NOVELL TECHNICAL INFORMATION DOCUMENT

TITLE:              Various fixes for LWP 4.1 problems
DOCUMENT ID:        TID000586
DOCUMENT REVISION:  A
DATE:               09AUG93
ALERT STATUS:       Yellow
INFORMATION TYPE:   Symptom Solution
README FOR:         LWP41N.EXE

NOVELL PRODUCT and VERSION:
LAN WorkPlace for DOS 4.1

ABSTRACT:
Includes static route support, dead router detection, automatic router
switch, TCP receive Window size tuning, updates to TNVT220 and more.
_________________________________________________________________

DISCLAIMER
THE ORIGIN OF THIS INFORMATION MAY BE INTERNAL OR EXTERNAL TO NOVELL. 
NOVELL MAKES EVERY EFFORT WITHIN ITS MEANS TO VERIFY THIS INFORMATION. 
HOWEVER, THE INFORMATION PROVIDED IN THIS DOCUMENT IS FOR YOUR INFORMATION
ONLY.  NOVELL MAKES NO EXPLICIT OR IMPLIED CLAIMS TO THE VALIDITY OF THIS
INFORMATION.
_________________________________________________________________

Self-Extracting File Name:  LWP41N.EXE

Files Included     Size     Date        Time

  LWP41N.TXT          (This File)
 INSTALL.BAT         36    4-29-93      5:09p
   PATCH.EXE      78129    1-19-93     12:18a
   PATCH.RTP     183924    6-28-93      2:20p


LWP41N.EXE/binary

Contains fixes for the LAN WorkPlace for DOS 4.1 product.

The following files are updated in this patch (using the .RTPatch
utility):

INSTALL  EXE    245454 02-02-93   4:10a
INSTALL  MSG     10136 02-02-93   4:10a
LWPCON   EXE    257222 04-06-93   4:38p
LWPCON   HLP     44238 04-06-93  11:48a
LWPCON   MSG     14334 04-06-93   4:37p
PRESENTR EXE    183984 03-26-93  11:23a
RFCNBIOS EXE     57367 05-12-93   3:13p
SNMP     EXE     32308 04-06-93  11:56a
TCPIP    EXE     40120 06-14-93   4:10a
TELAPI   EXE     39712 03-26-93  11:28a
TELNET   DLL     12304 06-07-93   3:49p
TNVT220  EXE    107604 03-26-93  11:32a
WFTPFS   DLL     52592 01-15-93   3:01p
WLIBSOCK DLL     43000 03-01-93   3:15p

Installation instructions:

1.  Ensure you have the original LWP DOS 4.1 software installed, and remove
any previously applied patches.  See the notes below for more info on
removing patches.

2.  Go to the \NET directory, and make a PATCH subdirectory, if one does
not already exist.

3.  Copy the LWP41N.EXE file to \NET\PATCH and unarchive it by executing
it.

4.  Execute the INSTALL.BAT file.

Notes:

You must have the original LWP DOS 4.1 software installed in order to apply
this update.  If the patch program cannot find the original 4.1 files, the
new files will not be installed, and warning messages will be displayed. 
If you have installed any other updates to LWP, you should remove them and
restore the original files prior to applying this update.

The patch program will store the original files in the \NET\PATCH\BACKUP
directory. If you need to revert to the original files, go to this
directory, rename the UNPATCH.BAK file to UNPATCH.BAT, and execute the
file.  The original files will be restored.



New features:

1.  Static route support.

New NET.CFG keyword "route" for entering static routes.

  route host <dest-host> <gateway>
  route net  <dest-net> <gateway>

Example:

  Protocol TCPIP
    route host 1.0.0.1  2.0.0.254

LWPCON is now able to insert/modify/delete entries in the LWP route table. 
All routes entered are treated as static routes.  The type of route is
determined by the destination IP address, hence only routes for
non-subnetted network addresses can be differentiated.  Subnetwork based
routes are treated as host specific routes.

LWPCON now displays default routers as entries in the route table for the
local LWP node (default routers are not displayed for remote nodes). 
Default routers cannot be modified/deleted.


2.  Dead router detection and automatic router switch.

Up to three default routers can be entered with the NET.CFG "ip_router"
keyword for each network interface supported.  TCPIP.EXE will display them
as "Default Router1/2/3" in the signon message if configured.  The first
active default router listed in NET.CFG is used by TCPIP.EXE at startup.

TCPIP will automatically switch the default router if the current router
does not respond to an ARP request, or upon sending the third TCP
re-transmit packet.  A new NET.CFG keyword "rt_trigger  N" can be used to
change the default TCP re-transmit router switch level from 3 (3rd re-xmit)
to N (Nth re-xmit).  The valid range is from 1 to 255.  Setting this to a
large value will effectively disable the router switch caused by excessive
TCP retransmit.


3.  ARP table editing.

LWPCON can be used to edit the ARP table, for both local and remote hosts
(proper ControlCommunity setting in LWPCON is required for remote
editing).


4.  TCP receive window size tuning.

New NET.CFG keyword "tcp_window" to set the initial (maximum) LWP TCP
receive window size.  Valid range is from 0 to 32767.  A value of zero or
no entry tells TCPIP to use the default of 2880.


5.  TCP max segment size tuning.

New NET.CFG keyword "tcp_maxsegsize" to set the maximum segment size. Valid
range is from 0 to the maximum size before IP fragmentation can occur (eg.
for Ethernet, 1440).  A value of zero or no entry tells TCPIP to use the
default (varies by physical layer).


6.  Allow spaces and non-printable characters in NetBIOS names.

If you need to use a space within a NetBIOS name, you must use quote (")
characters to delimit the beginning and ending of the name.  If you don't
need spaces in the cached names, then the old style syntax without quotes
will continue to operate.

Hex characters are delimited by the \ character.

For example,
	
	dpx300\00\FFeng

puts a byte of binary zeroes followed by a byte of binary ones between the
"dpx300" and the "eng" in the above string.

Sample NET.CFG section:

Protocol RFCNBIOS
	Name1			131.57.5.96
	"Name1 "		131.57.5.97
	"Name  1"		131.57.5.98
	"   Name  1"	  	131.57.5.99
	dpx300\00\FFeng	        131.57.6.100



Summary of fixes:


INSTALL.EXE, INSTALL.MSG
------------------------
Install fails on compressed disk drive (eg.  DR. DOS Superstor).  To use
the new install, copy these 2 files to your LWP Installation disk 1.


LWPCON.EXE, LWPCON.HLP, LWPCON.MSG
----------------------------------
Add/delete/modify static routes.

Add/delete/modify ARP table entries.


PRESENTR.EXE
------------
GP Faults when certain escape sequences are displayed on screen.

Miscellaneous other display fixes.


RFCNBIOS.EXE
------------
Allow spaces and non-printable characters in NetBIOS names.


SNMP.EXE
--------
NET.CFG entries ignored when preceded by tabs.


TCPIP.EXE
---------
System hangs when remote host advertises TCP window size > 32k.

Connection reset when remote host advertises TCP window < 1k.

Throughput slow after a reconnect.

System hangs when large ping packet (eg. 3000 bytes) received.

System hangs when multiple ARP replies received.

Locus redirector fails with TinyTerm emulator.

Out of band data support (send only).

Configurable TCP window size.

Configurable max segment size.

Multiple static route support.

Dead router detection.

PPP overwrites ip_netmask and ip_router.

Accept multiple default routers in BOOTP reply.

UDP fragment reassembly problem.

System hangs with WordPerfect SMTP TSR.

Miscellaneous socket API fixes.


TELAPI.EXE
----------
Not compatible with NASI V3.0 applications.


TELNET.DLL
----------
Host Presenter error "A read request is already outstanding".


TNVT220.EXE
-----------
Terminal type switch (-t) does not work.

dec-vt220 terminal type sent in vt100 emulation.

cc:mail keyboard conflict.

GP Faults when certain escape sequences displayed on screen.

Can't print in landscape mode (132 columns).

Other display fixes.


WFTPFS.DLL
----------
Copy - rename to AIX causes connection to be dropped.


WLIBSOCK.DLL
------------
Miscellaneous toolkit fixes.
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