Yes, Sergio, the Communications Server for Data Center Deployment can connect 3270 from VSE to z/OS. The Comm. Server can use a DLUR Passthru definition for a port on LLC2, or IEEE 802.3, which will send the PU/LU connection from zVSE to zOS. This configuration is preferred because it is dynamic and very little needs to be configured on CS Linux. As long as CS Linux us a Branch Extender or a Network Node, the DLUR Passthru can be configured.
When configuring the Ehternet Port, the following must be configured:
implicit_dspu_services = DLUR <-- Type of service
implicit_dspu_template = LLC008 <-- Any 1 to 6 character template the DLUR name will inherit to generate a dynamic name for.
Jeff Smith
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Jeff Smith
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Original Message:
Sent: Sun October 20, 2024 07:38 AM
From: Sergio Conte
Subject: Can CSDCD be used to connect VTAM on z/VSE to VTAM on z/OS?
Hello Jeff.
Is also possible connect a terminal 3270 from Zvse to cics on Zos through CSDCD on Linux? My environment is: Zvse configured as EN, Zos configured as NN and Linux configured Branch Extender. Cics-to-cics works fine.
Many thanks
Sergio
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Sergio Conte
Original Message:
Sent: Mon July 25, 2022 08:51 AM
From: Jeff Smith
Subject: Can CSDCD be used to connect VTAM on z/VSE to VTAM on z/OS?
Sorry for the confusion Leigh.
On IBM Z, the z/OS Comm. Server (VTAM) requires a specific OSA adapter to support LLC2, 802.3 (SNA over Ethernet). It is the OSA-Express adapter. It can run in LCS and LSA mode. The OSA-E LSA mode must be enabled for it to connect VTAM to the Ethernet for SNA. On IBM Z, the Communications Server for Data Center Deployment has no requirement on any specific adapter. It can use any OSA adapter that supports enable LLC2 (SNA over Ethernet) connections.
Attached is a Session presentation for the recently announced Statement of Direction for the Elimination of OSA-E on IBM-Z. The CSDCD will continue to support LLC2 on IBM-Z, but the OSA-E LSA and LCS functions are not going to be integrated in future IBM Z hardware or software releases. The last chart show CSDCD provided that support for the LLC2 as the OSA-E LSA function goes away.
Jeff L Smith Communications Server Development
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Jeff Smith
Original Message:
Sent: Fri July 22, 2022 04:59 PM
From: Leigh Compton
Subject: Can CSDCD be used to connect VTAM on z/VSE to VTAM on z/OS?
Thank you for the quick reply. Are there examples or diagrams to show how to connect VSE to CSDCD? I'm confident that we can use Enterprise Extender to connect z/OS to CSDCD, thereby leveraging IP connectivity between the Linux server and z/OS.
I am confused, however. You first say that CSDCD is in use to connect zVSE to z/OS "where the z/OS does not have an OSA-E adapter". However, later on you state that "Z/OS Comm. Server requires an OSA-E adapter in LCS mode".
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Leigh Compton
Consulting IT Specialist - CICS and Enterprise Integration
IBM
TX
Original Message:
Sent: Fri July 22, 2022 04:48 PM
From: Jeff Smith
Subject: Can CSDCD be used to connect VTAM on z/VSE to VTAM on z/OS?
Yes, Leigh, the Communications Server for Data Center Deployment is being used for several accounts to connect zVSE to z/OS where the z/OS does not have an OSA-E adapter available. I am currently working with a customer to do a similar implementation, Microsoft Server 2020 using Enterprise Extender connecting to CICS on z/VSE. We installed a Comm. Server for Linux acting as a Network Node and it handles the connections automatically between the two.
The Comm. Server for Linux on IBM Z can use any adapter (QDIO) to implement the LLC2 (SNA over Ethernet). Z/OS Comm. Server requires an OSA-E adapter in LCS mode. The Comm. Server for Linux can be Intel, Power or IBM Z Linux.
Jeff L Smith Communications Server Development
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Jeff Smith
Original Message:
Sent: Fri July 22, 2022 04:02 PM
From: Leigh Compton
Subject: Can CSDCD be used to connect VTAM on z/VSE to VTAM on z/OS?
I've been approached by a business partner whose customer is migrating their environment from z/VSE to z/OS. During the migration phase, they want to connect CICS on VSE to CICS on z/OS. The only connectivity supported by CICS on VSE is SNA. z/OS supports SNA over IP via Enterprise Extender, but VSE does *not*. (Nor does the z/VM in which z/VSE executes.). I have a tickle at the back of my brain that says CSDCD is the strategic replacement for 3745/NCP (which the customer doesn't have anyway), but I'm not sure that's exactly true.
So, I'm asking the experts here if it is indeed possible to use CSDCD to connect the VTAM networks. I'd definitely be wanting to use Enterprise Extender between CSDCD and z/OS, but I'm not sure if it's possible to connect to z/VSE and thus relay the SNA traffic through CSDCD.
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Leigh Compton
Consulting IT Specialist - CICS and Enterprise Integration
IBM
TX
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