DOCUMENT:Q263156 13-JUN-2001 [sna] TITLE :SNA Server Event IDs 4, 13, and 38 Message Sequence Errors PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:2.11 (all SP),3.0 (all SP),4.0,4.0 SP1,4.0 SP2,4.0 SP3 OPER/SYS: KEYWORDS:kbsna211sp1 kbsna211sp2 kbsna300sp1 kbsna300sp2 kbsna300sp3 kbsna300sp4 sna4 kbsna400sp ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 2.11 SP1, 2.11 SP2, 3.0 SP1, 3.0 SP2, 3.0 SP3, 3.0 SP4, 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3 ------------------------------------------------------------------------------- SYMPTOMS ======== A computer running SNA Server that has the Data Link Control (DLC) bound to teamed IBM Netfinity 10/100 Ethernet adapters to communicate with the host may experience dropped LU-LU sessions. The following events may appear in the Application event log. Event Source: SNA Server Event ID: 4 Description: (1133) Message Sequence Error Event Source: SNA Server Event ID: 13 Description: (1141) Message Sequence Error (SENSE = 0) Event Source: SNA Server Event ID: 38 Description: APPC session deactivated abnormally CAUSE ===== A packet arrives at the SNA Server link service that is corrupt, causing a sequence number to be skipped. Because the next packet that arrives has a sequence number that is not one greater than the previous, SNA Server sends an UNBIND to the host with sense code 2001, which means there is a sequence error. RESOLUTION ========== The teaming function for the adapters that are bound to the DLC must be configured for Fault Tolerance mode, rather than Fast Ether Channel. WORKAROUND ========== Disable teaming for the DLC, and use a single NIC for the SNA Server-to-host link. MORE INFORMATION ================ An SNA Server trace of this problem contains the following messages (data is truncated for simplicity). The sequence numbers, noted by ^^^^ in each RU, are 009B, 009C, and 009E: ----------------------------------------------- 11:41:17.0878 04160000->01020101 DLC DATA DAF:01 OAF:02 ODAI:off Normal RQE FMD MC DR1 ---- Header at address 012054F4, 2 elements ---- 0B050000 00002C00 0102009B 01009000 <......,.........> ^^^^ ---- Element at address 01BF7460, start 10, end 268 ---- 009000F0 A140F0F0 F0F0F0F0 F0F0F04B <...0.@000000000K> F0F0A140 F0F0F0F0 F0F0F0F0 F04BF0F0 <00.@000000000K00> ----------------------------------------------- 11:41:17.0878 04160000->01020101 DLC DATA DAF:01 OAF:02 ODAI:off Normal RQE FMD MC DR1 ---- Header at address 012049FC, 2 elements ---- 0B050000 00002C00 0102009C 01009000 <......,.........> ^^^^ ---- Element at address 01BF6468, start 10, end 268 ---- 009000F0 F0F0F0F0 F04BF0F0 A140F0F0 <...000000K00.@00> F0F0F0F0 F0F0F04B F0F0A140 F0F0F0F0 <0000000K00.@0000>
----------------------------------------------- 11:41:17.0894 04160000->01020101 DLC DATA DAF:01 OAF:02 ODAI:off Normal RQE FMD MC DR1 ---- Header at address 012043B0, 2 elements ---- 1E040000 00002C00 0102009E 01009000 <......,.........> ^^^^ ---- Element at address 01BF7460, start 10, end 268 ---- 009000F0 F0A14F40 A1404040 4040A140 <...00.O@.@@@@@.@> F0F0F0F0 F0F0F0F0 F04BF0F0 A140F0F0 <000000000K00.@00> The following message appears in the trace where the RU with sequence number 009D needs to be: ----------------------------------------------- 11:41:17.0894 04160000->01020101 DLC DATA INVALID TH !! ---- Header at address 012054F4, 1 elements ---- 1E040000 00000000 00000000 01009000 <................> ---- Element at address 01BF3EC4, start 10, end 45 ---- 00000000 00000000 00000000 00000000 <................> 00000000 00000000 00000000 00000000 <................> A network trace captured on an independent computer displayed a good RU with sequence 009D arriving at the Ethernet switch to which SNA Server was connected. The third-party products discussed in this article are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability. Additional query words: ====================================================================== Keywords : kbsna211sp1 kbsna211sp2 kbsna300sp1 kbsna300sp2 kbsna300sp3 kbsna300sp4 sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 Technology : kbAudDeveloper kbSNAServSearch kbSNAServ400 kbSNAServ211SP1 kbSNAServ211SP2 kbSNAServ300SP3 kbSNAServ300SP1 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ300SP2 kbSNAServ300SP4 Version : WINDOWS:2.11 (all SP),3.0 (all SP),4.0,4.0 SP1,4.0 SP2,4.0 SP3 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.