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  • Subject: RE: Weirdo Twinax Address Problem
  • From: Cyndi Bradberry <CyndiB@xxxxxxxx>
  • Date: Wed, 24 Feb 1999 09:45:02 -0700

Jeff,

We added a device to an existing run, and started experiencing signal loss
due to the length of run back and forth to the wiring closet and patch
panel. I don't know what your cable looks like, but this might somewhere to
look. It only took us 6 weeks to figure it out ;-)

HTH,
TIA,

Cyndi Bradberry
Idaho Housing and Finance Association
Boise, Idaho



-----Original Message-----
From: Jeff Crosby [mailto:jlcrosby@fwi.com]
Sent: Wednesday, February 24, 1999 8:16 AM
To: Midrange List Server (David Gibbs)
Subject: Weirdo Twinax Address Problem


I guess one has never seen it all because I saw a new one yesterday and
today. <g>

I got a new IBM 6400 printer yesterday.  My twinax port 0 cabling looks
like this:

        Console (3180 display) at address 0
        Printer (Anzac 5080) at address 1
        Printer (Anzac 3017) at address 2

The above is also the _physical_ cabling device order.  I set this new
printer to address 3 and tried to physically cable it in between the 2
existing printers on port 0.  All 3 devices were powered off during
these attempts.

It wouldn't work.  When I would power the console back on, there was no
display.  Doing a WRKCFGSTS at another display showed the console as
SIGNON DISPLAY, but the console screen was blank.  I didn't even try the
2 existing printers.  No print device was autoconfigured for the new
printer.  It was as if the twinax card in the new printer was DOA or
something.

This morning I tried something different.  I had an open port (port 7)
on the AS/400 with no devices on it.  I ran a cable from this port on
the AS/400 to the new printer and powered it on.  The AS/400
autoconfigured it just as I expected, device type 4234 address 3.  I
have not tried recabling it into the port 0 string where I really want
it.

Has anyone seen this?  Is there some restriction on port 0 (other than
address 0 for the console) that I evidently don't know about?  Is this
new printer so new that it won't coexist on the same port with that
ancient 3180 and Anzac printers? <g>  Will the AS/400 not autoconfigure
on port 0?

Thanks for any help.

-- 
-Jeff

jlcrosby@fwi.com
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