SNA TCP/IP Integration

This course introduces the issues, problems, and solutions to the challenges in integrating SNA and TCP/IP networks. Emphasis is placed on open standard solutions (via RFCs,) although some innovative vendor-specific solutions are also included. All variations of SNA are covered, including subarea SNA and APPN (including APPN/HPR). This course is primarily concerned with identifying the areas of difficulty and suggesting standard solutions to overcome these, the aim is to provide attendees with the background information necessary to make sensible choices for their own networks. This is not a prescriptive course, and no 'best' solutions are offered.

What you will learn

On successful completion of this course you will be able to:

  • describe the major characteristics of SNA and TCP/IP networks
  • identify network integration objectives
  • describe the addressing and naming schemes used in SNA and TCP/IP networks
  • identify the differences between transparent bridges and source route bridges
  • explain how SNA and TCP/IP can share a common bridged network via X.25, Frame Relay, and ATM
  • explain how SNA/APPN and TCP/IP can be routed via multiprotocol routers
  • describe how subarea SNA can be routed over TCP/IP using Data Link Switching
  • describe how TCP/IP traffic can be routed over SNA using NCP as a router
  • explain the operation of a gateway and describe the major gateway configurations
  • describe how TCP/IP for MVS and VTAM act as a host gateway, and how Microsoft's SNA Server acts as a LAN gateway
  • explain how a network gateway operates and state the two main varieties
  • explain the principles and operation of the Multi-Protocol Transport Network
  • describe how access to existing CICS and IMS applications can be provided from TCP/IP hosts via the CICS Client/Server and CICS Web Interface products
  • explain the principles and facilities of an SNA web co-processor
  • describe how existing SNA green-screen user interfaces can be easily upgraded.

Who Should Attend

Network technicians, operators, managers and planners from both the SNA and TCP/IP environments.


Existing knowledge of either (or both) SNA and TCP/IP are highly desirable, although a review of the operation of these networks is provided.


3 days

Fee (per attendee)



This includes free online 24/7 access to course notes.


Hard copy course notes are available on request from

at £50.00 plus carriage per set.

Course Code




Integrating dissimilar networks; SNA: origin, network characteristics, end user expectations, addressing and naming; TCP/IP: origind, network characteristics, end user experiences, addressing and naming; SNA Advanced Peer to Peer Networking: network characteristics, end user experiences, addressing and naming, advantages and disadvantages; eliminating parallel networks: via bridges, via routers; application integration via gateways; Internet/Intranet connectivity; integrated network management.

Bridge and Router Solutions

Where bridges fit in; bridging technologies: Ethernet, Token Ring; specialised bridges; bridging SNA and TCP/IP; SDLC to LLC-2 conversion; transporting SNA and TCP/IP over X.25; X.25 in operation; QLLC and RFC1356 differences; transporting SNA and TCP/IP over Frame Relay; Frame Relay in operation; RFC1490 packet formats; transporting SNA and TCP/IP over ATM; ATM in operation; RFC1483 cell formats; routers; routable and non-routable protocols; multi-protocol routers; routing SNA over TCP/IP: issues, solutions; Data Link Switching (DLSw) via RFC1795; routing SNA over TCP/IP - Enterprise Extender; routing TCP/IP over SNA; configuring SNALINK & NCST; NCP as an IP router; configuring NCP as an IP router.

Gateway solutions

How gateways work; location options; Control Unit Gateway via IBM3174; host gateway via TCP/IP for MVS; TCP/IP for MVS profile dataset; Profile Dataset Definitions; VTAM LU definitions for Telnet Server; SNA to TCP/IP via gateway; TCP/IP for MVS; Network Gateway: operation, implementations; Host Gateway via Microsoft SNA Server; Microsoft SNA Server: functionality, protocol support, configuration; Downstream PU Support (DSPU); SNA Server; Multi-Protocol Transport Network; MPTN network blueprint; Common Transport Semantics; function compensation; address mapping; algorithmic conversion; Protocol Specific Directory; address mapper; MPTN transport gateway; multiple MPTN gateways; MPTN implementations: IBM AnyNet, 3rd party, advantages & disadvantages.

Internet/Intranet connectivity solutions

OS/390 Secure Web Server; CICS applications and OpenEdition/DCE; accessing CICS applications; CICS: Client/Server, Web Interface; SNA-Web Co-Processor Technology; OC:/Web Connect Pro for S/390; IBM's Host-On-Demand; improving the user interface; OC://Open Vista: overview, development screen; a Browser-Centric Future?

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