Bob Gold

Q: Ethernet Connect Problem

I normally have an ethernet cable connecting my Time Capsule to my iMac... I've got a Netgear Router connected to my Time Capsule, and the Time Capsule is in the Bridge Mode.

 

Out of the blue, I am getting a "Ethernet has a self-assigned IP Address and will not be able to connect to the internet," message on Network Preferences, with the ethernet cable attached to my iMac.

 

I am able to connect the ethernet cable, normally attached to the iMac, to a MacBook Pro, and the connection there is perfect (so the cable is good).

 

Also, if I connect the ethernet cable to a Thunderbolt adapter, and connect it to my iMac, the connection is ok.

 

I've restarted the iMac, and reset the ethernet cable a few times, with no success... Not sure if there is a preference file that I ought to delete (or which one).  Did a repair permissions, with no change in behavior.

 

WiFi on the iMac works ok...

 

Thanks for any thoughts out there...

 

Bob

iMac, OS X Yosemite (10.10.5), Mac Plus, MacBook Pro

Posted on May 17, 2016 1:07 PM

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Q: Ethernet Connect Problem

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  • by Bob Gold,

    Bob Gold Bob Gold May 17, 2016 10:16 PM in response to Bob Gold
    Level 4 (1,378 points)
    Mac OS X
    May 17, 2016 10:16 PM in response to Bob Gold

    Update:  The computer seems unable to configure IPv4 using DHCP.

     

    When I configure IPv4 Manually, I am able to get the ethernet port to work properly...

     

    Thoughts???

     

    Bob

  • by Bob Gold,Solvedanswer

    Bob Gold Bob Gold May 17, 2016 11:27 PM in response to Bob Gold
    Level 4 (1,378 points)
    Mac OS X
    May 17, 2016 11:27 PM in response to Bob Gold

    Final update...

     

    Seems that my Netgear router, for some unknown reason, began to have a conflict with my iMac's IP address...

     

    Reset the Netgear router, and all's well with the internet-world...

     

    Now, if I could just figure out what caused the problem in the first place... Oh well...bedtime...

     

    Bob