Doesn't z/OS work with a real 3270 as a console? If so, then it's the ICC 
that's doing something nonstandard with the 3270 setting.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List [[email protected]] on behalf of 
Tony Thigpen [[email protected]]
Sent: Tuesday, July 21, 2020 9:18 AM
To: [email protected]
Subject: Re: Multi-channel OSA-ICC routing and TCP port behavior

Brian,

In regards to the '3270' or 'console' setting, that is very specific to
z/OS. On z/VSE and z/VM the consoles are set to '3270' in the ICC
configuration. Setting the value to 'console' for them will lead to
problems. Yet, on z/OS, you must set the field to 'console' handle to
some quirk that z/OS has as it relates to consoles.

So, back to your question: "Why?", because z/OS again used something
non-standard in the operating system.

(As someone that works across all three of the operating systems, I see
this often. z/OS plays by it's own house rules, not the rules printed
inside the box top.)

Tony Thigpen

Brian Westerman wrote on 7/21/20 4:44 AM:
> I completely disagree.  Why would IBM have two settings in the configuration 
> screen for them, one as a 3270 and the other as a console, if they only 
> wanted you to be able to use consoles?
>
> Brian
>
> On Mon, 20 Jul 2020 11:25:54 +0000, Parwez Hamid <[email protected]> 
> wrote:
>
>> Agreed. The full name is OSA-Express Integrated Console Controller and was 
>> primarly meant to provide Console Support to IPL OSes. Overtime, its use has 
>> evolved but the basic concept remains.
>>
>> Regards
>>
>> Parwez Hamid​
>>
>> ________________________________
>> From: IBM Mainframe Discussion List <[email protected]> on behalf of 
>> R.S. <[email protected]>
>> Sent: 20 July 2020 12:17
>> To: [email protected] <[email protected]>
>> Subject: Re: Multi-channel OSA-ICC routing and TCP port behavior
>>
>> Excuse me, but IMHO OSA-ICC is just way to get rid off old equipment
>> like 3174L. It is NOT replacement, it is only for local (called non-SNA)
>> terminals, printers and ...CONSOLES. Consoles are the most important. Of
>> course 3172, 3274, and other controllers were not the goal.
>>
>> IBM went looong way from 3174s to to ICC. There were 2074 (quite
>> expensive), VTAM consoles (not very usable for IPL), older SYSCON
>> (Operating System Messages on HMC) and the latest 3270-like SYSG aka
>> PCOMM-like icon in HMC. SYSG is AFAIK z/VM nomenclature.
>>
>>
>> BTW, Note, nomenclaure for "HMC-like" consoles:
>> 1. Operating System Messages
>> z/VM: SYSC
>> z/OS: SYSCON
>>
>> 2. HMC Integrated 3270 console (is it proper name?)
>> z/VM: SYSG
>> z/OS: HMCS
>>
>> I don't know about other OSes.
>>
>> --
>> Radoslaw Skorupka
>> Lodz, Poland
>>
>>
>>
>>
>>
>>
>> W dniu 19.07.2020 o 15:17, Tony Thigpen pisze:
>>> Christian,
>>> I was dismayed too when I first discovered this limitation. The OSA-C
>>> was originally intended to eliminate the local 3174 requirement. It
>>> was not really designed to replace the 3172-003, which is what many
>>> are using it for today.
>>>
>>> And, you also need to look back at the OSA-C's roots which was the
>>> 3274 emulation in the P370, P390 and the MP3000.
>>>
>>> Tony Thigpen
>>>
>>> Christian Svensson wrote on 7/19/20 8:40 AM:
>>>> Thanks for the input folks.
>>>>
>>>> Brian: I have it working just fine, the setup was easy as you said - the
>>>> reason I started this thread was because I couldn't understand why the
>>>> limitations on the TCP port number and the philosophy behind the
>>>> routing.
>>>>
>>>> It seems pretty weird to me that IBM implemented ICC this way, but hey -
>>>> I'm just a stranger on the internet :-)
>>>>
>>>>
>>>> Regards,
>>>>
>>>> On Sun, Jul 19, 2020, 06:52 Brian Westerman
>>>> <[email protected]>
>>>> wrote:
>>>>
>>>>> You can set up some of the ports to be local VTAM terminals, then
>>>>> you can
>>>>> use VISTA (or any 3270 emulator) to connect into the ICC port 3270,
>>>>> and use
>>>>> the LUNAME of the 3270 you defined as a local 3270 terminal. Since
>>>>> you can
>>>>> have over 100 terminals per port, making them all os consoles is a
>>>>> waste,
>>>>> so having a bunch of them as local 3270's that you can give to your
>>>>> carious
>>>>> LPARs (and use EE to connect to the LPARs they are not connected
>>>>> to), is a
>>>>> great way to use them.
>>>>>
>>>>> I like to make the first 16 to 32 devices OS consoles and the rest
>>>>> of them
>>>>> local 3270s.
>>>>>
>>>>> So you are using TCP to get to them inside the ICC, but they are
>>>>> technically local 3270 terminals.  I think you can make some of them
>>>>> printers if you want, but that seems like a waste.
>>
>>
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