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From: ken@uctcs.uucp (Ken McGregor)
Newsgroups: comp.sys.ncr
Subject: Re: Finding out if TCP/IP is up
Message-ID: <1991May16.120829.13363@ucthpx.uct.ac.za>
Date: 16 May 91 12:08:29 GMT
Article-I.D.: ucthpx.1991May16.120829.13363
References: <91130.081040TEMNGT23@ysub.ysu.edu>
Sender: news@ucthpx.uct.ac.za (UCT News Admin.)
Reply-To: ken@staff.UUCP (Ken McGregor)
Organization: Dept. of Computer Science, University of Cape Town
Lines: 26

In article <91130.081040TEMNGT23@ysub.ysu.edu> TEMNGT23@ysub.ysu.edu (Lou Anschuetz) writes:
>I have an NCR Tower 700 with 16MB of memory.  All my users come in
>through the Ethernet board via a terminal server.  It is possible

>allocating thousands of 2k streams.  I am already set at maximum
>for 2k streams, so there is nothing further I can do there.  The
>problem is that WIN TCP/IP on seeing this error quietly dies.
>
>What I need, therefore, is a way to determine if TCP/IP is up
>from cron.  If it is not I can do a win restart (a little
>undocumented feature....).

Are you sure that this will work.  We have a similar problem with WIN-TCP on
our Tower 600's.  Some resource jams and the system fills up the 2k stream
blocks.  We are only using terminals on the terminal servers - not pc's.
When we restart TCP it restarts fine, but the streams are still full, so it
never comes up.  What we do to solve the problem is a total reboot.

We can identify the problem be running crash with input from a file.  This 
runs strstat.  Pipe the output into grep 2048, cut on the free field, then
test for 0.  If so reboot.  We run this via cron every 15 minutes.

I wish however that there was a solution available to WIN.
Ken MacGregor                                             ken@cs.uct.ac.za
Computer Science                             ken%uctcs%quagga@uunet.uu.net
University of Cape Town   ...uunet!{m2xenix!quagga,ddsw1!olsa99}!uctcs!ken