Newsgroups: comp.sys.apollo
Path: utzoo!utgpu!news-server.csri.toronto.edu!helios.physics.utoronto.ca!alchemy.chem.utoronto.ca!system
From: system@alchemy.chem.utoronto.ca (System Admin (Mike Peterson))
Subject: Re: TCP/IP problems on DN10k
Message-ID: <1991Jan31.161650.2117@alchemy.chem.utoronto.ca>
Summary: Add to FAQ, please!
Organization: University of Toronto Chemistry Department
References: <1991Jan31.003842.14404@engin.umich.edu>
Date: Thu, 31 Jan 1991 16:16:50 GMT

In article <1991Jan31.003842.14404@engin.umich.edu> jal@acc.flint.umich.edu (John Lauro) writes:
>Has anyone experienced any TCP/IP problems on the DN10k?
>  <description of standard TCP/IP problems deleted to prevent net.boredom>
>
>Any ideas?  Can anyone reproduce this problem with the 10k?
>I would like to know how reproducable it is before I call it into Apollo...
>
>One last note...  I removed the -c from tcpd on all hosts.

This should be added to the FAQ file (if there is one).

We have seen this problem for over 2 years, on SR10.0.p, SR10.1.p,
SR10.2.p and SR10.3.p with so many patches I can't even begin to count
them all. Please do call Apollo and tell them you see this problem too -
what users we have left will thank you. I have more than 10 calls
(dating back 1 1/2 years) on this problem, plus a few APR's.

The last I heard, the problem is caused by a glitch in the VME Ethernet
card, which causes it to lock up. The node then effectively disappears
from the network. What relation this has to the dropped/delayed packets
I'm not sure.

We just removed -c from tcpd, and that makes no difference.

This problem alone has caused us to buy no more Apollo workstations;
we are getting SGI and IBM RS/6000 boxes, each of which has their own
problems, but at least they don't disappear from the network or hang
once a week (our average over the last 2 years with the DN10000).
-- 
Mike Peterson, System Administrator, U/Toronto Department of Chemistry
E-mail: system@alchemy.chem.utoronto.ca
Tel: (416) 978-7094                  Fax: (416) 978-8775