[techtalk] Re: Problems with two ethernet cards

[Justin Zygmont]

On Mon, 10 Jul 2000, bill t wrote:

> 
> Here is the situation.
> 
> I am building a firewall with an old 486 33 Mhz.
> Motherboard = ???
> ram = 20 M
> hd = 800 M
>  2 3com 3c509 ethernet cards
>  1 56 k zircon internal modem
> 
> The problem.
> The network hangs.
> if one ethernet card is started I can ping the test machine easily. When the
> second is turned on everything freezes.
> 
> Questions
> 
> Has anyone seen this before?
> Is there a fix?

Yes.  I had the EXACT same problem.  Your 3c509's are defaulting to IRQ 10
since they are PnP.  My solution was to but a jumpered SMC card for $5 and
set it's IRQ to something other that 10.  The remaining 3com will work
fine.  The 3coms will chose IRQ 10 regardless of any software settings.

hope this helps...


> For the record I haven't gone through the howto networking on this yet but
> plan to download the most recent.
> 
> Any help would be appriciated
> 
> Thanks,
> Bill 
> 
> 
> 
> 
> 
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