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1992-03-16
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Rules of Thumb for NetWare for SAA
October 31, 1991
NetWare for SAA running on a NetWare v3.11 server provides comprehensive
LAN to IBM host connectivity. Information to aid you in configuring
NetWare for SAA for optimal reliability and performance is shown below.
Supported host connections, LAN protocols, hardware and software
recommendations for NetWare for SAA and the NetWare 3270 LAN Workstation
for DOS are also covered.
SUPPORTED CONFIGURATIONS
NetWare for SAA is a set of NetWare Loadable Modules (NLMs) that run on top
of the NetWare v3.11 operating system. NetWare for SAA can be installed to
run on a single server with other NLMs such as file, print, and messaging
services, or on a server dedicated to communications.
NetWare for SAA supports:
> Up to 508 concurrent host sessions (two of which are used by NetWare
for SAA leaving 506 user sessions) from a single server. The sessions
can be any combination of display, printer, or Advanced Program to
Program Communications (APPC) sessions.
> Synchronous Data Link Control (SDLC) and token ring connections to
the host.
> PU 2.0 and PU 2.1 connections to hosts and PU 2.1 connections
between LAN workstations.
NetWare for SAA is sold in 16, 24, and 254 session configurations. Two
copies of a NetWare for SAA product can be installed on the same server to
double the numnber of supported sessions (ie. two 64 session products = 128
sessions).
Multiple PU Configurations
--------------------------
NetWare for SAA will support two concurrent host connections from a single
NetWare for SAA server. Multiple host connections can be used to provide
access to two different hosts from a single NetWare v3.11 server. The two
host connections can include a connection to an AS/400 minicomputer and a
second connection to a mainframe. You can install adapters for two host
connections of the same type (for example, two token ring host connections)
or you can install adapters for host connections of different types
(for example, one SDLC and one token ring host connection).
Multiple host connections can also be used to increase the number of
supported sessions from a single NetWare v3.11 server to a single host.
By purchasing two NetWare for SAA packages and utilizing two host
connections to the same host, you can double the number of host sessions
available from a single NetWare v3.11 server.
Utilizing multiple host connections does not require purchasing multiple
copies of NetWare for SAA. You can make use of two host connections as long
as the aggregate number of configured sessions does not exceed the total
number of sessions you have purchased. For example, if you purchased a
single NetWare for SAA - 64 product, you can configure two host connections
each supporting 32 host sessions.
LAN Configurations
------------------
Workstations can access the NetWare for SAA server using any of the LAN
topologies supported by NetWare v3.11 (ARCnet, Ethernet, Token Ring, and
LocalTalk). A NetWare v3.11 server running NetWare for SAA can coexist
with NetWare v2.x servers on the same network.
Using a SDLC Host Link
-----------------------
NetWare for SAA can be connected via an SDLC host link to a 37xx
communications processor, a 9370 host processor, or an AS/400.
Two SDLC cards can reside in one server, allowing concurrent access to two
remote hosts.
NetWare for SAA supports the following SDLC adapters:
- NetWare for SAA Synchronous Adapter
- Novell Synchronous Adapter
- Novell Synchronous/V.35 Adapter
- IBM Multiprotocol Adapter/A
We recommend the NetWare for SAA Synchronous Adapter because it supports
speeds up to 64Kbps in either a PC or an MCA configuration. The NetWare for
SAA Synchronous Adapter ships with 2 cables.
Use the RS-232 cable for speeds up to 19.2 Kbps, and use the V.35 cable for
speeds above 19.2 Kbps up to 64 Kbps.
Note: When using a microchannel computer and the IBM Multiprotocol Adapter,
IBM recommends that the maximum line speed be no greater than 19.2 Kbps.
Using a Token Ring Host Link
----------------------------
NetWare for SAA can be connected via a token ring host link to a 3174
controller, a 37xx communications processor, a 9370 host processor, or an
AS/400. It supports the IBM Token Ring Adapter 16/4 for ISA configurations
and the IBM Token Ring Adapter 16/4/A for microchannel bus configurations.
Two token ring cards must be used for configurations involving two host
connections.
Recommended Configuration
-------------------------
When using token ring for both LAN connections and the host connection, we
recommend two token ring adapters:
- one to handle the LAN traffic
- one to handle the host interface.
One adapter could be used, but this configuration will provide optimal
performance.
CONNECTING TO AN AS/400
-----------------------
NetWare for SAA provides connectivity to an IBM AS/400 host computer via
token ring and SDLC. The recommendations that apply to these connections
are described in the previous section. In addition, the following
guidelines apply to an AS/400 host connection.
An AS/400 connection is supported through the IBM AS/400 3270 Remote
Attachment Feature. IBM 3278/79 (LU Type 2) display and IBM 3287 (LU type
1) printer emulation is supported. Chapter 13 of the IBM AS/400
Communications User Guide describes how the capability differs between a
3270 device attached to an AS/400 and a 5250 device in an AS/400
environment. Some of the primary differences are:
- The display has the appearance of a 5250 terminal with a 3270 status
line.
- The keyboard layout of a NetWare 3270 LAN Workstation differs from a
conventional 5250 emulation keyboard layout, and some display
attributes are not supported. Refer to the appendix "AS/400 Support"
in the NetWare 3270 LAN Workstation for DOS Configuration Guide and
the NetWare 3270 LAN Workstation for Macintosh User's Guide for
information on remapping your keyboard to a 5250 keyboard layout and a
listing of the display attributes that are not supported.
- The AS/400 does not support concurrent LU2 (3270 emulation) and
LU6.2 (APPC) sessions through a single host connection. Two host
connections are needed to support both LU 6.2 and LU 2.
- The IBM 5250 Application Program Interface (API) is not supported,
so applications written to this API will not work.
- NetWare for SAA does not support the IBM AS/400 PC Support program.
Additional AS/400 memory may be required to attach the NetWare for SAA to
the AS/400. Consult your IBM systems engineer regarding performance and
memory requirements.
Supported LAN Protocols
-----------------------
NetWare for SAA supports the Sequenced Packet Exchange/Internetwork Packet
Exchange (SPX/IPX) and AppleTalk network transport protocols. NetWare for
SAA can be accessed from workstations located anywhere on an enterprise
network comprised of multiple interconnected LANs.
Performance Comparisons
-----------------------
The following illustration shows the percentage of improvement in file
transfer performance of a NetWare for SAA configuration over a NetWare SNA
Gateway configuration using NetWare 3270 File Transfer 2.0.
Both configurations included a COMPAQ 486L/33MHZ using an NE2000 Ethernet
LAN connection and a 4 Mb token ring connection to an IBM 9370 using the
IBM 16/4 Token Ring Adapter. The following items apply to both
configurations:
- Files were sent using the SEND.EXE program
- IND$FILE was used
CPU Utilization - Standard vs. Dedicated Server Configuration
Shown below is the CPU utilization measured during NetWare for SAA testing
at Novell. This data can be used in your NetWare for SAA configuration
planning when you consider whether to install NetWare for SAA on an
existing NetWare v3.11 server or on a server dedicated to NetWare for SAA.
The data below is a measure of CPU utilization on a server dedicated to
NetWare for SAA. This CPU utilization will be incremental to the CPU
utilization you are currently experiencing on your file server.
The tests were run on an ALR 486/25 MicroChannel server with 8 MB of RAM.
The host connection was a 4 Mb token ring connection. Ethernet was used for
all LAN connections. The application program was run on a 9370 host and
involved sending a new screen comprised of approximately 80 bytes of data
to each workstation once a second.
Note: The CPU utilization data shown below was measured using internal
testing tools. You will not be able to recreate these numbers using the
CPU utilization displayed by the MONITOR.NLM supplied with NetWare v3.11.
Results:
--------------------------------------------
# of Workstations 16 32 64 128
--------------------------------------------
# of LUs 16 32 64 128
--------------------------------------------
MAX CPU Utilization 5% 10% 14% 21%
--------------------------------------------
Memory Requirements
-------------------
If you are using the Runtime version of NetWare v3.11, which ships with
NetWare for SAA, the minimum recommended system memory is 8 MB.
If you are using the standard NetWare v3.11, use the following steps to
determine the memory requirements for running NetWare for SAA.
1. Calculate the memory requirement for each volume.
For each DOS volume:
M =.023 X VOLUME SIZE (in MB) / BLOCK SIZE (default is 4)
For each volume with added Name Space:
M =.032 X VOLUME SIZE (in MB) / BLOCK SIZE (default is 4)
2. Add memory requirements for all volumes.
TOTAL VOLUME MEMORY = Msys: + Mvol1: + Mvol2:
3. Add 2 MB for the operating system and round the value to the next higher
MB. If the total is under 3 MB, use 4 MB for your NetWare v3.11 memory
requirement.
4. Add 4 MB (to run NetWare for SAA) to the value determined in Step 3.
The SET MAXIMUM ALLOC SHORT TERM MEMORY Parameter
-------------------------------------------------
The NetWare SET MAXIMUM ALLOC SHORT TERM MEMORY parameter controls the
amount of memory the operating system can allocate to the Alloc Short Term
Memory pool that stores information such as service request buffers and
user connection information. When running NetWare for SAA, you normally do
not need to increase the Alloc Short Term Memory pool. This parameter can
support values up to 16 MB. The default is 2 MB.
Important Operating Tip
-----------------------
When running NetWare for SAA with NetWare v3.11 in an environment with a
lot of communication activity, you may see system warning messages from the
server indicating that the Alloc Short Term Memory pool has reached its
limit. If this happens, increase the memory pool by increments of 1 MB
until the system warnings no longer appear. In our experience, we have
found that increasing the memory pool to 3 MB has been sufficient.
As you increase the Alloc Short Term Memory pool, you may notice shortages
in other memory pools such as cache buffers. If this occurs, you will need
to increase physical system memory as well. Use the NetWare v3.11
MONITOR.NLM to view the amount of memory allocated to the Alloc Short Term
Memory pool.
System Volume Requirements
--------------------------
Running NetWare for SAA with the Runtime version of NetWare v3.11 requires
a minimum of 20 MB free system volume space for the NetWare v3.11 operating
system files and NetWare for SAA files. Running NetWare for SAA with the
standard version of NetWare v3.11 requires 10 MB of free system volume
space for the NetWare for SAA files in addition to the space required for
NetWare v3.11.
NETWARE FOR SAA HARDWARE RECOMMENDATIONS
----------------------------------------
Server Hardware
---------------
NetWare for SAA should operate on any NetWare v3.11 server platform tested
and approved by Novell's Independent Manufacturers Support ProgramSM
(IMSP). The following is a list of systems that were used for our in-house
testing and passed successfully.
ALR PowerCache 486/25
COMPAQ DeskPro 386/20
COMPAQ DeskPro 386/20e
COMPAQ DeskPro 386/25
COMPAQ DeskPro 386/25e
COMPAQ SystemPro 386/33
COMPAQ 486/33 L
IBM PS/2 70 386
IBM PS/2 70 486
IBM PS/2 80-071
IBM PS/2 80-111
Network Interface Cards
-----------------------
Any network interface card IMSP tested and approved for NetWare v3.11
should operate when running NetWare for SAA. Host token ring connections
require the IBM Token Ring Adapter 16/4 for a standard bus configuration
and the IBM Token Ring Adapter 16/4/A for a microchannel bus configuration.
NETWARE 3270 LAN WORKSTATION FOR DOS HARDWARE RECOMMENDATIONS
DISPLAY ADAPTER MODEL 3 & 4 MODEL 5
--------------- ----------- -------
Ahead Systems VGA Enhancer VGA Yes
Ahead Systems EGA Wizard/Deluxe EGA Yes
Calif.Computer Systems Supervision No Yes*
COMPAQ VGA VGA Yes
Genoa Super EGA Hi Res+ 4850-7 EGA No
IBM 8514 A VGA No
IBM VGA VGA Yes**
Paradise Auto Switch EGA 350 EGA*** No
Paradise VGA Plus VGA*** Yes**
STB Multi RES II EGA No
Taxan Advanced EGA 570 Plus EGA No
Techmar Graphics VGA VGA No
Tseng Labs EVA EGA Yes
Tseng Labs Ultra Pac No Yes*
Vega VGA Video Seven VGA Yes**
* Requires loading of M5MONO before loading the workstation.
** Tested with a NEC MultiSynch 3D Monitor. Requires loadiding M5MULTI
prior to loading workstation.
*** May give unwanted results if used in conjunction with a mouse driver.
NETWARE 3270 LAN WORKSTATION FOR DOS SOFTWARE RECOMMENDATIONS
-------------------------------------------------------------
The following is a list of applications tested with NetWare 3270 LAN
Workstation for DOS software.
IBM DisplayWrite 4 2.0
Lotus 1-2-3
Microsoft Word 5.0
NetWare 3270 File Transfer
Spectrum Concept's XCOM 6.2 File Transfer
Configuration Notes
-------------------
If you run the above applications in graphics mode, you must configure the
Display Adapter Memory for EGA/VGA Graphics under the DOS Session Options
of the NetWare 3270 LAN Workstation for DOS software.
In order to restore the colors of a Lotus 1-2-3 graphics display after
hot-keying back from a host session, enter /s to take you to a DOS prompt
and then type exit.
Memory Management Solutions
---------------------------
Helix Software Connecting/ROOM - software used on the NetWare 3270 LAN
Workstation for DOS - can be used to reduce RAM consumption by the
emulation software.
NetWare 3270 LAN Workstation for Macintosh Hardware Recommendations
-------------------------------------------------------------------
Macintosh Portable, SE, SE/30 and II series with at least 2 MB of RAM.
Supported Keyboards
-------------------
Macintosh keyboards: Standard, Extended, ISO layout (Standard and
Extended), Plus, and Portable 3270 keyboards: Standard, Enhanced and
APL/APL2
NetWare 3270 LAN Workstation for Macintosh Software Recommendations
--------------------------------------------------------------------
Macintosh operating system software version 6.0.3 and above, including
System 7.
The following transport protocols are supported: AppleTalk Phase 1 and 2
network protocols and Token Talk, EtherTalk and LocalTalk physical links.
Utilizes the AppleTalk Data Stream Protocol (ADSP) to communicate with
NetWare for SAA, ensuring that all client-to-server network traffic is
reliably routed through the AppleTalk network.
Configuration Notes
-------------------
The maximum number of Macintosh workstations that can simultaneously access
NetWare for SAA is 127. The maximum number of Macintosh workstations that
can simultaneously access file services on a NetWare v3.11 server is 100.
Novell Part # 101-001127-002