Why does an inactive ethernet connection have inet IP address

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hunter1998 Author

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Why does an inactive ethernet connection have inet IP address

Hi everyone,

I has a strange issue with the network.My current system is snow leopard. Please take a look at the screen-shot:

http://img204.imageshack.us/i/screenshotts.jpg/

In the screen-shot you can see that the en0(Ethernet) is inactive but it has inet IP address 192.168.2.1 (the same as the router IP).

The computer is currently using airport connection en1: inet IP 192.168.2.6

Why does this thing happen? How can i fix it (mean no inet IP for the Ethernet). Thank a tons.

MBP 2010, Mac OS X (10.6.5)

Posted on Feb 16, 2011 6:14 AM

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Answer 1

Linc Davis

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209,547 points

Feb 16, 2011 6:49 AM in response to hunter1998

What do you have in the Network preferences for that interface?

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Answer 2

hunter1998 Author

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Feb 16, 2011 7:12 AM in response to Linc Davis

I uploaded the screen-shot for you. Thank

http://img696.imageshack.us/i/screenshot2gk.jpg/

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Answer 3

Linc Davis

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209,547 points

Feb 16, 2011 7:28 AM in response to hunter1998

In the Advanced > TCP/IP pane, no address should be showing. If that's the case, try changing any of the settings for the interface, then change it back and save. That may force an update of the buffer that ifconfig is reading from. If not, you could try this:

sudo ifconfig en0 inet 192.168.2.6 delete

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Answer 4

hunter1998 Author

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Feb 16, 2011 8:07 AM in response to Linc Davis

In the Advanced > TCP/IP pane, there's no address showing there. For your line:

sudo ifconfig en0 inet 192.168.2.6 delete

Why should i delete the airport IP(192.168.2.6) not the Ethernet IP (192.168.2.1)?

Message was edited by: hunter1998

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Answer 5

Linc Davis

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209,547 points

Feb 16, 2011 11:51 AM in response to hunter1998

Correction:

sudo ifconfig en0 inet 192.168.2.1 delete

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Answer 6

hunter1998 Author

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Feb 17, 2011 2:37 PM in response to Linc Davis

Hi, the command line works but temporary. When i turn off or restart the computer, the Ethernet reappears the inet IP again.

Message was edited by: hunter1998

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Answer 7

Linc Davis

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209,547 points

Feb 17, 2011 2:50 PM in response to hunter1998

Beats me, but as long as everything is working, I wouldn't worry about it.

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Answer 8

hunter1998 Author

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Feb 17, 2011 3:29 PM in response to Linc Davis

The computer can connect internet. But this mystery inet IP stop me using an application which require an IP to run BUT instead get the airport inet address it get the first one the Ethernet inet address. That why i want to fix this thing.

Thank you, Davis for help, I'm really appreciate.

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Answer 9

Linc Davis

Level 10

209,547 points

Feb 17, 2011 3:56 PM in response to hunter1998

What application is that?

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Answer 10

Uplink24

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Oct 4, 2012 3:13 PM in response to hunter1998

Not to bring up an old topic, but I have this same exact issue. I have not been able to find an answer anywhere searching constantly the past few days! And it's not the easiest thing to search for in Google. I am also on snow leopard and I think it's my ethernet too causing problems. It's says it's disconnected and I have even tried turning the ethernet off and deleteing it from the Network settings. I know it's not with the airport because I can turn the airport off and this 192.168.2.1 still shows up in Terminal when I run the ifconfig command. The weird thing is this is the ONLY place it lists that. I have no problems with internet, but when I am trying to play Minecraft with some other people on LAN and I can connect to their servers and play, but they can't join mine because for some reason the game (and I can't change this) uses that 192.168.2.1 as the server instead of the 172.27.35.17 that my computer is set up as the LAN IP. All the other computers are working just fine though. So I don't understand where this 192 IP is coming from and why it won't go away. Are there any permanent fixes for this? I'm on Snow Leopard on my Macbook Pro, and everything is up to date.

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