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Rules of Thumb
NetWare SNA Gateway
Novell has strived to make the NetWare SNA Gateways reliable, efficient and easy to use. To aid you in
configuring the NetWare SNA Gateway for optimal reliability and performance, we asked our engineers what
components they would use if they were installing the product. Here's what they said:
PROTOCOLS AND ADAPTERS
The NetWare SNA Gateway works with the Novell SPX/IPX and the IBM NetBIOS protocols. We recommend
using SPX/IPX. We also recommend you that you use personal computers and LAN adapters from the
recommended list included in this document, as each has been tested thoroughly with the gateway.
COAX CONNECTION
A Coax connection supports up to five host sessions. We recommend any personal computer and appropriate
LAN adapter from the list in this document. The gateway can operate in nondedicated mode in any workstation
on the LAN (to reduce cost). However, when used in nondedicated mode, the gateway is at the mercy of the
workstation user and susceptible to rebooting by using <CTRL-ALT-DEL>.
COAXMUX CONNECTION
A CoaxMux connection supports 40 host sessions. Use any personal computer and appropriate LAN adapter
from the list of tested hardware in this document. Use the Novell CoaxMux Adapter for the host connection.
We recommend that the gateway run in dedicated mode for optimal performance and reliability.
REMOTE CONNECTION
The NetWare SNA Gateway ELS Remote supports up to 16 host sessions and the NetWare SNA Gateway Remote
supports up to 128 sessions. For a connection with up to 16 sessions, use a personal computer and appropriate
LAN adapter from our recommended list. Use the Novell Synchronous Adapter for a PC bus configuration or
the IBM MPA (Multiprotocol Adapter) for a microchannel bus configuration. This gateway configuration may
operate in nondedicated mode on any workstation on the LAN (to be more cost effective). However, be aware
that when used in nondedicated mode the gateway is at the mercy of the workstation user and susceptible to
rebooting by using <CTRL-ALT-DEL>. We recommend that this gateway be run in dedicated mode.
NOTE: When using a microchannel computer and the IBM MPA, IBM recommends that the maximum line speed
be no greater than 19.2 Kbps.
For connections to an IBM host with up to 128 sessions, the best performer is a 386 based PC and appropriate
LAN adapter from our recommended list. Use the Novell Synchronous/V.35 Adapter to operate at speeds up to
64 Kbps or the Synchronous Adapter for speeds up to 19.2 Kbps. These configurations can support up to 97
LAN workstations and 128 host sessions, but for maximum performance configure only for the number of host
sessions required. With fewer host sessions supported, more memory and processing power is available to
operate the gateway. For optimal performance and reliability, run this gateway in dedicated mode. When used
in nondedicated mode, the gateway is at the mercy of the workstation user and susceptible to rebooting by using
<CTRL-ALT-DEL>.
TOKEN RING HOST CONNECTION
A Token Ring connection supports up to 128 host sessions. This option allows you to connect directly through
the IBM host Token Ring interface. The interface can be on a 3174 controller, a 37xx communications
processor, or a 9370 host processor. This option is a great way to connect workstations on Token Ring networks
or non-Token Ring LANs directly to the IBM Token Ring Interface for a high performance host connection.
The best gateway performer for this connection is a 386 based Personal computer and appropriate LAN adapters
from our recommended list. We recommend an IBM Token Ring Adapter for the host connection. This
configuration can support up to 97 LAN workstations and 128 host sessions, but for maximum performance
configure only for the number of host sessions required. With fewer host sessions supported, more memory and
processing power is available to operate the gateway. For optimal performance and reliability, run this gateway
configuration in dedicated mode.
Special performance hint: When connecting Token Ring workstations through the Gateway, use two Token Ring
adapters, one to handle the LAN traffic and one to handle the host interface. This configuration will provide
optimal performance. Configuration guidelines are as follows:
CONFIG.SYS using IBM LAN Support Program 1.1
One Token Ring Card Configuration:
DEVICE=DXMC0MOD.SYS 4000XYYYYYYY
Two Token Ring Cards:*
DEVICE=DXMC0MOD.SYS ,,,4000XYYYYYYY
Note: 4000XYYYYYYY refers to the locally administered ring address of the gateway. Please see the NetWare
SNA Gateways Administration Guide for details.
* Three commas signifies the use of the IBM 16/4MB Token Ring card. Use two commas for the IBM 4MB
Token Ring card.
Special configuration hint: The NetWare SNA Gateway can connect a non-Token Ring LAN to a token ring
connected host by using both a token ring and the appropriate non Token Ring LAN adapter (such as Ethernet)
in the Gateway machine. The Token Ring board should be configured as the secondary adapter.
AS/400 TOKEN RING CONNECTION
An AS/400 Token Ring connection supports up to 64 host sessions. This connection provides LAN connectivity
to an IBM AS/400 host computer directly through the IBM Token Ring interface. The recommendations that
apply to this connection are described in the previous section, TOKEN RING HOST CONNECTION. In
addition, the following guidelines will help you in the installation of the gateway.
The NetWare SNA Gateway is supported through the IBM AS/400 3270 Remote Attachment Feature. IBM
3278/79 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:
o The display has the appearance of a 5250 terminal with a 3270 status line.
o Certain terminal features, such as the Field Exit key, are not supported. Refer to the NetWare SNA Gateway
Administration Guide for more information on these terminal features.
o The AS/400 does not support concurrent LU2 (3270 emulation) and LU6.2
(APPC) sessions through a single gateway.
o The IBM 5250 API is not supported. Thus, applications written to this API will not be supported.
o Additional AS/400 memory may be required to attach the SNA Gateway to the AS/400. Consult your IBM
Systems Engineer regarding performance and memory requirements.
The following IBM AS/400 applications have been tested with the NetWare SNA Gateway:
o IBM OfficeVision/400
o IBM AS/400 Query
HARDWARE AND SOFTWARE RECOMMENDATIONS FOR NETWARE SNA GATEWAY PRODUCTS
The following is a list of personal computers and LAN adapters that have been tested in the listed environments.
We recommend them for use with NetWare SNA Gateways as gateway servers. Each configuration has been
tested extensively with SFT NetWare 2.15 and NetWare 386, the IBM PC Local Area Network Program with the
listed adapters, and representative user software.
At the time of publication we are unable to recommend the use of the Epson Equity 1+ and 3+ as gateway server
machines, as each has failed to perform consistently during initial testing. We also do not recommend the use of
third party vendor's IPX software such as SmartIPX from Madge Networks, Inc.
The SNA Gateway connections tested for a PC bus environment include Coax, Remote, CoaxMux, and Token
Ring. The connections tested for a microchannel architecture bus environment include Coax, Remote, and Token
Ring.
STANDARD TEST BED ENVIRONMENTS
Local Area Networks for SPX:
SFT NetWare v. 2.15
NetWare 386 v. 3.0/3.1
Local Area Networks for NetBIOS:
IBM/MS-DOS 3.3/4.0, or COMPAQ DOS 3.31 was used on all nodes when applicable.
IBM LAN Support Program 1.1
CONFIGURATION NOTES
The Ethernet IRQ must be changed from 3 to 9 when used with an IBM Multi- protocol Adapter because the
Multiprotocol Adapter also uses IRQ 3. Use the Change Configurations option of the System Reference
Diskette. When using the IBM LAN Support Program with NetBIOS, a workstation CANNOT be loaded on top
of the gateway server.
If you are using a VGA card, you may need to verify your memory addresses.
220K of memory must be available on the LAN workstation when using Word 4.0. When you return from a host
session while using Word 4.0 in Graphics mode, you must press <Alt-F9> to regain the Word 4.0 screen.
In order to restore a Lotus 1-2-3 Graphics Display after hotkeying back from a host session, enter /s to take you
to a DOS prompt. From the DOS prompt, type EXIT.
USER SOFTWARE TESTED WITH NETWARE 3270 LAN WORKSTATION SOFTWARE
Lotus 1-2-3 NetWorker 2.01
Microsoft Word 4.0
SideKick
WordPerfect 5.0/Office
NetWare 3270 Send-Receive program with both IND$FILE and NVL$FILE
IBM DisplayWrite 4
XCOM 6.2 File Transfer
RECOMMENDED HARDWARE FOR PERSONAL COMPUTER BUS ENVIRONMENT
Computers
ACER 900S1
ACER 910B1
AST 386/33
COMPAQ Systems (all models)
{Deskpro 386/25: For remote connections use memory address C0 or C4, as RAM uses
B8-C0.}
{Deskpro 386s: Memory addresses C0 and C4 cannot be used for gateway configuration.
Everex Step 386/33
IBM AT 286
NCR 386-916
NEC Powermate 386/25
Novell 386a
Novell 386ae
Toshiba 3200
Wyse 386/25
Zenith 386
LAN Adapters
3Com EtherLink 3C505
3Com EtherLink 3C503
ACER Ethernet
IBM Token Ring Adapter
IBM Token Ring Adapter II
IBM Token Ring 16/4
Novell NE-1000
Novell NE-2000
Proteon ProNET Model p1344
RX-Net
Standard Microsystems Arcnet
3270 Adapter Boards
IBM 3270 Coax Adapter
IBM Token Ring Adapter
IBM Token Ring Adapter II
IBM Token Ring 16/4
Novell Coax Adapter for PC
Novell CoaxMux Adapter for PC
Novell Synchronous Adapter for PC
Novell Synchronous/V.35 Adapter for PC
RECOMMENDED HARDWARE FOR EISA BUS ENVIRONMENT
Personal COMPAQ SystemPro 386/33 Computers
COMPAQ 32-bit Dual Speed LAN Token Ring Adapter
RECOMMENDED HARDWARE FOR Microchannel BUS ENVIRONMENT
Computers
ALR 486/25
PS/2 Model 50
PS/2 Model 50Z
PS/2 Model 50SX
PS/2 Model 60
PS/2 Model 70A21
PS/2 Model 70E61
PS/2 Model 80
LAN Adapters
3Com Etherlink/MC3C523
IBM Token Ring Adapter /A
IBM Token Ring Adapter II/A
IBM Token Ring Adapter 16/4/A
Novell NE/2
DISPLAY ADAPTERS FOR ALL ENVIRONMENTS
Model 3 & 4 Model 5
Ahead Systems VGA Enhancer VGA Yes
Ahead Systems EGA Wizard/Deluxe EGA Yes
California Computer Systems Supervision No Yes {1}
Compaq VGA VGA Yes {2}
Genoa Super EGA Hi Res+ 4850-7 EGA No
IBM VGA VGA Yes {2}
Paradise Auto Switch EGA 350 EGA {3} No
Paradise VGA Plus VGA {3} Yes {2}
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 {1}
Vega VGA Video Seven VGA Yes {2}
{1} Requires loading of M5MONO before loading the workstation
{2} Tested with a NEC MultiSync 3D monitor. Requires loading M5MULTI prior to loading workstation.
{3} May give unwanted results if used in conjunction with a mouse driver.
MEMORY MANAGEMENT SOLUTIONS
For the Gateway > RYBS HICard
For the Workstation > Helix Software Connecting/ROOM
> SoftLogic Carousel/Ole (NetBIOS only)
LAN Adapters Scheduled for Testing
Novell NE 2/2
Software Scheduled for Testing
Above Software Above Disk
GUPTA SQL Gateway/APPC
LAN Systems LANSpace
Merrill & Bryan Utility Shuttle