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Re: 100Mbs ether cards talking @ 10Mbs ...



On Tue, 05 Dec 2000 09:13:38 -0200, Jan Pfeifer writes:
>I have two computers connected with a crossover cable (BTW, thanks
>&rw), both with 100Mb/s ethernet cards (SIS900 & RealTek 8139) but
>they seem to be connected only by 10Mb/s (NFS transfers are at a bit
>more than 1 mbyte/s). I just compiled the drivers into the kernel. 

The only way to really measure the speed of the cards (and not of hard 
 disk, nfs-subsystem etc) is to send _huge_ amounts of data really, 
 really fast.

Personally I like netcat (it´s debianized) for that sort of stuff, just
  dd if=/dev/null | netcat 1.2.3.4
and, on the other side
  netcat -listen >/dev/null
(I´m not sure about the exact synta, but it´s easy enough).

>am I forgetting to set something ? I think maybe this is a too
>specific question for this list (sorry), so any pointers to other
>lists/documents are welcome.

If the cards are autosensing there´s a good possibility that they 
 negotiated 10 mbit/s, most cards come with a DOS-driver where you can 
 explicitly set spped&duplex (they memorize that, so you need only do 
 it once).

cheers,
&rw
-- 
/  Ing. Robert Waldner  | Network Engineer | T: +43 1 89933  F: x533 \ 
\ <Waldner@KPNQwest.at> |    KPNQwest/AT   | Diefenbachg. 35, A-1150 / 




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