Re: SOS - why does an application work fine with a hub but not a switch box?
From: David Schwartz (davids_at_webmaster.com)
Date: Mon, 25 Aug 2003 17:10:36 -0700
"L" <email@example.com> wrote in message
> (1) When we connect the target machine with the host machine by using a
> network hub, the throughput between the target and the host is around
> 9.5MB/sec, which has saturated the bandwidth of the 10/100 port (this is
> good and what we expected).
> (2) When we connect both the target and the host machines by using a
> box, the throughput drops to 2MB/sec.
> (3) When we connect both the target and the host machines directely by
> a crossover Ethernect cable, the throughput is around 1.5MB/sec.
> What could be wrong with it? Do we need to modify the original Linux
> Ethernet supporting files, or do we need to setup something? We have
> different switch boxes with different setups (e.g. turn on port fast,
> but didn't get any improvement.
Try locking all endpoints to the appropriate duplex settings. This
sounds like a negotiation problem.