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a3821414
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SNA/SDLC Link/iX, Technical Data
For HP 3000 Series 900 Computer Systems
Product Number 30291A
SNA/SDLC Link/iX provides the network connection for SNA services
running on an HP 3000 Series 900, such as SNA IMF/iX, SNA NRJE/iX,
LU 6.2 API/iX, and SNA DHCF/iX. System Network Architecture (SNA) is
IBM's comprehensive specification for distributed data processing
networks. SNA/SDLC Link/iX emulates the functions of SNA's Transmission
Control, Path Control, and Data Link Control layers on an HP 3000.
[Figure: SNA/SDLC Link/iX, Caption: none]
SNA/SDLC Link supports the simultaneous operation of two or more SNA
services. SNA/SDLC Link allows the HP 3000 to appear as a Node Type 2.0
or Node Type 2.1 device when connected to an IBM mainframe or a Node
Type 2.1 device when connected to an IBM AS/400. SNA/SDLC Link can
support several logical unit types that include LU 1, LU 2, LU 3, and
LU 6.2, depending upon the SNA service running. SNA/SDLC Link also
provides link level alerts to IBM's network management product, NetView.
Features
o The SNA/SDLC Link emulates the functions of the lower three SNA layers
and can support several SNA services running on the same HP 3000.
o SNA/SDLC Link consists of software, a hardware interface card, and a
cable.
o Delayed alert reporting of link errors to NetView console.
o Operators on the HP node can send operator generated alerts to the
NetView console.
o The hardware interface card in SNA/SDLC Link reduces CPU overhead.
o User applications run concurrently with SNA data communications.
o Each SNA/SDLC Link connects to a separate data communications line,
either dial-up or leased.
o Multiple SNA/SDLC Links allow concurrent connection to multiple hosts,
or multiple lines to a single host.
o A maximum data communications line speed of 64 Kbps is supported.
o Node management provides a friendly interface for configuration, event
tracing, and logging.
o Supports EIA RS-366 and CCITT V.25 Auto Call.
Functional Description
SNA/SDLC Link provides the connection to an IBM System/370-compatible
mainframe in an SNA network, through an IBM 37xx communications
controller or to an IBM AS/400 in an SNA network. SNA/SDLC Link allows
the HP 3000 to emulate the functions of the Transmission Control, Path
Control, and Data Link Control SNA layers.
Each SNA/SDLC Link connects to a single switched or nonswitched data
communications line. The HP 3000 supports multiple SNA/SDLC Links for
connection to multiple IBM mainframes and/or IBM AS/400s, or multiple
data communications lines to a single mainframe or AS/400. The maximum
line speed supported is 64 Kbps for SNA/SDLC Link/iX.
The Node Management interface provides the Network Manager with an
easy-to-use tool for configuration, event logging, and event tracing.
SNA/SDLC Link provides support for IBM's NetView product. This enables
the HP 3000 Series 900 to act as an Entry Point in IBM's NetView
environment. If an HP node's link goes down, SNA/SDLC Link will send a
delayed link-level alert to the NetView console when the link comes back
up. This feature also allows an operator on the HP node to send
operator generated alerts to the NetView console.
Functional Specifications
SNA/SDLC Link provides the connection between an HP 3000 and an
IBM System/370 or compatible host processor in an SNA network or between
an HP 3000 and an IBM AS/400 in an SNA network. It manages the SNA/SDLC
protocol for a switched or nonswitched data communications line, through
synchronous modems.
SNA/SDLC Link/iX supports synchronous modem speeds up to 64Kbps as
described below. SNA/SDLC Link requires synchronous modems that support
the following handshake signals: DTR, DSR, RTS, CTS, CD, RI. Modems
must also provide transmit and receive clocks for the SDLC interface and
ensure ground isolation between the communication systems. Some
examples of modems that are supported for SNA/SDLC Link are:
HP 37230A
AT&T 201C
AT&T 208 BR
AT&T 209A
AT&T 500B
AT&T 2024A
AT&T 2048A
AT&T 2096A
AT&T 2248A
AT&T 2556 DSU
AT&T 2596 DSU
CODEX 2640
CODEX 2660
CODEX 2680
CODEX 2260
GTE LENKURT 56K
DYNATECH LDM 22
Link Contents
SNA/SDLC Link consists of protocol handling software, an interface card,
and a modem cable.
The Interface Card
The interface card for SNA/SDLC Link/iX is the Programmable Serial
Interface (PSI) card. The PSI has a 68000 family microprocessor.
The Central Bus PSI is designed with LSI circuitry, and the Precision
Bus PSI is designed with LSI and VLSI circuitry, both supporting the
HP 3000 Series 900 architecture. Reference the individual HP 3000
processor data sheets for specific information regarding the appropriate
PSI card.
PSI/Features
o Data communications protocol handling
o Character handling and buffer storage capability
o Built-in diagnostics and self-test
o Online diagnostics run under MPE iX
o Collects data volume and error statistics
o Modem interface up to 64 Kbps
o Compatible with HP and common Telco/PTT modems in full- and
half-duplex modes
o SDLC protocol compatible
o EIA RS-232-C and CCITT V.24 and V.35 interfacing standards
o Auto Call capability, compatible with EIA RS-366 and CCITT V.25
standards
The Direct Memory Access (DMA) controller on the PSI provides channels
that link data buffers in onboard RAM with the HP 3000 interface and
data communications devices. DMA moves data between external devices
and onboard RAM concurrent with microprocessor operation. This ability
to transfer data concurrently with instruction execution enables the
interface card to achieve high throughput rates. Also contributing to
the high throughput rate is the interface card's ability to transfer the
last correctly received block of data to the HP 3000 CPU as it is also
processing and buffering the next block of data coming from the
communication channel.
Frees the HP 3000 for Other Tasks
Since the interface card microprocessor performs all of the
communication data link protocol management, the HP 3000 is relieved of
the task. Specifically, serialization, SDLC protocol management,
frame/block management, and data buffering are all performed by the
interface card. The interface card frees the HP 3000 to perform other
tasks, making it a more efficient resource.
Note: The HP 3000 CPU must still process message formats and higher
level procedures.
Additional flexibility is achieved with auto call capability. By
connecting an interface card to a modem and auto call unit and adding a
phone number to the link configuration file, a remote connection in a
dial-up environment can occur anytime without the intervention of an
operator.
High Data Integrity
When the SNA/SDLC Link is initialized, the interface card performs a
hardware self-test. This ensures the hardware is functional and will
perform the job properly. When data is transmitted, parity checking is
enabled. If data is transmitted incorrectly, retransmission occurs.
Product Requirements
If connecting to an IBM mainframe
o SNA/SDLC Link/iX requires an IBM System/370 or compatible mainframe
(Model 370, 30xx, or 43xx) with an IBM 37xx or compatible
communications controller. The following software must be running on
the host and communications controller:
- MVS/SP, MVS/XA, MVS/ESA, VSE, or VM
- ACF/VTAM
- ACF/NCP
If connecting to an IBM AS/400
o SNA/SDLC Link/iX requires an IBM AS/400 running OS/400 Version 1.2 or
later operating system.
HP will support certain versions, releases, modifications, and PTF
levels of the above software. Your HP Sales Representative or System
Engineer can determine whether SNA/SDLC Link can be supported with your
particular configuration. The Network Implementation Support Plan
(NISP) will help the customer engineer determine support requirements in
advance for the particular network.
o A terminal supported by V/3000 (in addition to the system console) is
required for the HP 3000 Node Management software.
o A switched or nonswitched data communications line is required between
the SNA/SDLC Link and the host communications controller.
o An external clock signal must be provided for operation at 64 Kbps.
SNA/SDLC Link/iX Product Requirements
o An HP 3000 Series 900 computer system
o MPE XL Release 2.2 or MPE iX Release 4.0 or later operating system.
For AS/400 connectivity, MPE iX Release 4.0 or later is required.
Installation and Configuration Policy
The customer is responsible for loading the SNA/SDLC Link/iX software
onto the system.
Hewlett-Packard will install the PSI card and perform minimum
configuration of SNA/SDLC Link/iX in order to verify minimum product
functionality. This activity is included in the product purchase price.
Customer Responsibility
Prior to having HP personnel onsite to install the PSI card and perform
minimum configuration of SNA/SDLC Link/iX, the customer is responsible
for the following:
o Providing HP with the information necessary to complete the Network
Implementation and Support Plan (NISP) including:
- System configurations
- Logical network map identifying relevant traffic flow
- Physical network map identifying relevant network hardware
components.
o Installing a switched or nonswitched line between the HP 3000 system
and the communications controller on the host system - with a matched
pair of synchronous modems that are certified for use with HP 3000
systems at each end of the line.
o Conducting the appropriate tests to ensure that the line and modems
are functioning properly.
o Verifying that the necessary host mainframe software is installed and
configured to support SNA/SDLC Link/iX. The customer should contact
their HP Sales Representative for typical host parameter values or
consult the "HP SNA Products: ACF/NCP and ACF/VTAM Guide" (5958-8543)
for details.
o Updating the HP 3000 system to the proper release level and installing
the SNA/SDLC Link/iX software using AUTOINST. Refer to the HP 3000
MPE iX Update Manual (36123-90001).
o Verifying that all of the necessary software modules have been
successfully installed by AUTOINST and are at the correct version
levels using the NMMAINT.PUB.SYS utility.
o Performing full system backups as necessary and ensuring that the
HP 3000 system and personnel with HP 3000 system management knowledge
are available when HP is onsite to complete the PSI card installation
and perform minimum configuration of SNA/SDLC Link/iX.
The customer is also responsible for completing the configuration in
order to fully integrate SNA/SDLC Link/iX into the existing customer
network after HP has completed the minimum configuration of SNA/SDLC
Link/iX.
HP Responsibility
Following the installation of SNA/SDLC Link/iX, HP is responsible for
the following:
o Installing and verifying the PSI card for SNA/SDLC Link/iX.
o Connecting the SNA/SDLC Link/iX hardware to the customer's
communication line (only if available at installation time).
o Confirming that all of the necessary software modules have been
installed and are at the correct version level.
o Configuring the SNA/SDLC Link/iX product to a minimum configuration (l
PU and 1 LU) in order to verify software and hardware functionality.
o Verifying the SNA/SDLC Link/iX configuration by issuing the SNACONTROL
START command and ensuring that the PU to SSCP session becomes active.
These steps complete HP's portion of the installation and minimum
configuration of SNA/SDLC Link/iX.
Additional Implementation Assistance
For implementation needs that go beyond installation, the customer can
either provide self-support, or can purchase additional services from
HP. These services include Network Startup and HP ConsultLine. In
addition, the customer can also purchase service from HP on a
time-and-materials basis.
Network Startup includes implementation scheduling and coordination
assistance, network configuration and verification testing, and network
documentation.
System Environment
SNA/SDLC Link/iX is available on the HP 3000 Series 900 with MPE XL
Release 2.2 or MPE iX Release 4.0 or later (MPE iX Release 4.0 or later
for IBM AS/400 connectivity).
Note: SNA/SDLC Link does not support user access to its intrinsics.
See your local HP office for information about an HP special product for
this purpose.
Ordering Information
30291A SNA/SDLC Link/iX requires service contract for hardware.
Select one PSI option AND one cable option AND one User License option.
The User License Option must align with the MPE iX License. Upgrade
credits may be used where applicable.
PSI Options:
001 Central Bus PSI (for HP 3000 CIO systems)
002 Precision Bus PSI (for HP 3000 NIO systems)
090 No PSI (software only)
Cable Options:
010 RS-232 connection
020 V.35 connection
025 RS-232 auto-dial connection
099 No cable (software only)
User License Options:
OAF 20-user license
UCY 40-user license
UA9 64-user license
UBD 100-user license
UCN 160-user license
UAT Unlimited user license
Upgrade Credit Options:
UD8 Credit for 20-user license
UCZ Credit for 40-user license
UB9 Credit for 64-user license
UD9 Credit for 100-user license
UDV Credit for 160-user license
UBP Credit for Unlimited user license
OCD Credit for Processor Option 310
OGJ Credit for Processor Option 315
OCE Credit for Processor Option 320
OCF Credit for Processor Option 330
OGL Credit for Processor Option 335
OGM Credit for Processor Option 340
UEK Credit for Processor Option 350
In order to receive the upgrade credit, customers must select the
upgrade credit option that pertains to their current processor/user
license option in addition to the new user license option on the same
order.
Support Products
HP offers a spectrum of support service products to help plan,
implement, operate, and manage your multivendor network throughout the
network lifecycle.
For more information, contact your HP Sales Representative, or refer
to the HP data sheets for specific support services.
Documentation
For SNA/SDLC Link/iX:
30291-61000 SNA Link/iX Node Manager's Guide
From HP Networking Communications Specification Guide, 5091-3821E, 9205
modified 9307, p 414
Associated files: la3821bs.plt, la3821bs.gal, a3821395.doc
SNA/SDLC Link/iX, Technical Data