Page 1¶

ND SNA Gateway II¶

ND 211277

flowchart TB
    A(IBM Host)
    B(SNA Gateway II (SDLC))
    C(COSMOS Connection<br>(LAN or WAN))
    D(LU type 2)
    E(ND SNA 3270<br>Program Access II)
    F(LU type 1,2,3)
    G(ND SNA 3270<br>Term. Emulator II)
    H(LU type 1)
    I(ND SNA RJE II<br>Remote Job Entry)
    J(Job Output)
    K(Job Input (queue))

    A --> B
    B --> C
    C --> D
    C --> F
    C --> H
    D --> E
    F --> G
    H --> I
    I --> J
    J --> K

ND Norsk Data

Page 2¶

ND SNA Gateway II¶

Introduction¶

The ND SNA Gateway II allows an ND system with locally attached devices to connect to an IBM® SNA network. The SNA Gateway II is the second generation of SNA Gateways. This implementation gives support to LU6.2 which is one of the main elements in IBM's SAA (System Application Architecture).

The gateway runs one communication line. The product emulates the SNA PU type 2 secondary, and consists of the following:

ND 210569 PIOC Basic Software.
ND 211277 SNA Gateway II.

Features¶

Supports different LU types (0, 1, 2, 3 and 6.2)
Supports 65 LUs
Supports IBM maintenance applications (NCCF, NPDA etc.)
Logging facility
Configuration facility
Supports COSMOS
Up to four PIOCs/SNA Gateways in one ND system.

               PIOC                                           ND
      <-----------------------------> <----------------------------->

+-----------------+
| IBM Mainframe   |
+-----------------+

+---------------------------------------------+
| SNA NETWORK                                  |
|     +-------------------------------------+  |
|     | SNA Controller including SNA        |  |
|     | Gateway Software                    |  |
|     +-------------------------------------+  |
|     | Terminal Emulation                  |  |
|     | Remote Job Entry                    |  |
|     | Program Access                      |  |
|     | DISOSS BRIDGE                       |  |
|     | Remote Terminal Server              |  |
|     | Local Applications                  |  |
|     | APPC - LU6.2                        |  |
|     | Progr. Library II                   |  |
|     +-------------------------------------+  |
|                                             |
+---------------------------------------------+

   <--------- COSMOS --------->

Figure 1

Product Description¶

The ND SNA Gateway II includes the ND SNA Basic Software which covers the data-link control, the path control, the transmission control and the data-flow control of the SNA architecture. As can be seen from figure 1, the SNA Basic Software is implemented in the PIOC (ND Programmable Input/Output Controller). This relieves the ND-1xx of much of the communication protocol handling. The PIOC is built around a Motorola 68000 processor with 512 Kbyte RAM. The communication lines on the PIOC use RS232 C (V.24) interface.

Page 3¶

ND SNA Gateway II¶

The application in the ND system can be a background program (SNA 3274 emulation or a customer-written application), or a real-time program (Remote Job Entry). Application programs can be distributed on different ND computers using the COSMOS network, giving all users access to all applications from any computer in the network. SNA Gateway II supports APPC-LU6.2 Program Library.

Network Management¶

The SNA Gateway Supervisor, which is part of the Gateway Module, is a menu-oriented RT program. The program performs such functions as starting and stopping the links, monitoring and configuration. Among the monitoring functions are:

Indicating configuration status
Getting the LU status
Checking the performance of the Gateway
Indicating the quality of the line
Getting DLC statistics

The configuration functions are:

Allocating CPUs, terminals or applications to dedicated LUs
Giving passwords to each LU

Requirements¶

SINTRAN III VSE/VSX version K or later
PIOC, 512 Kbyte - ND 108670
PIOC Basic Software - ND 210569
XMSG Single System (Included in SINTRAN) or
XMSG Inter System (Included in COSMOS Basic Module)

Documentation¶

Document	Reference
SNA Gateway II Supervisor	ND-830113 EN
SNA 3270 Program Access II Programmer Guide	ND-860310 EN
SNA APPC-LU6.2 Programmer Guide	ND-860273 EN
ND SNA Gateway II Host Considerations	ND-860350 EN

Abbreviations¶

SNA — Systems Network Architecture
DLC — Data Link Control
PU — Physical Unit
LU — Logical Unit
PIOC — Programmable Input/Output Controller
XMSG — Intersystem communication system
APPC — Advanced Program-to-program Communication.

Page 4¶

Contact Information¶

Region	Tel
Corporate Headquarters	Tel. : +47-2-626000
Norway	Tel. : +47-2-822000
Sweden	Tel. : +46-760-98400
Denmark	Tel. : +45-2-88555
Finland	Tel. : +358-0-369811
United Kingdom	Tel. : +44-635-35544
West Germany	Tel. : +49-6172-4080
Belgium	Tel. : +32-2-7251560
France	Tel. : +33-1-45371200
Ireland	[Illegible]
Luxembourg	Tel. : +352-466161/8/9
The Netherlands	Tel. : +31-3402-72411
Spain	Tel. : +34-3-2152287 +
Switzerland	Tel. : +41-21-25012
Hong Kong	Tel. : +852-5-411912/412053
USA	Tel. : +1-617-365-4692
TecLANd	Tel. : +354-1-53711
India	Tel. : +9144-419217/419126
Pakistan	Tel. : +92-51-851446
Thailand	Tel. : +66-2-253-9892/4
ND Comtec Headquarters	Tel. : +47-2-626000
ND Comtec Austria	Tel. : +43-2266-5355
ND Comtec USA	Tel. : +1-316-636-5000

Note: Information in this document is subject to change without notice and does not represent a commitment on the part of Norsk Data.