AmesMUG: MacBook not seeing Ethernet

[John Rearick]

I assume you have the Ethernet port set to be configured  
automatically in the Network Prefs and you haven't done anything to  
change the way your network card works.

Have you tried booting from a different installation or re-installed  
OS X to see if it is a software problem?

Was the other computer you tried a Mac?  I know there have been some  
network equipment that just wont work on my PowerBook  but will work  
on other equipment (I've only encountered one situation like that).   
Try plugging a switch or hub between the wall outlet and your MacBook  
and see if that might solve the problem.

John

On Oct 12, 2006, at 3:56 AM, David Faden wrote:

> Hallo,
>
> I'm studying abroad this semester in Dortmund, Germany, and am having
> some trouble getting my MacBook to work with the Ethernet jack in my
> dorm room. In fact, even when the cable is plugged in between the
> computer and the jack, according to the Network panel, "The Ethernet
> cable is not plugged in." The jack is restricted to work with only one
> MAC address. However, I have confirmed with the system admin that the
> address they have for me matches the address listed in the Network
> panel.
>
> I am able to connect to Ethernet with my computer using the same cable
> in the library. (There however there are no restrictions on which
> addresses may connect.) So, the cable seems to be all right.
>
> We also used the same cable to successfully connect a different
> computer to the jack in my room. So, the jack is not dead.
>
> I also had trouble connecting my computer to a home LAN and to the
> campus network at the George Mason Uni campus but had no problems at
> ISU. The home LAN apparently had no restrictions on which MAC
> addresses could connect (but the owner is a little unsure about this).
>
> Any ideas on the source of the problem? The sys admin suggested that
> perhaps the MacBook is sending out packets with a different address
> than that listed in preferences, but I'm not sure how to snoop on this
> info. I haven't had much luck with my Internet searches.
>
> Thanks much. Tschuess!
>
> David
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