I have a Dell Inspiron 3500 PII 366 with 128 MB RAM and a PCMCIA LAN 
Card.  It is a Dell Fast Ethernet 10/100 Base-TX made by 3com model number 
3CCFE575BT-D.  The problem that I am having is that when I try a transfer 
of data between high speed ports 100Mbs across a ftp connection the card 
appears to time out and quit responding.  I can 
restart /etc/init.d/network and it works great for about 10 seconds 
transferring data between the laptop and my RH 6.2 server on the local 
LAN.  After about 10 seconds, the network interface dies.  However, when I 
am accessing data outside the LAN, as in web pages, it appears to work 
fine and does not time out.  This has been repeatable across multiple cold 
reboots.  If there is any more information that would be more useful, 
please ask.

thanks,
steven westbrook