Microsoft KB Archive/163210

= SNA Server Does Not STSN Sequence Numbers On Positive =

Article ID: 163210

Article Last Modified on 11/26/2003

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APPLIES TO


 * Microsoft SNA Server 2.0, when used with:
 * Microsoft Windows NT 4.0
 * Microsoft SNA Server 2.1, when used with:
 * Microsoft Windows NT 4.0
 * Microsoft SNA Server 3.0, when used with:
 * Microsoft Windows NT 4.0
 * Microsoft SNA Server 2.11 Service Pack 1, when used with:
 * Microsoft Windows NT 4.0

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This article was previously published under Q163210





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:

\SYSTEM\SNASERVR.EXE

\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.   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                     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.... >                     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                     SNA Server responds with STSN REPLY: TESTPOS,TESTNEG,0,25 <pre class="fixed_text">  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.... >                       </li></ol>

Additional query words: prodsna

Keywords: kbnetwork KB163210

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