DOCUMENT:Q170950 09-AUG-2001 [winnt] TITLE :Intermittent Loss of Connectivity While Using Compaq NetFlex-3 PRODUCT :Microsoft Windows NT PROD/VER::3.51,4.0 OPER/SYS: KEYWORDS:kb3rdparty kbhw kbsetup kbHardware ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation versions 3.51, 4.0 - Microsoft Windows NT Server versions 3.51, 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Network connectivity to a computer using the Compaq NetFlex-3 network card is intermittently lost and then restored every few minutes without having to restart the system. Depending on the application, the client or application may have to be restarted to restore the connection. If the application has open files on the server, data may be lost. Some applications report the lost connections. Others applications may seem to stop responding (hang) for several minutes before continuing. On a Compaq computer running Windows NT Server version 4.0 Service Pack 3 (SP3) and has a Compaq NetFlex3 network adapter and Compaq Support Software Disk (SSD) version 2.04 installed, Event Viewer may record the following events: Event ID: 4105 Source: CpqNF31 Description: Network link is down. Please check your cabling. See documentation for more information or contact your service provider. Event ID: 4106 Source: CpqNF31 Description: Network link has been restored. CAUSE ===== The NetFlex-3 10/100 network PCI card is set to 100 MB/full duplex. The NetFlex-3 driver provided with Windows NT 4.0 does not support full duplex mode at 100 MB. WORKAROUND ========== To work around this problem, do one of the following: - Obtain the updated driver for the NetFlex-3 PCI card in Softpack SP3206 from Compaq. NOTE: SP3942 was the current version as of this writing. Go to: http://www.compaq.com/support/files/server/softpaqs/WINNT/NTSSDNTFLX.html For Windows NT 3.51 systems, get Compaq Softpack SP3302 (SSD 1.23A and NetFlex 3 driver version 3.06) from the following location: http://www.compaq.com/support/files/server/softpaqs/WINNT/NTSSDNTFLX3.html The third-party contact information included in this article is provided to help you find the technical support you need. This contact information is subject to change without notice. Microsoft in no way guarantees the accuracy of this third-party contact information. -or- - Set the NetFlex-3 card to half duplex. -or- - Set the NetFlex-3 card to 10 MB. STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 4.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available. Additional query words: NetFlex3 NIC connection lost netflx3 ====================================================================== Keywords : kb3rdparty kbhw kbsetup kbHardware Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT400search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS351search Version : :3.51,4.0 ============================================================================= 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.