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Re: Linksys EtherFast NIC, full duplex?



on Sun, May 06, 2001 at 08:58:33AM -0500, Jack (ifup@yifan.net) wrote:
> Hi,
> 
> I have two machine connected using crossover cable and LinkSys EtherFast
> 10/100 Cards.  (same card on both machine).  I only get 4-5Mbyte/sec
> when ftp or nfs between each other.   Both machine are running Woody.
> 
> I am sure it's not the best it can get with those NICs.  I can get
> 9-10Mbytes/sec if I boot one machine into freebsd.  here is ifconfig
> from freebsd:
> 
> dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         inet 192.168.0.2 netmask 0xffffff00 broadcast 192.168.0.255
>         inet6 fe80::203:6dff:fe1b:b60e%dc0 prefixlen 64 scopeid 0x2 
>         ether 00:03:6d:1b:b6:0e 
>         media: autoselect (100baseTX <full-duplex>) status: active
>         supported media: autoselect 100baseTX <full-duplex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP none
> 
>   (I do not know how to get duplex status on debian, help me?)
> 
> I just tested it again (using 130M big file):
> 
>    ncftp reports:   (debian) --> (freebsd) 8.24 MB/s
>                     (debian) <-- (freebsd) 9.54 MB/s
> 
> I can only get 60% of that when have both to be Debian.  Both debian
> are using the driver compiled from the source comes in floppy(4.1
> version) 

Haven't seen a response.

My understanding is that running NICs through a hub (non-switched)
network results in half-duplex operation.  Only switched networks are
full-duplex.  But I don't know what I'm talking about.

-- 
Karsten M. Self <kmself@ix.netcom.com>    http://kmself.home.netcom.com/
 What part of "Gestalt" don't you understand?       There is no K5 cabal
  http://gestalt-system.sourceforge.net/         http://www.kuro5hin.org

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