DOCUMENT:Q161368 09-AUG-2001 [winnt] TITLE :Service Pack 2 May Cause Loss of Connectivity in Remote Access PRODUCT :Microsoft Windows NT PROD/VER: OPER/SYS: KEYWORDS:kbenvkbbuglist kbfixlist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 SP2 - Microsoft Windows NT Workstation version 4.0 SP2 ------------------------------------------------------------------------------- SYMPTOMS ======== After you install Service Pack 2 for Windows NT 4.0, you may not be able to ping or otherwise make use of the connection you have established with an ISP when using RAS to dial out. Additionally, the route table may not have a route for the remote connection. CAUSE ===== The Multilinking Protocol (MP) option is always negotiated during the Link Control Protocol (LCP)-phase of negotiation in Service Pack 2 for Windows NT 4.0. This occurs if the Enable PPP LCP Extensions check box on the Server tab of the Edit Phonebook Entry dialog box is enabled or disabled. Although MP is an extension of LCP, it is not part of RFC 1570 -- LCP Extensions. In Service Pack 2 for Windows NT 4.0, it is no longer necessary to enable this check box to attempt MP negotiation. NOTE: Some Internet service providers (ISP) cannot deal with the MP options correctly. This problem is resolved by changing the conditions in which RAS sends multilink information to the remote server. RESOLUTION ========== The binaries below resolve this issue by making an attempt at MP negotiation only if there is more than one link in the phonebook entry. STATUS ====== Microsoft has confirmed this to be a problem in Microsoft Windows NT version 4.0. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces): S E R V P A C K NOTE: This fix is to be applied only to computers with Service Pack 2 for Windows NT 4.0 installed. This hotfix has been posted to the following Internet location: ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/NT40/hotfixes-postsp2/ras-fix MORE INFORMATION ================ For additional information, please see the following article in the Microsoft Knowledge Base: ARTICLE-ID: Q166090 TITLE : MSN Support in Windows NT Additional query words: sp2 prodnt dun dial-up networking Bad IP Address RAS ====================================================================== Keywords : kbenv kbbuglist kbfixlist Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400search kbWinNT400search kbWinNTW400sp2 kbWinNTSsearch kbWinNTS400sp2 kbWinNTS400search Issue type : kbbug ============================================================================= 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.