Dual ethernet support (ISC 2.2)

[Karl Denninger]

In article <1991Mar21.143214.20517 at scuzzy.in-berlin.de> src at scuzzy.in-berlin.de (Heiko Blume) writes:
>karl at ddsw1.MCS.COM (Karl Denninger) writes:
>
>>In article <352 at audfax.audiofax.com> deb at audfax.audiofax.com (Deb Jackson) writes:
>>>Has anyone ever run dual ethernets under ISC2.2? 
>
>>You can't use two 3c503 cards; I NEVER did get that to work. 
>
>be careful. just because you didn't get that to work that doesn't mean that
>it's impossible!

This is true, but see below.

>there is a 17 page paper called "setting up a gateway on a 386/ix
>system with hdb tcp" by Kevin Haley and John Antypas. on page
>three (ff) it goes into detail about installing a second ethernet
>board of the *same* type. i won't type in those four pages now,
>you should be able to get this doc from ISC. the original
>poster should get it also, it tells you everything you need to
>setup a gateway.

Have YOU done it with two 3c503s?

If not, then I suggest you try.  You'll find that it doesn't work.  ISC has
admitted to this.

I have read, and used, the instructions you mention.  They're in the 2.2 ISC
manuals.  Two WD cards, or one WD and one 3c503 card, work fine.  Two 3c503s
do NOT work.

In any case, you do have to set up the files by hand. 

I'm not sure of the reason for the problem but I will note that the 3c503
can use DMA..... and it appears you can't change the DMA channel!  Perhaps 
the ISC driver uses that mode (the 503 has three operating modes).

Try it sometime with two 503s.

--
Karl Denninger (karl at ddsw1.MCS.COM, <well-connected>!ddsw1!karl)
Public Access Data Line: [+1 708 808-7300], Voice: [+1 708 808-7200]
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