DOCUMENT:Q196051 20-MAY-2002 [winnt] TITLE :Excessive Network Retransmissions While Running CSNW PRODUCT :Microsoft Windows NT PROD/VER:WinNT:4.0 OPER/SYS: KEYWORDS:kbWinNT400sp5fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 4.0 - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure that you understand how to restore it if a problem occurs. For information about how to do this, see the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe. SYMPTOMS ======== Client Services for NetWare (CSNW) may retransmit an NCP packet in 110 ms. The retransmission of 110 ms will occur in a network with a tick count of 2 being announced. CAUSE ===== Windows NT uses the TickCount in the NetWare routing packet as a round trip time. In reality, TickCount is the number of ticks it takes a packet to reach the remote destination. One tick equals one-sixteenth of a second. The tick out is used by Windows NT to calculate when to retransmit a packet because it did not receive a response. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to: - http://www.microsoft.com/Windows/ServicePacks/ -or- - Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5. MORE INFORMATION ================ A tunable parameter has been added to allow the user to increase the tick count on a CSNW client. This parameter will add a user specified number of ticks to the tick count on a client. This user specified value will be added to all tick counts on a system. This will increase the amount of time it takes for Windows NT to retransmit a packet. WARNING: Using Registry Editor incorrectly can cause serious problems that may require that you reinstall your operating system. Microsoft cannot guarantee that problems that result from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. For information about how to edit the registry, see the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Microsoft recommends that you back up the registry before you edit it. If you are running Windows NT or Windows 2000, Microsoft also recommends that you update your Emergency Repair Disk (ERD). 1. Start Registry Editor and go to the following subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services \NwRdr\Parameters 2. Choose Add Key from the Edit menu and use the following information: Value Name: TickCountModifier Data Type: REG_DWORD Value: 1 to 255 Value that the tickcounts should be increased by Additional query words: 4.00 ====================================================================== Keywords : kbWinNT400sp5fix Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : WinNT:4.0 Hardware : ALPHA x86 Issue type : kbbug Solution Type : kbfix ============================================================================= 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 2002.