Red Hat LINUX 7.2 Reference Manual page 325

Section A.4:Ethernet parameters
Table A–6 Ethernet Parameter Configuration Examples
Configuration
NE2000 ISA card at IO address 300 and IRQ 11 ne=0x300,11 ether=0x300,11,eth0
Wavelan card at IO 390, autoprobe for IRQ, and
use the NWID to 0x4321
A.4.1 Using Multiple Ethernet Cards
You can use multiple Ethernet cards in one machine. If each card uses a different driver (for example,
a 3c509 and a DE425), you simply need to add alias (and possibly options) lines for each card to
/etc/modules.conf. See the Official Red Hat Linux Customization Guide for more information.
If any two Ethernet cards use the same driver (such as two 3c509 cards or a 3c595 and a 3c905), you
will need to either give the two card addresses on the driver's options line (for ISA cards) or simply
add one alias line for each card (for PCI cards).
For additional information about using more than one Ethernet card, see the Linux Ethernet-HOWTO
at http://www.redhat.com/mirrors/LDP/HOWTO/Ethernet-HOWTO.html.
Example
wavelan=0,0x390,0x4321
ether=0,0x390,0x4321,eth0
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