Ref: 09720001
Title: Release Note: CS/100 booting from NCS/AT ver. 20060
Date: 12/22/87

Copyright 3Com Corporation, 1991.  All rights reserved.

Enclosed is a distribution diskette containing SW/100-A/BSC-
NCS/AT Version 20060, which is for CS/100s that are booted from
an NCS/AT.

This release memo contains the instructions for installing
software on the NCS/AT.  It also describes the new features of
and bugs fixed in SW/100-A/BSC.

Compatibility

SW/100-A/BSC-NCS/AT Version 20060 can operate with the following
products and software releases:

CS/1-X.25 running SW/1-X.25 Version 14000 or later
CS/1 running SW/1-A/BSC/SDLC Version 17100 or later
CS/1-HSM running SW/1-HSM Version 11010 or later
CS/1-SNA running SW/1-SNA Version 10000 or later
CS/200 running SW/200-A Version 20000 or later
GS/1 running SW/2-CS-ICS Version 14000 or later
GS/3 running SW/3 Version 14000 or later
GS/4 running SW/4 Version 10000
GS/6 running SW/6 Version 10000 or later
GS/300 running SW/300 Version 10000 or later
IVECS running SW/IVECS-A Version 10000 or later
NCS/150 running SW/150-NCS Version 10000 or later
NCS/1 running SW/1-NCS Version 10010 or later
NCS/AT running SW/AT-NCS Version 11000 or later
Personal computer running EtherTerm Version 12000 or later
Personal computer running SW/4-PCS Version 10000 or later

Table 1 illustrates the software and firmware compatibility for
SW/100-A/BSC-NCS/AT Version 20060.

.LT
_______________________________________________________________
|           Table 1  Software/Firmware Compatibility           |
|______________________________________________________________|
|   Product   |     Software   |            Firmware           |
|             |                |                               |
|             |                |        SIO             MP     |
|_____________|________________|_______________________________|
|  CS/100-A   |   SW/100-A/BSC |   SDL Rev. 4        T1MMON 1B |
|             |                |   T0ASYN 5C         or later  |
|             |                |   or later                    |
|             |                |   T1ASYN 1B                   |
|             |                |   or later                    |
|_____________|________________|_______________________________|
|             |                |                               |
|  CS/100-BSC |   SW/100-A/BSC |   SIOBSC Rev. 1     T1MMON 1B |
|             |                |   or later          or later  |
|             |                |                               |
|_____________|________________|_______________________________|
.EL

Installation

Use the following procedure to install SW/100-A/BSC-NCS/AT
Version 20060 on the NCS/AT:

1.  Follow the instructions in the NCS/AT Installation and
Operation Guide to log in to the NCS/AT.  A command prompt
appears on the screen after you have logged in.

2.  Insert the SW/100-A/BSC-NCS/AT Version 20060 diskette in
the disk drive of the NCS/AT.

3.  At the command prompt, type: utility floppyread The
Floppyread utility copies the software from the SW/100-
A/BSC diskette to the NCS/AT disk.

4.  As the file is copied to the disk, its name is displayed on
the screen.  If floppy read errors or disk write errors occur,
remove and replace the diskette; then repeat the procedure
starting at step 2.

If read or write errors continue to occur, or if other
error messages appear, contact an authorized Bridge service
representative for assistance.

5.  When the file has been successfully copied, the command
prompt appears.  Remove the diskette and store it in a safe
place.

6.  For each CS/100 that is to be booted from the NCS/AT, use
the BInd command to bind the server to the NCS/AT.  Refer
to the NCS/AT Installation and Operation Guide for further
information on the BInd command.

Because SW/100-A/BSC-NCS/AT Version 20060 is stored on a 96 TPI,
double-sided, high-density diskette, you must use the same type
of diskette if you are making a copy of the distribution
software.

New Features

The following features, which were not present in SW/100-A/BSC
Version 20050 or earlier, have been implemented in SW/100-A/BSC-
NCS/AT Version 20060:

1.  In addition to the SETDefault command, the SET command can
be used to alter the buffer size of an individual port.
For instance, to change the current buffer size of a port
to 56 bytes, type: set BUffersize = 56 To change the buffer
size of the host, the REMoteSET command can be used with
the same syntax shown above.

Setting the buffer size to be smaller than the system
buffer size, which is usually 82 bytes, actually creates a
buffer of the specified size.  If the specified value is
greater than the system buffer size, more buffers of the
system buffer size are created instead of a bigger buffer.

The SET command does not take effect immediately during a
session.  The additional buffers created by the command are
not used until the buffers currently allocated to the port
have been exhausted.

2.  The default interval between audit trail messages sent to
the NCS is now 4 seconds.  Previously, the default interval
was 90 seconds.

The four-second timer can be sysgenned.  This is done by
modifying the Statistics Monitor timer value.  Please refer
to the Configuration Guide for further information.

3.  The server accepts from the netmap packet a clock value
that is lower than the current value.  For example, if the
clock on the NCS is set back to year 1970, all the system
clocks of the servers on the network are changed within 45
seconds to this new value.

Bugs Fixed

The following problems, which existed in SW/100-A/BSC Version
20050 or earlier, have been corrected in SW/100-A/BSC-NCS/AT
Version 20060:

1.  The audit trail records now show the actual number of
rotary ports used.  In the past, the rotary ports used
count was always zero according to the audit trail records.

2.  It is no longer possible for a port to be trapped in the
WAIT-FOR-CONNECT state forever or for the permanent virtual
circuit to suddenly stop working.

3.  The data link drivers can now detect all known deadlock
situations properly.  Running the servers on a noisy
network does not crash the servers or cause the servers to
drop from the netmap.

Known Problems

The following is a list of current problems in SW/100-A/BSC
Version 20060:

1.  If you have not updated all of your CS/100s to SW/100-A/BSC
Version 20000 or later, a connection from a CS/100 that
runs SW/100-A/BSC Version 17100 or Version 18610 to a
CS/100 that runs SW/100-A/BSC Version 20000 or later may
cause a delay of approximately four seconds.

2.  If the FlowControlTo and FlowControlFrom parameters are
both set to None, resetting one of the parameters to
XonXoff or EnqAck causes the other to be automatically set
to XonXoff or EnqAck.

3.  Due to a memory limitation, the SHow CONFiguration and SHow
MACro commands no longer display output in alphabetical
order.

Documentation

For further information on the CS/1 and network planning, refer
to the following manuals:

Series/100 Installation Guide (10/85)
(Part Number: 09-0023-02)

Connection Service User's Guide (11/87)
(Part Number: 09-0063-02)

Network Management Guide (9/87)
(Part Number: 09-0067-02)

Configuration Guide (1/87)
(Part Number: 09-0093-00)

Getting Started Guide (2/87)
(Part Number: 09-0043-01)

NCS/AT Installation and Operation Guide (9/87)
(Part Number: 09-0092-01)
