You might get more feedback using the listserver ibmtc...@vm.marist.edu
More Communication Server folks hang out there........
For my 2 cent...I am going strictly by memory here.......
I believe that more of the changes in Comm. Server (VTAM) between z/OS
1.4 and current were in the realm of APPN/EE/HPR. If you chose EE, you would be
doing all of the aforementioned in VTAM. It is likely that EE connections are
possible between the 1.4 system and current, however, there were some
enhancements along the way that are NOT compatible with "older" versions of
VTAM. HPRSESLIM is one that comes to mind. If the 1.4 VTAM does NOT support
HPRSESLM (I don't recall exactly when it was introduced), then if it is ENABLED
in the VTAMOPTS of the current system, it would prevent the connection from
being established.
If you chose CTC (MPC) for the connections, you could use Subarea SNA
(CDRMs). Of course, it is NOT the IBM preferred choice, but it is stable and it
is definitely supported at the z/OS 1.4 level of VTAM. There will be some setup
and coordination involved. The amount will depend upon the number of systems
you have to connect to the CMC.
Hth
Tony
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Rob Schramm
Sent: Monday, February 26, 2018 4:47 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: VTAM communication z/OS 2.2 and z/OS 1.4
What I want to do is run a z/OS 2.2 system as a CMC. Currently, there is no
connection between my z/OS 2.2 system and the z/OS 1.4 systems. My concern is
whether the z/OS 1.4 systems will be able to communicate with the z/OS 2.2
system across CTCs. Or if it would be better to attempt to run the
communication across EE. All of these system are in the same physical CEC.
Thanks,
Rob Schramm
Rob Schramm
Senior Systems Consultant
On Sat, Feb 24, 2018 at 12:30 AM, Brian Westerman <
brian_wester...@syzygyinc.com> wrote:
> I'm not sure what you are getting at. If you have a z/OS 1.4 system
> connected via EE (or a "real" CTC connection) to a 2.2 system and you
> tn3270 into that new(er) system, then every EE (or CTC connected, (i.e.
> cross domain)) application that is defined to that new(er) system
> (even if cross domain to the old box) is available. I think what you
> are trying to get at is that IF your old system doesn't support TCP/IP
> but can be connected to a new(er) system that does support both EE (or
> a CTC connection to the older box) and TCP/IP can you get to the VTAM
> applications that are available to the older system via the
> connections between the old system and new system, then the answer is
> yes. But since z/OS 1.4 also supported TCP/IP you don't need the
> other new(er) system for that.
>
> How you get INTO the system (any system) via TCP then any (VTAM)
> applications are available once you are there are available whether
> the connection is through a physical CTC between the two systems or EE
> (which can use IP).
>
> So I'm a little confused by the question. Just because you can't
> directly connect to the CICS region on the old(er) system via TCP,
> doesn't mean that you can't get to it via a TCP connected device.
> That's what the emulators are for. But maybe that's not your question either.
>
> Sorry that I can't help any more without some clarifications.
>
> Brian
>
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