[olug] MDI/MDIX autodetection (was nonnetwork)

Daniel Pfile daniel at pfile.net
Fri Oct 21 03:07:18 UTC 2005


The gigabit port on my powerbook auto detects. It's handy to only  
have to carry one cable.

-- Daniel

On Oct 20, 2005, at 9:12 PM, Neal Rauhauser wrote:

>
>  Some switches on the low end of the food chain will autodetect if  
> the remote is a PC (MDI) or another hub(MDIX). This is done to ease  
> daisy chaining of these devices without the need for a patch cable  
> that swaps pin 1 to 3 and 2 to 6 - the layout required for an  
> ethernet crossover.
>
>  I've never seen and I don't believe it makes any sense for their  
> to be an autodetecting PCI or integrated NIC. The only single port  
> devices I can think of that do this would be some cable modems or  
> the WAN port on cable/DSL routers.
>
>  Making a crossover takes all of five minutes if you've got ends  
> and a crimp tool ...
>
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