Microsoft KB Archive/131427

= Windows NT 3.51 TCP/IP System Network Interface Hang =

Article ID: 131427

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Server 3.51

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This article was previously published under Q131427



SYMPTOMS
A Windows NT computer running TCP/IP stops responding on the network. No frames are sent from the network interface card (NIC), and incoming frames are not seen. Local (non-network) processing continues to function normally.

NOTE: This problem rarely occurs. It was seen only once on a busy Internet server.

CAUSE
A router on the network responded to the server with an ICMP destination unreachable (fragmentation requested, but with the DF bit set). It included an advisement that the next-hop MTU size was one byte. This is an illegal MTU value.

RESOLUTION
To correct this problem, install Windows NT 3.51 Service Pack 1.

STATUS
Microsoft has confirmed this to be a problem in Windows NT version 3.51. This problem has been corrected in the latest U.S. Service Pack for Windows NT version 3.51. 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

Additional query words: prodnt

Keywords: kbnetwork KB131427

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