Diagnosing a slow network

[jjohnson at sunrise-linux.com (miah)]

Don't forget that your hub/switch needs to support FDX for full duplex
mode to work.  Some cards can determine automatically if the
hub/switch supports FDX/100, but some detect incorrectly and run at
10/HDX.  I've even had cards run at 10/HDX on a port that was
configured for FDX, which gave some interesting results.

-miah

On Tue, Aug 10, 2004 at 07:45:47AM -0400, Jerry Feldman wrote:
> My old laptop did not have a built-in and I bought a PCMCIA card that
> supported 10/100. I then ran one of these benchmarks and found that I
> was not getting close to 100Mbps. I returned the card for a cardbus
> card. Also, as David mentioned, your network cards should be configured
> for full-duplex. Most will automatically come up with full-duplex, but I
> have seen some cards that somehow get stuck in half-duplex.