Re: [TCLUG:18250] multiple ethernet boards

[Mike Hicks <hick0088@tc.umn.edu>]

"David S. Cargo" wrote:
> 
> > From: shawn@webkromatic.com
> >
> > http://cesdis.gsfc.nasa.gov/linux/misc/multicard.html
> 
> My firewall setup is anticipated to have two 3c509 cards (which I have).
> I looked at the multicard.html file, but it doesn't answer some
> fundamental questions.
> 
> Can the ethernet cards share an IRQ (or do they need to be unique)?

The '509 is an ISA card.  Most ISA cards cannot share IRQs.

> (And where to I look to find out which ones are available?)

/proc/interrupts shows some of your options, though I think the card
configuration tool will show you the best options.  Also, you'll have to
remember to set up your BIOS properly so that it does not try to assign
those IRQs that you select to a PCI device.

I usually try to use 10, 11, or 12, but if you have a bare-bones
firewall, you should have plenty of free IRQs.

> What are the possible choices for the IO address?  (And where to I
> look to find out which ones are available?)

Again, the card configuration program is your best friend here.  0x300
is one I use a lot (plus I think that is one of the first auto-probe
addresses..), and there should be another number available nearby..

-- 
 _  _  _  _ _  ___    _ _  _  ___ _ _  __   Linux: Just do it. 
/ \/ \(_)| ' // ._\  / - \(_)/ ./| ' /(__                              
\_||_/|_||_|_\\___/  \_-_/|_|\__\|_|_\ __)                             
[ Mike Hicks | http://umn.edu/~hick0088/ | mailto:hick0088@tc.umn.edu ]