Article ID: 166224
Article Last Modified on 11/1/2006
APPLIES TO
- Microsoft Windows NT 4.0 Service Pack 1
- Microsoft Windows NT 4.0 Service Pack 2
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Workstation 4.0 Developer Edition
This article was previously published under Q166224
SYMPTOMS
If an SNA Server 802.2 connection (over Token Ring, Ethernet or FDDI) is
manually stopped or fails due to an outage, the connection may stop
responding (hang) in an incoming or inactive status and cannot be
reactivated until the SNA Server service is stopped and restarted. When
attempting to restart the connection, the status will remain as incoming or
inactive, and will never indicate a pending status.
If multiple connections all share the same 802.2 link service, this problem
may only affect a single connection.
This problem can also occur when connecting a branch-based remote link
service through an 802.2 distributed link service running on a centralized
server, though the behavior within SNA Admin or Manager is different. The
remote link service may indicate a pending status when it is restarted.
To confirm this problem using SNA Server tracing, a Level 2 message trace
on the 802.2 link service (for example, snadlc1, snadlc2 and so on) is
required. This trace will indicate a call to data link control (DLC) close
station which never completes.
For information about a problem that has similar symptoms, but a different
cause, please see the following article in the Microsoft Knowledge Base:
ARTICLE-ID: 147514
TITLE : Stopping SNA Server Service Causes Perpetual "Stopping"
Status
The problem in the referenced article occurs only Windows NT version 3.51
whereas the problem documented here occurs on both Windows NT version 3.51
and 4.0.
CAUSE
When an 802.2 connection is shut down, the SNA Server link service submits
a DLC.CLOSE.STATION request to the Windows NT Dlc.sys driver. If the link
station is in a checkpoint state within the Windows NT DLC driver (where
the t1 or ti timer has expired for the link station), the DLC.CLOSE.STATION
attempt will never complete. Because the link station has not completed the
shutdown process, the SNA Server link service is not able to reactivate the
connection.
RESOLUTION
A hotfix to Windows NT 3.51 and 4.0 is available to correct this
problem. To resolve this problem, obtain the hotfix mentioned below.
STATUS
Microsoft has confirmed this to be a problem in Windows NT 3.51, Windows NT
3.51 (SP1-SP5), and Windows NT 4.0 (SP1, SP2).
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):
Additional query words: prodnt 4.00 3.51 2.0 2.1 2.11 3.0
Keywords: kbbug kbnetwork KB166224