See the HOWTO...
Xircom PCMCIA Ethernet Adapter Issues
Is RBEM56G 10/100 Ethernet + Modem 56 supported? (Stefan Kluth)
Depends on what you mean by "supported" (David Hinds)
ethernet works with workaround (Stefan Kluth)
I tried this on my Inspiron 7500 running RH 6.1 and CBEM56G (Charlie Zender)
Date: 2000, Jan 31
From: David Hinds <email@example.com>
The PCMCIA-HOWTO has a section that discusses different Linux
distributions. See the section about Red Hat, and the comments about
the Red Hat network configuration scripts.
OK, it works now by Charlie Zender, 2000, Jan 31
Both issues are tricky by David Hinds, 2000, Jan 31
to: "See the HOWTO..."