to this problem is? and if there exists a definitive fix to it?

    I would be most grateful
  2. MacForScience macrumors 6502


    Sep 7, 2010
    The only way I have found to fix this is to manually assign an IP address rather then having it auto setup using DHCP.

    Why it does this, I don't know for me it only happens on one computer and none of the others.

  3. lenisik thread starter macrumors newbie

    Jun 10, 2010
    Copenhagen, DK
  4. sneuppmann macrumors newbie

    Jul 12, 2011
    And how do I do to manually assign an Ip Adress? I can only connect one computer at once at home. Before was no problem to conect many at the same time but now if I have two computers on only one works.
  5. crypticlineage macrumors regular

    Jun 24, 2010
    You can assign a static ip address to your Airport card through the router settings.

    1. Type "ifconfig" in a terminal window to find alphanumeric mac address of the Airport card.

    2. Connect to the user interface page of your router (usually in a browser) and manually assign an available ip address as static address for this Airport card.

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