| Event Id | 4 |
| Source | SNA Server |
| Description | (1133) Message Sequence Error |
| Event Information | According to Microsoft: Cause: The SNA Server 802.2 DLC link service receives data from the Windows NT Dlc.sys driver. Under heavy load, the link service may encounter a "local busy" condition, causing the DLC driver to issue a Receiver Not Ready (RNR) frame to the remote system. When exiting an RNR condition, the DLC driver may pass up a duplicate frame to SNA Server, which may cause that SNA session to terminate unexpectedly Resolution: This problem is fixed in Microsoft Windows NT 4.0 Service Pack 4. The updated module is Dlc.sys |
| Reference Links | SNA Server Sessions Lost Over 802.2 DLC Connection |
Catch threats immediately
We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.