[wellylug] Dummy ethernet crossover?

[Richard Hector]

On Tue, Sep 28, 2004 at 05:07:20PM +1200, Edmund A. Hintz wrote:
> Hi all...
> 
>     I've got a bit of an oddball problem here... I need to fool an
> ethernet interface into thinking it's up (it's a long story, just trust
> me that I need to do this). I tried doing a crossover cable of sorts by
> snipping a cat5 cable, stripping the plastic, and twisting together 1-3
> and 2-6. Doesn't work. I'm guessing I need some sort of capacitor or
> something in the loop, but all I can find on google is xover cables
> (great, but there's only 1 enet interface in the loop so it's useless).
> Anybody know where I need to look to find a solution?

That sounds like it should work, in terms of simple electrical
connections. On the other hand, the twisting-stuff-together approach
might not satisfy the ethernet specs too well ...

I've just made a similar loopback plug, which makes my laptop say

eth0: lost link beat
eth0: flipped to 10baseT

when I unplug it and plug it back in.

The other thing that occurs to me is that if your NIC can't do full
duplex it might not work, since it can't hear itself when it's talking.

Anyway - where are you?

I've got this thing and don't really need it ...

I'm in Willis St (until I go home, which is soon)

Richard