rahotz

Q: Ethernet quit working after Yosemite upgrade

After upgrading to Yosemite, my ethernet word connection quit working.  Error says "Either the cable for Ethernet is not plugged in or the device at the other end is not responding."  This happened once before after one of the dot updates to Mavericks.  A subsequent update caused it to start working again.  Any ideas?

iMac, OS X Yosemite (10.10)

Posted on Oct 17, 2014 6:14 PM

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Q: Ethernet quit working after Yosemite upgrade

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  • by William Paplham,

    William Paplham William Paplham Oct 27, 2014 5:47 PM in response to rahotz
    Level 1 (25 points)
    Oct 27, 2014 5:47 PM in response to rahotz

    I've have internet issues, but it works for extended periods, then rapidly drops and regains internet. When it happens it's about 1x/sec, repeated fro extended periods. Main reason I noticed is hardware growler.

     

    This is two repeats, but I've come back to the computer I can have over 1000 messages. At 5 messages or so per incident that's a 100+ cycles at time.

     

    10/26/14 1:24:38.801 PM configd[26]: LINKLOCAL en1: parent has no IP

    10/26/14 1:24:38.815 PM configd[26]: network changed: v4(en1-:10.0.1.101) DNS- Proxy-

    10/26/14 1:24:41.710 PM configd[26]: network changed: v4(en1+:10.0.1.101) DNS+ Proxy+ SMB

    10/26/14 1:25:42.041 PM discoveryd[3095]: Basic Bonjour,Warn Warning: IPv4 listener multicast send failed en1, 50

    10/26/14 1:25:42.041 PM discoveryd[3095]: Basic Bonjour,Warn Warning: IPv6 listener multicast send failed en1, 50

    10/26/14 1:25:43.000 PM kernel[0]: Ethernet [Intel8254x]: Link up on en1, 1-Gigabit, Full-duplex, Symmetric flow-control, Debug [792d,af08,0de1,0e00,c5e1,3800]

    10/26/14 1:25:43.595 PM configd[26]: LINKLOCAL en1: parent has no IP

    10/26/14 1:25:43.608 PM configd[26]: network changed: v4(en1-:10.0.1.101) DNS- Proxy-

    10/26/14 1:25:46.364 PM configd[26]: network changed: v4(en1+:10.0.1.101) DNS+ Proxy+ SMB

    10/26/14 1:26:41.659 PM discoveryd[3095]: Basic Bonjour,Warn Warning: IPv4 listener multicast send failed en1, 50

    10/26/14 1:26:41.660 PM discoveryd[3095]: Basic Bonjour,Warn Warning: IPv6 listener multicast send failed en1, 50

    10/26/14 1:26:46.228 PM discoveryd[3095]: Basic Bonjour,Warn Warning: IPv4 listener multicast send failed en1, 50

    10/26/14 1:26:46.228 PM discoveryd[3095]: Basic Bonjour,Warn Warning: IPv6 listener multicast send failed en1, 50

    10/26/14 1:26:47.000 PM kernel[0]: Ethernet [Intel8254x]: Link up on en1, 1-Gigabit, Full-duplex, Symmetric flow-control, Debug [792d,af48,0de1,0e00,c5e1,3800]

     

    This typically happens when I'm not at the computer. The few times I've seen it in Airport utility it looks like a failure between my airport router and the cable modem. But 3 other computers, all Mavericks and WIFI don't seem to be affected other than slow internet.

     

    Other observations. Noticed it was assigning a new IPv6 address each time. I looked at my settings and I didn't have IPv6 configured. Tests on IPv6 websites confirmed IPv6 wasn't configured correctly. I did set IPv6 set up and was able to connect to the test sites correctly. Didn't seem to make a different. Disabled again.

     

    I do run Little Snitch. Turned that off and on again. Didn't seem to fix (or cause when turned back on).

     

    I also use a VPN. Again, turning off didn't seem to affect issues.

     

    Right now it hasn't repeated for over 24 hours. Crossing fingers.

  • by JPieters,

    JPieters JPieters Nov 1, 2014 9:15 AM in response to alxmo
    Level 1 (0 points)
    Nov 1, 2014 9:15 AM in response to alxmo

    Your solution worked for me Alxmo - thank you!!!

     

    1. Open Network Preferences
    2. In the Locations drop down box, select "Edit Locations..."

    3. Create a new location

    4. Remove the ethernet device, click apply

    - note, the first time I tried this it didn't work, I think I missed clicking apply

    5. Add a new ethernet device, click apply

    Wait. it's takes a second or two, but you should get a message that the cable is connected, and second or two later an IP address.

  • by DeZincVolt,

    DeZincVolt DeZincVolt Nov 10, 2014 10:23 AM in response to h11mm1ch43l
    Level 1 (0 points)
    Nov 10, 2014 10:23 AM in response to h11mm1ch43l

    Hello,

     

    I can hardly believe it but solutions worked out!

    I had to use another name (ethernet 2 i/o ethernet) and it simply connected.

     

    Thanks a ton, I've been spending hours restarting my network over and over again for no result.

     

    B.

  • by Roy Hall,

    Roy Hall Roy Hall Dec 6, 2014 3:05 PM in response to DeZincVolt
    Level 1 (5 points)
    iPhone
    Dec 6, 2014 3:05 PM in response to DeZincVolt

    Late 2012 Mini - upgraded to Yosemite - and no ethernet connection.

    I have tried all solutions on the thread - still looking for a cable connection.

    Any other ideas?

     

    Thanks

    Roy

  • by danfin,

    danfin danfin Dec 19, 2014 12:56 PM in response to MacRainer
    Level 1 (0 points)
    Dec 19, 2014 12:56 PM in response to MacRainer

    Same iMac same problem. One exception -- ethernet works with Firefox, and does NOT work with Safari, iTunes, or anything Apple created.

  • by pfpalmer,

    pfpalmer pfpalmer Feb 26, 2016 11:10 AM in response to alxmo
    Level 1 (0 points)
    Feb 26, 2016 11:10 AM in response to alxmo

    This worked for me

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