Ibmsync.sys May Cause Connection Loss

ID: Q161704

The information in this article applies to:

Microsoft SNA Server, versions 2.11, 2.11 SP1

SYMPTOMS

When using a Synchronous Data Link Control (SDLC) card that uses Ibmsync.sys on a multi-drop line, excessive traffic may result in a connection loss. It is possible that this problem could occur with any SDLC card that uses Ibmsync.sys (IBM and Microgate dumb cards). This problem is extremely rare as it has only been observed at one customer site.

RESOLUTION

To work around this problem:

Use the 2.1 or 3.0 version of Ibmsync.sys. The problem was only observed in SNA Server versions 2.11 and 2.11 sp1.

STATUS

Microsoft has confirmed this to be a problem in SNA Server version 2.11 and SNA Server 2.11 Service Pack 1 (SP1). A supported fix to this problem is in development, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information on the availability of this fix.

Additional query words: microgate ibm sdlc

Keywords : kbnetwork kbbug2.11 kbbug2.11.sp1 kbfix2.11.sp2 snasdlc
Version : WINDOWS:2.11,2.11 SP1
Platform : WINDOWS
Issue type :