Re: 3270 session disconnects

This is a firewall issue, pure and simple. And don't let the network
folks say any different.

Discover each network appliance in the respective paths and find the
ones that are unique to the falling path.

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@xxxxxxxxxxx] On
Behalf Of David Logan
Sent: Tuesday, January 06, 2009 2:38 PM
To: IBM-MAIN@xxxxxxxxxxx
Subject: Re: 3270 session disconnects

We have been experiencing this at our shop for months. Local connections
are
fine. When we logon to a mainframe on the same local network, we can
stay
logged on all day. But when we logon to a mainframe across the WAN,
after a
few minutes of inactivity, something times out, and it's not TSO,
because
the userid stays logged on and we don't get the VTAM screen.

It's really bizarre. It doesn't happen on the AS/400 partitions or on
VSE or
on VM near as I can tell. It only happens on sessions controlled by MVS
TCP/IP (with VTAM.)

David Logan
Manager of Product Development, Pitney Bowes Business Insight
http://centrus.com
W: (720) 564-3056
C: (303) 818-8222


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@xxxxxxxxxxx] On
Behalf
Of Martin Kline
Sent: Tuesday, January 06, 2009 12:53
To: IBM-MAIN@xxxxxxxxxxx
Subject: Re: 3270 session disconnects

You may be timed out by the application to which you signon.
Telnet/tn3270
may have a timeout value. TSO has a timeout value. TPX and Teleview and
other session monitors have timeout values. CICS may have a timeout
value.
The Telnet parameters may also be set to disconnect when you end the
application session (or it is timed out and ends).

So, my first question would be, "What is one of the applications?"

2nd, what are the telnet options?


I (and many other users) are presently experiencing what appears to be
random disconnects of our 3270 terminal emulator sessions. The
disconnects

seem to only occur after random periods of little or no activity. Our
terminal
emulator software is predominately Rumba (Wall Data). I have installed
and

tested with both Mocha and Vista3270 with the same results. I have
been
banging my head against a wall while trying to figure this one out,
with
little
success. Any advice, suggestions, diagnostic recommendations, etc are
certainly welcome.



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