Ref: 99960052
Title: ESD Rel.Note:SW/100-TCP-NCS/AT Ver.3.0 Part#86-0109-00 Rev.03
date: 03-27-89

Copyright 3Com Corporation, 1991.  All rights reserved.

3Com Corporation
Page 1
Software Release
SW/100-TCP-NCS/AT Version 3.0
March 27, 1989

Part Number: 86-0109-00
             Revision 03

TO:  CS/100 Users
FROM: 3Com Corporation
SUBJECT: SW/100-TCP-NCS/AT Version 3.0
DATE: March 27, 1989

Enclosed is a distribution diskette containing SW/100-TCP-NCS/AT
Version 3.0 (Part Number: 83-0048-02).  This software runs on a CS/100
that is equipped with 512 kilo bytes of RAM and is booted from an
NCS/AT.

This release memo describes the procedure for installing the software
on the NCS/AT, the new features, bugs fixed, limitations, and known
problems in this version of SW/100-TCPNCS/AT.

** NOTE **
3Com changed its software version numbering scheme in early 1989.
Instead of  using a five-digit number, such as 20060, 3Com now uses
two- or three-digit  numbers, such as 2.2 and 2.21.  Higher version
numbers represent more recent  releases.  For
example, 2.21 is more recent than 2.2, 2.2 is more recent than  20060,
and 20060 is more recent than 20000.

Compatibility

SW/100-TCP-NCS/AT Version 3.0 operates with the following products and
software re leases:

 CS/1 running SW/1-TCP Version 20000 or later
 CS/1 running SW/20-TCP Version 3.0 or later
 CS/50 running SW/50-TCP Version 3.0 or later
 IB/3 running SW/20-IB Version 11000 or later
 NCS/2 running SW/2-NCS Version 2.0 or later
 NCS/AT running SW/AT-NCS Version 2.0 or later
 CS/200 running SW/200-TCP Version 20000 or later
 CS/210 running SW/200-TCP-CS/210 Version 3.0 or later
 Personal computer running SW/1-PCS Version 20000 or later.

Table 1 illustrates the hardware and firmware compatibility
requirements of SW/100-TCP-NCS/AT Version 3.0:

Table 1  Hardware/Firmware Compatibility

 Product   Boards   PROMS
 CS/100    SIO      T0ASYN 1B or later
 CS/100    MP       T1MMON 2A or later

** NOTE **
You must press the Return key after you type each command described in
this  release memo.

Refer to Chapter 3 of the TCP/IP Connection Service User's Guide for
an  explanation of the notation used in commands referenced in this
release memo.

Installation

If you wish to make a backup copy of SW/100TCP-NCS/AT Version 3.0, use
the floppy copy utility on the NCS/AT.

Also, you must use a blank, 96-TPI, double-sided, high-density
diskette to make the copy.

Before your CS/100 can run SW/100-TCP-NCS/AT Version 3.0, you must
install the software on the NCS/AT that boots the CS/100.

Follow these steps to copy SW/100-TCP-NCS/AT Version 3.0 from the
distribution diskette to the NCS/AT disk:

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

2. Before you load the new image, save the earlier version of SW/100-
TCP-NCS/AT  by typing:

 mv /BIN/cs100t /BIN/cs100t.xxxxx

In this example, "xxxxx" is the version number of an earlier version
of SW/100- TCP-NCS/AT.

3. Insert the SW/100-TCP-NCS/AT Version 3.0 diskette in the disk drive
of the  NCS/AT.

4. At the command prompt, type the following command to list the files
contained on  the diskette containing SW/100-TCPNCS/AT:

 utility floppylist

The list displayed should contain the following files:

 /usr/NCS/BIN/cs100t.3.0 - image
 /usr/NCS/BIN/cs100l- loader
 /usr/NCS/bin/sgn/syncs100t12 - sysgen
 /usr/ncs/local/cmac_install
 /usr/ncs/local/cmac_uninstall
 /usr/ncs/local/cmac_src_unpak
 /usr/ncs/local/cmac_mk_install

The last four files on the above list are conditional macros.

5.  At the command prompt, type the following command:

 utility floppyread

6.  The floppyread utility copies the software from the SW/100-TCP-
NCS/AT diskette  to the NCS/AT disk.

As the files are copied to the disk, their names are displayed.

If floppy read errors or disk write errors occur, remove and replace
the diskette;  then repeat the procedure starting at step 3.

If read or write errors continue to occur, or if other error messages
appear, contact  your network supplier or 3Com for help.

7. After the files have been successfully copied, the command prompt
appears.   Remove the distribution diskette from the disk drive.

Binding Your CS/100 to the NCS/AT

Your CS/100 must be bound to the NCS/AT before it can boot from the
NCS/AT.  Follow these steps to bind your CS/100 to the NCS/AT, using
the new loaderfile option on the NCS/AT.

If your server is already bound to the NCS/AT, start at step 1.
Otherwise, continue on to step 3.

1.  Enter the UNBind command on the NCS/AT by typing:

 unb <address>

 where address is the Internet address of your server.

This command removes your CS/100 from the list of servers bound to the
NCS/AT.

The system prompts you to indicate whether you wish to remove the
client server's  global parameter, Internet address, and configuration
files from the NCS/AT disk.

2.  Type "n" to save your configurations.

3.  Enter the BInd command on the NCS/AT by typing:

 bi <Ethernet address> <Internet add.> -f cs100t.3.0 -l  cs100l
 [<nports>]

This binds the CS/100 to the NCS/AT.  In the above command line, "l"
refers to the  new loaderfile option and cs100l is the loaderfile
name.

If you do not specify the last argument, nports, the NCS/AT creates
port  configurations for the maximum number of ports on your
Communications Server.

New Features

The following features, which were not available in SW/100-TCP-NCS/AT
Version 20000, have been implemented in SW/100-TCP-NCS/AT Version 3.0:

Access control is available on all Communications Servers that are
booted from  local diskettes, NCS/2s, or NCS/ATs.  It is not available
on a Communications  Server that is booted from an NCS/150.

Access control services are provided on the NCS, and supported by your
Communications Server.  Access control is disabled by default but it
can be enabled  from the Sysgen program on your NCS/AT.

The Sysgen program now includes Access Control Parameters and Remote
Access  Parameters to support access control on your CS/100.  Refer to
the section Sysgen  Changes in this release memos for information on
these parameters.

Enabling access control restricts access to the resources on your
network and  prevents unauthorized access to the network and network
resources.

The network manager maintains the access control database on the NCS.
Refer to  the NCS/AT Operation Guide for information on maintaining
the database and on  the new utilities that have been provided on the
NCS for this purpose.

In addition, the following access control parameters and commands have
been  implemented at local network manager privilege level in SW/100-
TCP-NCS/AT  Version 3.0:

The DefaultLoginName parameter specifies the default user login name
assigned  to a host port to which secure connections are made.  This
default user name should  be defined along with other users in the
access control database on the NCS.

Before you can set the DefaultLoginName parameter, you must set the
TermPortDe- Login parameter in Sysgen.

The SECurityServerAddress parameter specifies the Internet address of
the  NCS, which provides user authentication during login and network
access control  services.  If no address is assigned, the address of
the server's File Server is used.

The SHow InternetServers command also shows the address of the
Security  Server on servers that use access control.

The SHow LOgins command shows the name of the user logged in to each
port  on a Communications Server.  The user name is displayed whether
the login is  done by a user or by automatic default login.

The access control service is transparent to network users except for
the following  steps:

 - A user enters a user name and password before attempting to
 establish a connection to a resource.

The user name is entered at the "Network Login:" prompt, which appears
on the screen when the terminal is first powered on, and the password
at the "Password:" prompt.  The PassWord command allows a user to
change his password.

 - A user enters the LOgout command when disconnecting from the
 network.  This command disconnects all sessions and prevents
 unauthorized access to   resources on the network.

If a user tries to connect to a resource to which he does not have
authorized access,  the following error message is displayed:

Access to resource denied

A new parameter, # of keep alive packets, has been added to the TCP
Parameters Menu in Sysgen.  This parameter determines the number of
packets  transmitted to maintain a connection before it is terminated.
The possible values of  this parameter
are from 0 through 10 (hexadecimal) and the default value is 0.

For example, if this parameter is set to 8, the connection is
terminated after eight  keep alive packets have been sent.  When this
parameter is set to 0, the connection  is maintained indefinitely.

Keep alive packets are sent at intervals of from 45 to 60 seconds.

Another new parameter, maximum window size, has been added to the TCP
Parameters Menu in Sysgen.  The maximum window size parameter enables
you to  change the window size for transmission and reception.  The
default window size is  1,024 bytes.
This parameter can be set to hexadecimal values from 1 to 1000.

A new set of audit trail messages has been implemented for
Communications  Servers that use access control.

The audit trail record codes, IX for ICMP transmitted and IR for ICMP
received,  now display more information to aid in network fault
analysis.

Refer to the NCS/AT Operation Guide for a description of the revised
audit trail  messages and record codes.

Additional features have been provided to support Hewlett Packard
devices.  These  include default parameter settings, context-sensitive
flow control, and spare XON  forwarding.

The SHow SESsion command has a new option, M.  This option displays
the  Internet address and the TCP port number on the destination side
of a connection.  The new syntax for the SHow SESsion command is as
follows:

 SHow (!<port number>) SESsion M

For example, if you enter this command:

 sh (!1) ses m

the screen display generated is similar to the following:

 CONCTD from 192.9.205.071:099:006

This display shows that the host server is connected from port 6 of a
Communications Server with the address of 192.9.205.071.  The number
immediately following the Internet address ("099" in this example) may
be  disregarded.

This feature only works if the destination server is a Communications
Server  manufactured by 3Com.

In accordance with the latest updates in the TCP/IP implementation of
the Berkeley  release 4.3 of the UNIX operating system, this version
has implemented  retransmission and round-trip algorithms, delayed
acknowledgements, superior  silly-window
avoidance behavior, and improved timer handling and disconnection
procedures.

The effects of these implementations include higher data throughput
and more  reliable connections.

When entering commands in remote mode, the response timeout period has
been  increased from 12 to 28 seconds.  This is particularly useful
for Communications  Servers that are booted from an NCS/2, which often
requires a response time of  more than 12 seconds.

The LongBReakAction parameter is now available for both host and
terminal ports.  Previously this parameter could not be set for host
ports.  For more information on  this parameter, refer to the TCP/IP
Connection Service User's Guide.

Sysgen Changes

Two new options have been added to the Sysgen program to support
access control on your CS/100.

Invoke the sysgen utility on the NCS/2 by typing the following
command:

sysgen cs100t.3.0

The main sysgen menu is displayed.

The new options, Access Control Parameters and Remote Access
Parameters, have been added to the Module Select Menu in the Sysgen
program.  The following is the new mod ule select menu:

Module Select Menu

1. Kernel Parameters

2. Data Link Parameters

3. IP Parameters

4. TCP Parameters

5. User Interface Parameters

6. Virtual Terminal Parameters

7. Statistics Monitoring Parameters

8. Service Listener Port List

9. Access Control Parameters

A. Remote Access Parameters

(ESC to return to main menu) Select module:

Access Control Parameters

Select 9 from the Module Select Menu to display the Access Control
Parameters menu.  The following menu is displayed:

 Access Control Parameters

 Parameter     Current Value

 1. Acs Ctl Enable(0=Dis, 1=Ena) 0x0
 (ESC to return to previous menu)
 Enter selection:

Type "1" at the "Enter Selection:" prompt to enable access control.
Enabling access control restricts access to the resources on your
network and prevents unauthorized access to the network and network
resources.  Access control is disabled by default.

Remote Access Parameters

The remote access parameters allow you to restrict the addresses of
devices that can access your Communications Server with the REMOTE
command.

You can allow all devices, a group of devices, or individual devices
to have remote access.

Select A from the Module Select Menu to display the Remote Access
Parameters Menu:

 Remote Access Parameters
 1. Access Level  (Any device)
 2. Enter Device Addr here
 (ESC to return to previous menu)
 Enter selection:

The possible values of the Access Level parameter are as follows: the
address list consists of individual device addresses defined by the
Enter Device Addr here option on the Remote Access Parameters menu.

 any device
 address list only
 address list plus subnetwork
 address list plus network

Select item 1 from the Remote Access parameters to set this parameter.
The screen  prompts as follows:

 (ESC to return to previous menu)
 Enter selection:
 Choose 0(any), 1(address list), 2(also subnet) or 3(also  network):

 - Select 0 to grant access to all devices on the network. This is the
 default  value.
 - Select 1 to allow only those hosts listed in the address list to
 access the Communications Server.
 - Select 2 to allow all devices specified in the address list as well
 as all devices on the local subnetwork to access the Communications
 Server.
 - Select 3 to allow all devices specified in the address list and all
 devices on the local network to access the Communications Server.

Select item 2, Enter Device Addr here, to define the addresses in the
address list.  The system displays the following:

 Enter an IP address:

If you enter a valid Internet address, the new address and the value
of the access  level parameter appear on the screen and you are
prompted to add the next address.

For example, if you enter the valid Internet address 192.9.200.34, the
following is  displayed:

 Remote Access Parameters
 1. Access Level   Address List
 2. Device IP addr 1  192.9.200.34
 3. Enter Device Addr here
 (ESC to return to previous menu)
 Enter selection:

You can specify up to three addresses on the address list.  The system
automatically  numbers and lists the device addresses as you enter
them.

For example, if you define three addresses, the screen display will be
similar to the  following:

 1. Access Level   Specified Addresses
 2. Device IP addr 1   192.9.200.45
 3. Device IP addr 2   192.9.201.33
 4. Device IP addr 3   192.9.201.22

The address list consists of the three addresses listed above.  To
delete a device  address from the address field, select option 2, 3,
or 4 and then enter 0.0.0.0 or x  in the address field.

If you wish to prevent all devices from accessing the Communications
Server with  the REMOTE command, set the Access Level Parameter to
Address List, and check  that there are no entries in the address
list.

Bugs Fixed

Certain problems, which existed in previous versions of SW/100-TCP-
NCS/AT, have been solved in SW/100-TCPNCS/AT Version 3.0.  These
problems and their resolutions are described below.

If you attempt to save default port parameters in a non-numbered file
and you do  not have global network manager privilege level, the
system now displays the error  message "Insufficient privilege" after
you enter the SAve command.

Previously, this message or the system prompt was not displayed until
you pressed  the Break key.

Only a global network manager can save default port parameters in a
non-numbered  file.

The Domain name resolver no longer attempts to search infinitely for a
canonical  name when two canonical names that are aliases for each
other have been defined  by error in the Domain name server database,
and you specify one of these names with the Connect or SHow NAme
command.

Previously, you had to reboot the server to terminate this infinite
loop.

Previously, if you entered the command, SH NAmes or SH NAmes *, the
Domain  name server failed to respond and the system crashed after the
timeout period had  expired.

These commands are no longer valid so you must specify a name.  If you
attempt to  issue these commands without specifying a name, the
following error message  appears:

 can only show unique Domain names

You can now establish interconnections properly.  Previously, when
certain  interconnections were requested, the system crashed.

You can now specify the local broadcast address when you enter the
global network  manager form of the Broadcast command without
disrupting the network.   Previously, this command caused extremely
heavy traffic on the network.

The SHow LinePRotocol command now displays correct information.
Previously,  it always showed the value of the LinePRotocol parameter
as BYTEsynchronous.

Also, you can no longer change the value of this parameter with the
SETD  command.

You can now simultaneously run three or more recursive macros that
contain  Connect or DisConnect commands.  Previously, the system
crashed within three  hours of invoking the macros.

Setting the NetAscii parameter of a port to UseNul no longer causes
spurious ^A  characters to be inserted in the data stream sent to that
port.

The CS/100 now consistently passes special characters, for example,
<CR>, as  data.  Previously, it often failed to do this in incoming
connections, and processed  them instead.

When the DataForward parameter is set as the result of an echo
negotiation by a  destination server using the Telnet protocol, it no
longer automatically changes to  None after the echo has been
negotiated.

An error, which caused the Domain name resolver to fail to respond to
inquiries  under certain circumstances, has been corrected.

This version attempts to establish connections to permanent circuits
(PVCs)  according to the order in which the connection requests are
received.  Previously,  priority was always given to the attempt to
connect to the lowest numbered PVC.

Also, you can successfully establish more than one PVC.  Previously,
you could  not reliably do this.

Domain name requests are sent to the NCS address specified by the
FileServer- Address parameter if both the PrimaryNS and SecondaryNS
parameters are not  defined.

Previously, no alternate address was available to respond to these
requests.

Network errors are now recorded in the audit trail record with the
code "NE."  Previously, they were coded as "EE."

The boot time displayed by the SHow VERsion command now displays the
actual boot time.

Previously, the time was computed.

Previously, you could not perform certain file transfer tasks if,
after establishing a  connection, you disabled the ECM character with
the following command:

 SET ECMchar = disabled

For example, if you attempted to transfer files from a personal
computer, setting  this parameter sometimes caused data loss.  This
resulted in failure of the file  transfer.

This problem has been fixed.

The session number field in the audit trail messages coded CD and DC
has been  replaced by a four-digit field which indicates the TCP
protocol port number.

Previously the session number field always displayed 0, regardless of
the session  number.

You can no longer assign an Internet address beginning with 127 to a
Communications Server or a port.  This number is reserved for loopback
according  to the TCP/IP protocol implementation.

If you attempt to assign an Internet address beginning with 127, the
following error  message is displayed:

 Address cannot be broadcast at loopback.

You must reassign existing Internet addresses that begin with 127.

When two Communications Servers on the network have the same Internet
address,  you can now issue commands from a source server that specify
the source server as  the destination.

Previously, for example, if ServerA and ServerB had the same Internet
address and  you issued the PIng command from ServerA, ServerB's host
was pinged instead of  ServerA's.

A problem with the Domain name resolver, which arose on Communications
Servers on which the maximum number of sessions was being held, has
been  corrected.

Previously, for example, if you entered the Name or Connect command on
a CS/100 on which the maximum number of sessions for that server was
being held,  the Domain name resolver did not respond and the
following error message was  displayed:

 No memory resource

Even if the number of sessions was reduced, the Domain name resolver
still did not  function.

When forwarding data, the Telnet code now removes the ASCII control
character  NUL when it follows the control character CR.  Previously,
it failed to do this,  which caused data forwarding problems when
Telnet is used in conjunction with  the Berk
eley 4.3 release of the UNIX operating system.

Previously, the CS/100 crashed when it received a large number of ARP
broadcast  packets sent over the UNIX Operating System.  This has been
fixed.

The system no longer crashes if you perform the following sequence
steps:

 - Enter the Connect command
 - Enter the ECM character
 - Set the BReakAction parameter to IGnore and the BReakChar to ^C
 - RESume the session
 - Hold down the Control key and the "C" key simultaneously
   Limitations

Version 3.0 has the following limitations:

Automatic user default logins cannot be performed on terminal ports of
a CS/100  running SW/100-TCP Version 3.0.

You can change the virtual port configuration with the SETDefault
command only  on the first virtual port on your Communications Server.
If you attempt to change  other virtual port configurations with this
command, the following error  message is
displayed:

 Portid out of range

Also, if you change the configurations for the first virtual port, you
must enter the  ReaD command before the changes can take effect.
These changes take effect on all  virtual ports.

A CS/100 that uses access control normally performs a default login on
a host port.   However, if you add a host port to a rotary, you must
use the Listen command on  the rotary for it to be able to accept an
incoming connection on the newly added
port.

Known Problems

SW/100-TCP-NCS/AT Version 3.0 has the following known problems:

When using the IEN116 Name Server, the command SHow (<name>) VERSion
does not function correctly if <name> is defined on a secondary name
server but  not on a primary name server.

If, when entering a macro, you press the Break key before the macro
input has been  fully entered, the portion of the macro that has been
entered is executed.  Consequently, an error message is usually
displayed.

To prevent this, after you press the Break key while typing a macro,
press the  Return key twice before entering the next command.

Documentation

The following manuals are shipped with SW/100-TCP-NCS/AT Version 3.0:

  TCP/IP Connection Service User's Guide (3/89)
 (Part Number: 09-0173-00)

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

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

  Configuration Guide (2/88)
 (Part Number: 09-0093-01)

  TCP/IP Connection Service Quick Reference Guide
 (Part Number: 09-0165-00)

Refer to the following manuals for more information on SW/100TCP-
NCS/AT Version 3.0:

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

  NCS/AT Installation and Operation Guide (12/87)
 (Part Number: 09-0092-02)

  LAN Planning Guide (2/88)
 (Part Number: 09-0085-01)

If you have any questions, contact your network supplier or 3Com for
help.

Trademarks
UNIX is a registered trademark of AT&T Bell Laboratories.
