DOCUMENT:Q163210  13-JUN-2001  [sna]
TITLE   :SNA Server Does Not STSN Sequence Numbers On Positive
PRODUCT :Microsoft SNA Server
PROD/VER:WINDOWS:2.0,2.1,2.11,2.11 SP1
OPER/SYS:
KEYWORDS:kbnetworkkbbuglist

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-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft SNA Server, versions 2.0, 2.1, 2.11, 2.11 SP1, on platform(s):
    - the operating system: Microsoft Windows NT 
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SYMPTOMS
========

An SLI application can register a SLI_STSN_ROUTINE to handle the STSN (Set and
Test Sequence Numbers) command from the host PLU. When the SLI application
returns a positive response, SNA Server does not echo back the sequence numbers
indicated in the STSN host request.

You may want SNA Server to send the SNA sequence numbers on every STSN response
(positive or negative). SNA Server only returns the sequence numbers in the case
of a TEST NEGATIVE response.

CAUSE
=====

SNA Server does not echo back the sequence numbers in the positive case.

RESOLUTION
==========

An update to SNA Server 2.11 Service Pack 1 is available to correct this
problem. The updated modules include:

   <snaroot>\SYSTEM\SNASERVR.EXE
   <snaroot>\SYSTEM\WINRUI32.DLL


STATUS
======

Microsoft has confirmed this to be a problem in SNA Server version 2.0, 2.1,
2.11 and 2.11 SP1 (this problem is fixed in SNA Server 3.0). This problem was
corrected in the latest SNA Server version 2.11 U.S. Service Pack. For
information on obtaining this Service Pack, query on the following word in the
Microsoft Knowledge Base (without the spaces):

   S E R V P A C K

MORE INFORMATION
================

Annotated SNA Server DLC message traces are included below; these describe two
scenarios where SNA Server fails to echo STSN sequence numbers on positive
response.

1. When the host sends an STSN with the SET, SET options, to which SNA

Server responds with TESTPOS, TESTPOS. This is correct; however, SNA Server does
NOT echo back the sequence numbers in the response.

Host issues STSN REQUEST: SET,SET,37,0

   DLC    ---------------------------------------------- 10:35:57.17
   DLC    01161000->0A020101 DLC DATA
   DLC                       DAF:02 OAF:01 ODAI:off Exp.
   DLC                       STSN   RQD SC  FI BC EC DR1
   DLC
   DLC    ---- Header  at address 00D14174, 1 elements ----
   DLC    06060100 00002D00 02010A88 01000D01     <......-....h....>
   DLC
   DLC    ---- Element at address 0120FB48, start 10, end 18 ----
   DLC    6B8000A2 50002500 00                    <k..sP.%..       >

SNA Server responds with STSN REPLY: TESTPOS,TESTPOS,0,0

   DLC    ---------------------------------------------- 10:35:58.94
   DLC    0A020101->01161000 DLC DATA
   DLC                       DAF:01 OAF:02 ODAI:off Exp.
   DLC                       STSN   +RSP SC  FI BC EC DR1
   DLC
   DLC    ---- Header  at address 00D151E8, 1 elements ----
   DLC    0100880A 00012D00 01020A88 01000D01     <..h...-....h....>
   DLC
   DLC    ---- Element at address 0120EB50, start 10, end 18 ----
   DLC    EB8000A2 50000000 00                    <...sP....       >

2. When the host sends an STSN with the SET, SET & TEST options, to which
   SNA Server responds with TESTPOS, TESTNEG. This is also correct; however, SNA
   Server only fills in the TESTNEG sequence number in the response.

   Host issues STSN REQUEST: SET,SET&TEST,44,27

   DLC    ---------------------------------------------- 10:40:45.11
   DLC    01161000->0A020101 DLC DATA
   DLC                       DAF:02 OAF:01 ODAI:off Exp.
   DLC                       STSN   RQD SC  FI BC EC DR1
   DLC
   DLC    ---- Header  at address 00D156C8, 1 elements ----
   DLC    06060100 00002D00 02010A9A 01000D01     <......-.........>
   DLC
   DLC    ---- Element at address 0120EFE0, start 10, end 18 ----
   DLC    6B8000A2 70002C00 1B                    <k..sp.,..       >

   SNA Server responds with STSN REPLY: TESTPOS,TESTNEG,0,25

   DLC    ---------------------------------------------- 10:40:47.81
   DLC    0A020101->01161000 DLC DATA
   DLC                       DAF:01 OAF:02 ODAI:off Exp.
   DLC                       STSN   +RSP SC  FI BC EC DR1
   DLC
   DLC    ---- Header  at address 00D14B9C, 1 elements ----
   DLC    01009A0A 00012D00 01020A9A 01000D01     <......-.........>
   DLC
   DLC    ---- Element at address 012137BC, start 10, end 18 ----
   DLC    EB8000A2 70000000 19                    <...sp....       >

Additional query words: prodsna

======================================================================
Keywords          : kbnetwork kbbuglist
Technology        : kbAudDeveloper kbSNAServSearch
Version           : WINDOWS:2.0,2.1,2.11,2.11 SP1

=============================================================================

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