OSA-Express Console support
This chapter describes the IBM Open Systems Adapter-Express Integrated Console Controller (OSA-ICC) function of the OSA-Express6S, OSA-Express5S, OSA-Express4S, and OSA-Express3 1000BASE-T features.
The OSA-ICC function supports TN3270 console (TN3270E), local non-SNA DFT 3270 emulation, and 328x printer emulation. This emulation support for console session connections is integrated in IBM Z platforms. It can help reduce cost and complexity by eliminating the requirement for external console controllers, such as the IBM 2074 and IBM 3174 controllers.
The following topics are covered in this chapter:
•A description of the OSA-ICC
•Migration considerations
•Minimum software support
6.1 Description
OSA-ICC support is a no-charge function that is included in Licensed Internal Code (LIC) on the Z platform. With z14 and z14 ZR1, ICC is available only by using the OSA-Express6S 1000BASE-T feature. For z13, z13s, zEC12, and zBC12, it is available through the OSA-Express5S, OSA-Express4S, and OSA-Express3 1000BASE-T Ethernet features.
The OSA-ICC supports Ethernet-attached TN3270E consoles and provides a system console function at IPL time and operating systems support for multiple logical partitions. Console support can be used by IBM z/OS, IBM z/VM, IBM z/VSE, and IBM z/Transaction Processing Facility (z/TPF) software. The OSA-ICC also supports local non-SNA DFT 3270 and 328x printer emulation for IBM Time Sharing Option Extensions (TSO/E), IBM CICS®, IBM Information Management System (IMS™), or any other 3270 application that communicates through VTAM. For z14 with FC #0034, 3215 emulation is provided for z/TPF 1.1. For prior server generations, 3215 emulation for z/TPF 1.1 is provided via RPQ 8P2339,
With the 1000BASE-T Ethernet features, the OSA-ICC is configured on a port-by-port basis, by using the channel path identifier (CHPID) type OSC. When the CHPID shares two ports the following server definition rules apply:
•Each physical port is defined to a unique IP network port number.
•Different subnets are defined for each physical port host IP.
•There is a single defined common gateway router with an interface on each IP subnet. Only one of the IP network ports defines the IP default gateway.
Each CHPID can support up to 120 console session connections. These connections can be shared among logical partitions by using the multiple image facility (MIF) and can be spanned across multiple channel subsystems (CSSes).
OSA-ICC (CHPID type OSC) SSL Support
TLS/SSL with Certificate Authentication was added1 to the OSC CHPID to provide a secure and validated method for connecting clients to the IBM Z host. Up to 48 secure sessions per CHPID can be defined (the overall maximum of 120 connections unchanged).
Figure 6-1 shows an example of the OSA-Express Integrated Console Controller in a single system configuration.
Figure 6-1 Example of an OSA-ICC configuration
The following features are included in base support for the OSA-ICC:
•Local and remote session connectivity, depending on the provided security and networking environment
•Local and remote connections for configuration changes by using security features of the IBM Z Hardware Management Console environment
•Coexistence in configurations with IBM 2074 and IBM 3174 console controllers
6.2 Connectivity
IBM Z platforms have base Licensed Internal Code support for the OSA-ICC function. At least one 1000BASE-T Ethernet feature must be installed.
The Hardware Management Console (HMC) or Support Element (SE) is used to create the configuration source file for the OSA-ICC CHPID and for operation and diagnosis.
The OSA-Express6S 1000BASE-T (FC 0417) and OSA-Express5S 1000BASE-T (FC 0426) Ethernet features support the OSC CHPID. FC 0426 is supported only on z14 server. FC 0417 is supported on the Z platform (carry forward only on z14 and z14 ZR1). The feature has two ports with one CHPID associated to the two ports.
The OSA-Express4S 1000BASE-T Ethernet feature (FC 0408) supports the OSC CHPID. FC 0408 is supported on the z14, z14 ZR1, z13, and z13s as a carry forward feature, and on the zEC12 and zBC12. It has two ports, with one CHPID associated to the two ports.
The OSA-Express3 1000BASE-T Ethernet features (FC 3367 and FC 3369) support the OSC CHPID as carried forward features. FC 3367 has four ports, with one CHPID associated to each of the two corresponding ports and is supported on the zEC12 and zBC12. FC 3369 has two ports, with one CHPID associated to the two ports and supported on the zBC12.
6.3 Software support
For more information about the operating systems that are supported on IBM Z platforms, go to this website:
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Note: Certain functions might require specific levels of an operating system, program temporary fixes (PTFs), or both. That information is provided when necessary within this chapter.
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Consult the appropriate Preventive Service Planning (PSP) buckets (3906DEVICE, 3907DEVICE, 2964DEVICE, 2965DEVICE, 2828DEVICE, and 2827DEVICE) before implementation.
6.3.1 TN3270E emulation
The TN3270E emulation program that is used with the OSA-ICC must comply with the TN3270E (TN3270 Enhancements) protocol (RFC 2355), which allows for the following functions:
•The ability to request that a connection is associated with a specific 3270 LU or pool name.
•Access to the SNA bind information. Until it receives the bind information, the session runs at the SSCP-LU level.
•Handling of SNA positive and negative responses.
•Universal support of the 3270 ATTN and SYSREQ keys.
•Support for the emulation of the 328x class of printer.
IBM Personal Communications V5.6 and later supports TN3270 Extensions that are used for OSA-ICC support. Personal Communications is a component of the IBM Access Client Package for Multiplatforms program suite. For more information, see this web page:
6.4 Summary
These are the key characteristics of the Open Systems Adapter-Express Integrated Console Controller (OSA-ICC) function:
•A no-charge function that is integrated in z14, z14 ZR1, z13, z13s, and zEC12, and zBC12 LIC.
•Support in IBM z13 and zEnterprise CPCs by using the OSA-Express4S and OSA-Express3 1000BASE-T features2.
•Each OSC CHPID can support up to 120 console session connections, be shared among logical partitions, and be spanned across multiple CSSes.
•Support for TN3270 Enhancements (TN3270E) and local non-SNA DFT 3270 emulation by using Ethernet-attached workstations.
•Console support that can be used by z/OS, z/VM, z/VSE, and z/TPF.
•Local non-SNA DFT 3270 and 328x printer emulation support that can be used by TSO/E, CICS, IMS, or any other 3270 application that communicates through VTAM.
•TLS/SSL with Certificate Authentication was added3to the OSC CHPID to provide a secure and validated method for connecting clients to the IBM Z host. Up to 48 secure sessions per CHPID can be defined (the overall maximum of 120 connections is unchanged).
The OSA-ICC function provides several potential benefits:
•Simplicity:
– Uses installed 1000BASE-T Ethernet for both console sessions and networking traffic
– External controllers are no longer needed
•Scalable capacity:
– Facilitates addition of partitions and operations support pools
– Can be shared by up to 85 logical partitions on z14 and z13
– Can be shared by up to 40 partitions on z14 ZR1 and z13s
– Can be shared by up to 60 logical partitions on zEC12
– Can be shared by up to 30 logical partitions on zBC12
•Improved availability
– Can enable lights out operation
– Hot plug OSA availability characteristics
– OSA features are a highly integrated component of the IBM Z platform, with the reliability, availability, and serviceability characteristics inherent in IBM Z
•Low operating cost versus external console controller:
– Power, cooling, cabling, and floor space requirements are minimized
– No rack necessary
6.5 References
For more information about the OSA-ICC function, see the following publications:
•OSA-Express Integrated Console Controller Implementation Guide, SG24-6364
•Open Systems Adapter Integrated Console Controller User’s Guide, SC27-9003
•Input/Output Configuration Program Users’s Guide for ICP IOCP, SB10-7172
•OSA-Express3 Integrated Console Controller Dual-Port User’s Guide, SC23-2266
1 Supported on z13 and z13s. See the latest HMC driver level for feature support.
2 OSA-Express2 is not available on z13, zEC12, and zBC12. OSA-Express3S is available only on zEC12 and zBC12 as a carry-forward.
3 Supported on z13 and z13s. See the latest HMC driver level for feature support.
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