[ale] Dual NICs

[Dave Brooks]

Should be no problem, here goes nothing:

1)  Type 'cat /proc/interrupts' at a command line.  You should see
something like this:

elysium:[/etc]% cat /proc/interrupts
           CPU0       
  0:   42164765          XT-PIC  timer
  1:     226680          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
 10:     750582          XT-PIC  eth0
 12:    1333612          XT-PIC  PS/2 Mouse
 13:          1          XT-PIC  fpu
 14:     243342          XT-PIC  ide0
 15:          5          XT-PIC  ide1
NMI:          0
elysium:[/etc]% 

As you can see, the numbers on the left correspond to an IRQ, and the
far right shows what that IRQ is being used by.  So basically, pick
something thats not in use and use it.  (if you have a sound card thats
not in use, and your IRQ 5 is open, dont pick that one).  

Do an '/sbin/ifconfig' and get the I/O address off eth1.
You will then need to load the second ethernet card with:

insmod whatever.o io=whatever_it_is irq=whatever_you_picked

If that doesnt work, you may need to play with some modules..

-Dave
dbrooks at comstar.net



Robert Heaven wrote:
> 
> I'm setting up a dual NICed Linux box in anticipation of cable modem
> service. When Linux boots up it automatically detects both NICs but it
> assigns the same IRQ (11) to both cards. Both cards are 3Com 3C900 (PCI)
> 10baseT.
> 
> Q: Is there a utility to see what IRQs are currently in use.
> Q: How (using Red Hat) do I tell it to assign a different IRQ to the second
> card.

--
David A. Brooks
ComStar Communications, Inc.
voice : 770-485-6029
pager : 770-379-2333
:wq