DOCUMENT:Q219323 17-MAY-2002 [winnt] TITLE :IPX Router Does Not Increase Transport Control Field PRODUCT :Microsoft Windows NT PROD/VER::4.0,4.0 SP4 OPER/SYS: KEYWORDS:kbWinNT400sp5fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server versions 4.0, 4.0 SP4 ------------------------------------------------------------------------------- SYMPTOMS ======== Normally, when an IPX packet is propagated by the router, the Transport Control (TC) field is increased by 1. The router does not propagate any packets with TC=16. This guarantees that IPX packetets do not go further than 16 hops from the source. When the TC is not incremented, packets (especially broadcasts) are propagated an infinite number of hops, which has the potential to create huge network storms. CAUSE ===== This problem occurs because this functionality was lost with Windows NT 4.0 Service Pack 4. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Windows NT Server 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 Microsoft Windows NT Server 4.0 and Windows NT Server 4.0 Service Pack 4. This problem was first corrected in Windows NT Server 4.0 Service Pack 5. Additional query words: ====================================================================== Keywords : kbWinNT400sp5fix Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400sp4 kbWinNTS400search kbWinNTS400 Version : :4.0,4.0 SP4 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.