I'd first try a PCMCIA driver upgrade
Xircom PCMCIA Ethernet Adapter Issues
RBE-100 freezes system on startup and insertion (Julian Smith)
Date: 2000, Jul 07
From: David Hinds <email@example.com>
The drivers in RH6.2 are version 3.1.8; the latest are 3.1.17.
Tried that...no good... by Julian Smith, 2000, Jul 09
You can try a suggestion from the HOWTO by David Hinds, 2000, Jul 10
David defeats Goliath by Julian Smith, 2000, Jul 12
to: "I'd first try a PCMCIA driver upgrade"