Maybe an autonegotiation problem? 

Forum: 3Com PCMCIA Ethernet Adapter Issues
Re: Problem with 3c575 (Guenther Wieser)
Date: 1999, Dec 01
From: David Hinds <dhinds@pcmcia.sourceforge.org>

This sounds like it could be a problem with negotiating full versus half duplex. You can get a diagnostic program from Donald Becker's web site that will let you examine and modify the transceiver settings. It is the mii-diag program, at: http://cesdis.gsfc.nasa.gov/linux/diag -- Dave

Messages Inline: Outline:

1. Thanks, Problem solved, was... by Guenther Wieser, 1999, Dec 03

to: "Maybe an autonegotiation problem?"