IBM 3745 130, 3745 150, 3745 170 Introduction Manual
IBM 3745 Communication Controller
Models 130, 150, and 170
IBM
Introduction
GA33-0138-2
IBM 3745 Communication Controller
Models 130, 150, and 170
Introduction
IBM
GA33-0138-2
Third Edition (June 1991)
This major revision obsoletes and replaces GA33-0138-1. It reflects new enhancements to the IBM 3745 Communication Controller
Models 130, 150, and 170. Changes or additions to the text and illustrations are showed by a vertical line to the left of the change.
Changes are made periodically to the information in this publication; before using this publication in connection with the operation of
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IBM System/370, 30xx, 4300, and 9370 Processor Bibliography, GC20-0001.
Copyright International Business Machines Corporation 1989, 1991. All rights reserved.
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IBM
| VTAM
| ES/9000
| Personal System/2
3090
LPDA
VM/XA
RETAIN
OS/2
PS/2
Personal Computer AT
Personal Computer XT
NetView
ESA
MVS/XA
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VSE
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iii
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his own
expense.
Properly shielded and grounded cables and connectors must be used in order to meet FCC emission limits. IBM is not responsible
for any radio or television interference caused by using other than recommended cables and connectors or by unauthorized changes
or modifications to this equipment. Unauthorized changes or modifications could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
In addition to the above FCC statement, you should be aware that:
The statement applies only to IBM 3745-130/150/170 Communication Controllers used in the USA and
having a label on the back that indicates compliance.
The phrase
instruction manual
means this manual and:
IBM System/360, System/370, 4300 Processors: Input/Output Equipment Installation Manual - Physical
Planning,
IBM 3745-130/150/170 Preparing for Connection,
IBM 3745 Communication Controller: Connection and Integration,
GC22-7064
GA33-0140.
SA33-0141.
For Canada, Canadian Department of Communication Statement, GX27-3883 applies.
iv IBM 3745 Models 130, 150, 170: Introduction
IBM 3745 Communication Controller Model 130, 150, or 170 with an IBM 3151 Display Station as
Operator Console.
Note: This picture shows the design model only.
v
vi IBM 3745 Models 130, 150, 170: Introduction
About This Book
How to Use This Book
This book has been written to help you understand the basic concepts of IBM
communication controllers, and especially the key advantages and capabilities of
the IBM 3745 Communication Controller Models 130, 150, and 170 for your
network. These controllers and the appropriate programming support are
described; as well as the powerful problem determination mechanisms and the
controller maintenance philosophy.
understanding the main functions of the product.
details for specialists to help them plan their network.
The charts at the back of the manual can be removed to make foils for
presentations when required.
The text in color is for fast reading and
The smaller black text describes
Who Should Use This Book
This book is for network specialists, data processing managers, and planners who
want to learn about and evaluate the capabilities of the IBM 3745 Communication
Controller Models 130, 150, and 170 in their data communication network.
The reader is assumed to be familiar with data communication networks
Terms Used in This Book
A list of abbreviations is provided at the back of the book.
The term 3745 applies to the 3745 Models 130, 150, or 170. Sometimes the model
| numbers are added to 3745 when a precise discrimination between 3745 models
| 210/310/410/610 and 130/150/170 is necessary.
| The term Network Control Program (NCP) stands for Advanced Communications
| Function for the Network Control Program (ACF/NCP) when used alone.
The terms DCE and DTE used throughout this book stand for:
DCE Data circuit-terminating equipment (such as modems, data service units, or
auto-call units)
DTE Data terminal equipment.
What is New in This Book
The additional text, showed by revisions bars to the left, describes the latest
enhancements:
| Attachment to Ethernet** Version 2 and IEEE 802.3 local area network (LAN).
| Timed initial program load (IPL).
| Rename load module function.
Copyright IBM Corp. 1989, 1991 vii
| 3745 installation and reconfiguration improvements.
Where to Find More Information
The “Bibliography” on page X-11. lists 3745 manuals according to the user tasks
they describe.
viii IBM 3745 Models 130, 150, 170: Introduction
Contents
About This Book ................................... vii
How to Use This Book ................................. vii
Who Should Use This Book .............................. vii
Terms Used in This Book ............................... vii
What is New in This Book ............................... vii
Where to Find More Information ........................... viii
Chapter 1. Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
IBM 3745 Communication Controllers in a Typical Network .......... 1-3
3745 Model 170 Environment ........................... 1-4
3745 Model 150 Environment ........................... 1-4
3745 Model 130 Environment ........................... 1-5
IBM 3745-130/150/170 Communication Controller Connectivity ......... 1-6
IBM 3745 Models 130, 150, and 170 ....................... 1-8
Chapter 2. IBM 3745 Models 130, 150, and 170 Highlights ......... 2-1
Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Usability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Serviceability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Chapter 3. Program Support and Network Management ........... 3-1
Controller-Resident Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Network Control Program (NCP) ......................... 3-1
Partitioned Emulation Programming Extension ................. 3-2
Generating and Loading the Control Program .................. 3-2
Multiple Load Module ................................ 3-3
Automatic Control Program Load ......................... 3-4
Coexistence and Migration ............................. 3-5
Host-Resident Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Operating Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Access Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
System Support Programs ............................. 3-6
Network Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Chapter 4. Controller Description . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Control Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Central Control Unit ................................. 4-2
Channel Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Communication Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Transmission Subsystem (TSS) .......................... 4-7
Low-Speed Scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
LIC Base (LIB) ................................... 4-10
High-Performance Transmission Subsystem (HPTSS) ............ 4-17
Communication Scanner Processor ....................... 4-17
Front-End Scanner High-Speed ......................... 4-17
Token-Ring Subsystem (TRSS) ......................... 4-18
Token-Ring Multiplexer (TRM) .......................... 4-18
Token-Ring Interface Coupler (TIC) ....................... 4-18
Copyright IBM Corp. 1989, 1991 ix
| Ethernet-Type LAN Subsystem (ESS) ..................... 4-19
Maintenance and Operator Subsystem (MOSS) ................. 4-20
Operator Consoles and Remote Support Facility ............... 4-24
MOSS Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
MOSS User Facilities ............................... 4-30
Chapter 5. Problem Determination . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Error Detection and Reporting ............................ 5-1
NetView Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Box Event Records ................................. 5-3
AutoBER Program and Refcode ......................... 5-4
Retry and Recovery ................................. 5-4
Chapter 6. Controller Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Remote Support Facility ................................ 6-4
Installation and Upgrade ................................ 6-5
3745-130/150/170 General Data Flow ........................ 6-6
Appendix A. Data Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Data Clocking for Low-Speed Scanners ...................... A-1
Data Clocking for High-Speed Scanners ..................... A-3
List of Abbreviations ................................ X-1
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-5
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-11
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-13
Foils for Customer Presentations ........................ X-17
x IBM 3745 Models 130, 150, 170: Introduction
Chapter 1. Highlights
In today's communication networks, the communication controllers save much data
processing power by handling sophisticated functions to control the data flow
between host processors and the network of terminals.
The IBM communication controllers are intelligent and multifunctional systems
dedicated to communications. They are able to serve as nodes (data processing
center nodes, distributed data processing center nodes, concentrator access nodes,
intermediate routing nodes) in the network.
Intelligent
network, like routes.
Multifunctional
facilities stored in the IBM communication controllers to perform functions such as:
Route selection
Multihost access
Data switching
Network management
Message sequencing
Pacing
Flow control.
refers to their ability to dynamically alter certain characteristics of the
refers to their capability of taking advantage of the SNA software
in addition to the physical transmission and reception of data.
Copyright IBM Corp. 1989, 1991 1-1
The IBM communication controllers run under control of the Network Control
Program (NCP) stored in their own storage and generated in the host using the
System Support Programs (SSP).
1-2 IBM 3745 Models 130, 150, 170: Introduction
IBM 3745 Communication Controllers in a Typical Network
Chapter 1. Highlights 1-3
3745 Model 170 Environment
4 Channel adapters
96 Low/medium-speed lines
32 Integrated DCEs (Modems/DSUs)
4 High-speed lines (2 active at a time)
2 Token-rings
| 4 Ethernet-type LANs
|
|
| Program,
NOTE:
All the above connection capabilities might not be present at the same
time as some items are mutually exclusive (see
GA33-0093).
3745 Model 150 Environment
32 Low/medium-speed lines
16 Integrated DCEs (Modems/DSUs)
2 High-speed lines (1 active at a time)
2 Token-rings
| 2 Ethernet-type LANs
IBM 3745 Configuration
NOTE:
All the above connection capabilities might not be present at the same
time as some items are mutually exclusive (see
Program,
1-4 IBM 3745 Models 130, 150, 170: Introduction
IBM 3745 Configuration
GA33-0093).
3745 Model 130 Environment
4 Channel adapters
4 High-speed lines (2 active at a time)
4 Token-rings
| 4 Ethernet-type LANs
NOTE:
All the above connection capabilities might not be present at the same
time as some items are mutually exclusive (see
Program,
GA33-0093).
IBM 3745 Configuration
Chapter 1. Highlights 1-5
IBM 3745-130/150/170 Communication Controller Connectivity
The following figure shows that, a 3745-130/150/170 can be:
| g
|
1 Channel-attached
2 Link-attached
(via a channel adapter) to one or more hosts.
(via telecommunication facilities) to a host through another IBM
communication controller (allowing a 3745-130/150/170 to be used as a
remote concentrator).
Then, the 3745-130/150/170 allows simultaneous connection to:
a
Other IBM communication controllers, via high-speed lines (such as T1 or
CEPT) and their associated DCEs.
b
Other IBM communication controllers, via medium or high-speed lines and
their associated DCEs.
c
Local clusters and terminals, directly attached without DCE.
d
Remote clusters and terminals, via stand-alone DCEs and telecommunication
facilities (switched or nonswitched).
e
Remote communication controllers, clusters, and terminals, via X.25 public
data networks.
f
Remote communication controllers, clusters, and terminals, via integrated
DCEs and 4-wire nonswitched telecommunication facilities or DDS network in
U.S.A.
Communication controllers, clusters, and terminals on IBM token-ring local
area networks or on Ethernet-type local area networks.
1-6 IBM 3745 Models 130, 150, 170: Introduction
These capabilities allow network growth by permitting combinations of
3745-130/150/170 with other IBM communication controllers.
|
|
Different combinations of channel, transmission line, Ethernet-type network, and
token-ring network attachments are possible.
The modularity of the 3745-130/150/170 hardware and control programs provides a
high degree of flexibility in configuring and reconfiguring the networks.
The host processors connected to a 3745-130/150/170 can be the IBM 4341, 4361,
| 4381, 937X, 308X, 3090*, or ES/9000* Processors.
Chapter 1. Highlights 1-7
IBM 3745 Models 130, 150, and 170
The 3745 Communication Controller Models 130, 150, and 170 complement the
|
|
IBM 3745 communication controller family and are compatible with IBM
communication controllers: 3705, 3725, 3720, 3745 models 210, 310, 410, and 610.
| 3745
| 3745
| 3745
| 3745
| 3745
| 3745
| 3745
| 130
| 150
| 170
| 210
| 310
| 410
| 610
| CCU
| 1
| 1
| 1
| 1
| 1
| 2
| 2
| Main storage (MB)
| 8
| 8
| 8
| 8
| 8
| 2 x 8
| 2 x 8
| Channel adapters
| 4
| 0
| 4
| 16
| 16
| 16
| 16
| Low/medium-speed lines
| 0
| 32
| 96
| 896
| 896
| 896
| 896
| Integrated DCEs (Modems/DSUs)
| 0
| 16
| 32
| 416
| 416
| 416
| 416
| High-speed lines
| 4*
| 2*
| 4*
| 16*
| 16*
| 16*
| 16*
| Token-rings
| 4
| 2
| 2
| 8
| 8
| 8
| 8
| Ethernet-type LANs
| 4
| 2
| 4
| 16
| 16
| 16
| 16
* Half are active at one time
NOTE:
time as some items are mutually exclusive (see
Program,
All the above connection capabilities might not be present at the same
IBM 3745 Configuration
GA33-0093).
1-8 IBM 3745 Models 130, 150, 170: Introduction
Chapter 2. IBM 3745 Models 130, 150, and 170 Highlights
|
Availability
Like the IBM 3745 models 210, 310, 410, and 610 the IBM 3745 models 130, 150,
and 170 contribute to improved
of the network. IBM 3745 models 130, 150, and 170 also provide a high degree of
reliability and an advantageous
The IBM 3745 models 130, 150, and 170 offers increased availability
characteristics. Some of them enhance the operational aspect of managing local or
remote controllers. Also, the LSI technology ensures higher reliability.
The main characteristics contributing to high availability are:
Hot pluggability, which allows the user to remove, add, or replace a LIC while
the 3745 is operational. Plugging or unplugging does not affect the other line
operation.
External cable plugging/unplugging by the user.
Concurrent diagnostics. Most components and subsystems can be diagnosed
while the 3745 continues to run.
Remote support facility.
The following capabilities also enhance the availability of the controller operation:
Scheduled power on.
availability, performance, usability,
price/performance ratio
.
and
connectivity
| Concurrent and scheduled IPL in all network communication controller nodes
| (Timed IPL function)
Up to two control program load modules stored on the communication
controller's integrated hard disk. This allows fast and nondisruptive control
program loading.
One central control unit (CCU) dump module, also on the integrated hard disk.
This allows fast dumping after CCU failure.
Remote access to the maintenance and operator subsystem (MOSS).
Improved error messages and error checking and correction (ECC).
Performance
The system performance of a 3745 model 130, 150, or 170 is higher than for a
3720 or a 3725.
The main elements contributing to higher performance are:
Increased CCU performance: about 1.5 times the 3725; about 4 times the
3720.
"Cache" high-speed buffer (HSB) with a capacity of 32KB (KB equals
1024 bytes). This lets the transfer of instructions and data from main storage
match the CCU cycle time.
Main storage of 4 or 8MB (MB equals 1 048 576 bytes).
Copyright IBM Corp. 1989, 1991 2-1
Configuration of channel adapters (CAs) for a maximum of four host
connections, optionally with data streaming protocol.
High-performance transmission subsystem (HPTSS) with SDLC high-speed
lines (1.5 Mbps with T1 clear channel or 2 Mbps with CEPT clear channel).
Direct memory access (DMA) with DMA bus, allowing the high-performance
transmission subsystem (HPTSS) to work efficiently by transferring data directly
to or from main storage.
Selective scanning, ensuring increased flexibility for LIC configurations and
reduced scanning load. Only the LICs with active connected lines are scanned.
Usability
The 3745 design contains a user access area. Access to such areas enables the
user to install, remove, or repair devices (line interface couplers and cables) while
the controller is operating (hot pluggability). The LIC can be plugged or unplugged
without disturbing the scanner or impairing the network.
| At 3745 initial installation, IBM service will do the standard cable installation,
| connection, and testing. IBM service will also install LIC MES cables at user
| request. After 3745 initial installation, the user can install and connect external
| cables, except channel cables.
| Network IPL operations are now easier with a shorter execution time. The timed
| IPL function allows restarting a large network, or part of it, including several nodes,
| at a scheduled time, from one port of this network. See also “Automatic Control
| Program Load” on page 3-4.
Enhanced load module operation allows the operator to transfer and save the
control program load modules on the hard disk. This operation and the replacement
or purge of a load module already stored on disk are executed in a nondisruptive
manner. The controller will continue to run and the currently-running load module
will not be affected. The user can select the load module to be used for controller
| initialization from the host or from the 3745 console. The rename load module
| function allows renaming of the MOSS disk active module and the standby module.
| This renaming can be initiated from any VTAM console in the network.
More usability is offered for channel adapter control. The channel adapters can be
enabled or disabled from the 3745 operator console at any time. Also, the native
and emulated subchannel address range can be set from the 3745 operator
console. This capability avoids the need to use hardware jumpers to set these
options.
Increased usability is available for setting the speed of direct-attached lines. The
MOSS uses the speed defined in the control program load module.
Enhanced MOSS functions provide the user with improved tools for error detection
and failure isolation. Problem determination facilities and controller services under
user control contribute to better serviceability and usability. The menu design of
the MOSS functions at the 3745 console eases using the MOSS functions.
2-2 IBM 3745 Models 130, 150, 170: Introduction
Serviceability
Error handling is improved by:
Tracking of all detected incidents
Box event records (BERs), relating to hardware or microcode, stored on
controller hard disk
Automatic BER analysis (autoBER)
Alarms
Generic alerts via the NetView* program
Controller resource reactivation, for example: automatic control program
loading, MOSS and scanner microcode loading
Line wrap test
Internal scanner interface trace (SIT) trace stacked on controller hard disk
Concurrent NCP and scanner dumps on controller hard disk
Continued operation avoiding controller shutdown in various failure situations.
Connectivity
The error-handling procedures and improved problem determination lead to better
serviceability.
The architecture of the 3745 models 130, 150, and 170 has been designed to cope
with constant changes in communication facilities:
Rapid network growth
Added complexity
New applications
Additional communication facilities.
See “IBM 3745 Models 130, 150, and 170” on page 1-8 and Connectivity on page
1-6 for detailed channel and communication interface capabilities.
The configuration initially defined at installation (generation) can be upgraded at
any time to meet growing network requirements.
Chapter 2. IBM 3745 Models 130, 150, and 170 Highlights 2-3
2-4 IBM 3745 Models 130, 150, 170: Introduction
Chapter 3. Program Support and Network Management
The 3745 operates under the control of various IBM licensed programs:
Controller-Resident Programs
The 3745 runs under control of one of the following:
Advanced Communications Function for the Network Control Program
(ACF/NCP), abbreviated NCP in this book, to support SNA devices, or
Emulation Program (EP) in partitioned emulation programming (PEP) mode to
support non-SNA devices.
Network Control Program (NCP)
NCP Version 5 provides major capabilities for SNA networks with synchronous data
link control (SDLC). The 3745 operates with:
NCP Version 5 Release 2.1 under MVS, VM, and VSE*.
NCP Version 5 Release 3 under MVS, VM, and VSE.
NCP Version 5 Release 3.1 under MVS.
NCP Version 5 Release 4 under MVS, and VM.
|
|
|
Copyright IBM Corp. 1989, 1991 3-1
NCP Version 5 Release 4 or any previous NCP releases do not support the
Ethernet LAN adapter. The functions support will be provided with a then current
NCP and SSP.
Start-stop and binary synchronous terminals can be migrated to a 3745 with the
IBM Network Terminal Option (NTO) program. For start-stop protocols, NCP
supports a variety of transmission codes including ASCII, EBCDIC, EBCD, and
BCD. Further, it supports a correspondence code for which it provides translation
from and to EBCDIC. For the BSC protocol, this support and translation operation
is performed by the scanners.
NCP provides the controller flexibility to meet the demands of an expanding
network. It works with the host access method to control networks, from the
simplest single-domain network with a single controller, to complex multiple-domain
networks using the Advanced Communications Function, in accordance with the
concepts of SNA.
NCP includes the following functions:
Token-ring interface
Airline Line Control Interface (ALCI) (optional/feature).
NCP coexists with the following IBM licensed programs:
Network Routing Facility (NRF)
Network Terminal Option (NTO)
Non-SNA Interconnection (NSI)
X.25 NCP Packet Switching Interface (NPSI)
X.25 SNA Interconnection (XI)
X.21 Short Hold Mode/Multiple Port Sharing (X.21 SH/MPS).
Partitioned Emulation Programming Extension
The partitioned emulation programming (PEP) extension of NCP allows the NCP
and the EP to coexist in the same 3745. PEP lets NCP operate certain lines in
network control mode while operating others in emulation mode.
PEP can run only in a channel-attached controller. Channel attachment must be a
byte multiplexer channel, where one emulated subchannel address is specified per
EP line. Buffer chaining process does not support EP traffic under PEP.
PEP emulates most of the functions of the IBM 2701 Data Adapter Unit, IBM 2702
Transmission Control, or IBM 2703 Transmission Control and can communicate
with various access methods running in the host. Most programs written for these
machines can operate in a 3745 without modification. However, programs that
involve timing or special hardware considerations may have to be changed.
Generating and Loading the Control Program
We use SSP elsewhere on the owning host to generate the control program load
module (up to 6MB) and to load it into the controller storage. The control program
for the controller is generated from standard program modules of the NCP library
using the NCP/EP definition facility (NDF). The control program must reflect the
required controller configuration. Several control programs can be generated to
handle different subsets of lines attached to the same controller.
3-2 IBM 3745 Models 130, 150, 170: Introduction
Multiple Load Module
The network operator can transfer and save either one or two CCU load modules
(up to 6MB per load module) on the integrated hard disk. Either load module can
be selected for loading at controller initialization.
When initiating a control program load request at the host, the network operator
can designate the disk-resident load module that will be
control program loading and dump.
| The network operator can change the external name of a communication controller
| load module on the MOSS disk. The rename load module function is started by a
| modified VTAM command (load command).
A control program load request that is initiated automatically by MOSS uses the
load module last loaded in the CCU if it was saved to the disk or loaded from the
disk during IPL. This load module is displayed specified as the
at the 3745 console (see “Disk IPL Information” on page 4-32).
Remote Loading and Activation
For a remote 3745 connected to a channel-attached 3745 via a switched subarea
link (NTRI, X.21 switched or X.25 leased and switched), the remote loading and
activation capability allows the host (through VTAM commands) to load and start
the remote NCP:
active
for later automatic
active
load module
From the remote disk to the remote CCU storage
As the loading of the NCP load module on the remote 3745 hard disk is done via a
1MB diskette written from the local 3745 hard disk, this option is used when the
NCP load module size does not exceed 1MB. (See “MOSS Functions” on
page 4-27 for local disk to diskette and remote diskette to disk NCP transfer):
.
Chapter 3. Program Support and Network Management 3-3
From the host storage to the remote CCU storage
This option is used when the NCP load module size exceeds 1MB and cannot be
transported from the host to the remote 3745 via a 1MB diskette.
.
In this case a
is less than 1MB thus fitting onto a diskette. It is then transferred from this diskette
to the remote 3745 hard disk. On receipt of appropriate VTAM commands, this
reduced load module is loaded from the remote disk to the remote CCU storage
and there, handles the transfer of the complete NCP from the host storage to the
remote 3745 storage via the switched subarea link. (See “MOSS Functions” on
page 4-27 for local disk to diskette and remote diskette to disk transfer).
reduced NCP load module
Automatic Control Program Load
VTAM and the 3745 MOSS allow the automatic IPL and dump capabilities. For an
automatic IPL from the controller disk, the network operator must have specified
this option during NCP loading.
This capability can also be selected for any IPL operation. In that case:
The CCU initialization automatically uses the active disk-resident load module
after power-on or in case of CCU failure.
After an NCP abend or a hard CCU failure, there is an automatic dump of the
controller storage before the control program reloading. The dump is saved on
the controller disk. MOSS capabilities include transfer of the full or partial
dump, printing at the host, and purge of the dump.
See also “Automatic IPL and Dump” on page 4-29.
is generated in the host, the size of which
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|
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| The new loaded NCP module can be:
| A new module sent from VTAM
| A standby module already loaded on the MOSS disk.
Timed IPL
The timed IPL function allows controllers in a large network to automatically reload
at a scheduled time. The operator can send an IPL request to any part of the
network, from a VTAM console to define the IPL time. At the prescribed time all of
the selected controllers will automatically reload without any operator action.
3-4 IBM 3745 Models 130, 150, 170: Introduction
Coexistence and Migration
The NCP Version 5 operating the 3745 can coexist in a given network with other
IBM communication controllers with NCP levels described in the table below:
| IBM 3705| IBM 3725| IBM 3720| IBM 3745
| IBM 3745
| IBM 3745
| 210/410
| 130/150/170
| 310/610
| NCP V2
| NCP V2
| NCP V4 R1
| NCP V5 R2.1
| NCP V5 R2.1
| NCP V5 R4
| NCP V3
| NCP V3
| NCP V4 R2
| NCP V5 R3
| NCP V5 R3
| NCP V4 R1
| NCP V4 Subset
| NCP V5 R3.1
| NCP V5 R3.1
| NCP V4 R2
| NCP V5 R1
| NCP V5 R4
| NCP V5 R4
| NCP V4 R3
| NCP V5 R2
| NCP V4 R3.1
| NCP V5 R2.1
| NCP V5 R3
NCP allows 3745 to support networks based on the earlier IBM 2701 Data Adapter
Unit, IBM 2702 Transmission Control, or IBM 2703 Transmission Control, and
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|
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|
networks in which these units are emulated on a 3720 or on a 3725 via an
Emulation Program (EP 9). PEP permits migration from the 2701, 2702, 2703, and
from IBM 3704, 3705, 3720, and 3725 communication controllers that run EP. The
3745 Models 310 and 610 have no EP stand-alone support.
|
|
Stand-alone Emulation Program Release 8 operates in 3745 Model 210 or Model
410. The 3745 Models 310 and 610 have no EP stand-alone support.
Communication controllers configured with EP only, IBM Network Extension Facility
(NEF), or IBM Non-SNA Interconnection (NSI) can coexist with the 3745 in the
same network.
The IBM Transaction Processing Facility host program is supported by NCP
Version 5 Release 3 in the 3745.
The 3745 offers a path for conversion from existing systems and for continuing
growth. A system designed for the IBM 3725 or 3720 may be applied to the 3745
after regeneration of the control program. The control program resource definition
input to the 3725 or 3720 program generation can be used with some modifications
to statements (if the controller has the same line configuration).
Chapter 3. Program Support and Network Management 3-5
Host-Resident Programs
Operating Systems
MVS
MVS/XA*
MVS/ESA*
VM/SP
VM/SP HPO
VM/XA*
VSE/AF
VSE/SP.
Access Methods
Normal Mode:
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Virtual Telecommunications Access Method (VTAM) Version 3 Release 1.1,
Release 1.2, Release 2, Release 3, Release 4, or Release 4.1.
Emulation Mode:
Basic telecommunications access method (BTAM)
BTAM extended storage (BTAM-ES)
Remote terminal access method (RTAM).
System Support Programs
Advanced Communications Function for System Support Programs (SSP)
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Version 3 Release 4.1 or Release 5 in MVS, VM, or VSE environments,
Version 3 Release 5.1 in MVS environment,
Version 3 Release 6 in MVS and VM environments.
SSP is used to generate the 3745 control program.
In addition, SSP provides utilities for loading, dumping, and tracing the 3745 control
program. It also supports:
Dump transfer of the 3745 storage to the host.
Dump printing at the host.
3745 disk file transfer to the host.
Network Management
The 3745 network management is supported by the NetView program Releases 2
and 3. By monitoring and managing the controller and its resources, and by
diagnosing problems, this program contributes to the optimization of the 3745.
For example:
3-6 IBM 3745 Models 130, 150, 170: Introduction
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