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Large Send Offload (Jumbo Frame) and Traverse - Connect IT Community | Kaseya
<main> <article class="userContent"> <p><strong>PROBLEM:</strong></p> <p>In theory and in most cases having jumbo frames enabled in a network has been proven to increase network performance and reduce CPU overhead. It is possible that it may also cause inconsistency or incompatibility with certain network protocols or applications.</p> <p>This article is to specifically highlight one case where there was evidence of an incompatibility with the Traverse WMI Query Daemon.</p> <p><strong>SOLUTION:</strong></p> <p>If the following symptoms are exhibited, please review the environment settings and disable the 'Large Send Offload' feature on the NIC for the DGE to see if the issue is resolved. <strong>A server reboot is required after this change has been made.</strong></p> <p> </p> <ul><li>All WMI tests monitored by a specific DGE(-X) or proxy go unreachable or unknown.</li> <li>WMI Query Daemon stops working (component is still running and no sign of a crash)</li> <li>monitor.log shows:<br>m.c.w.s.WmiQdNetworkClientImpl$TelnetClientHandlerNew I/O worker #1: (WARN ) Unexpected exception from downstream. : null</li> <li>Wireshark capture shows (attached)<br><br><img src="/attachments/token/b04FdFJoDfZTt2YSgaUJwv26E/?name=large+send+offload+1.png" alt="large_send_offload_1.png" class="embedImage-img importedEmbed-img"></img><br><br>.<img src="/attachments/token/UgZ5CQRNWTQITLrmk4ZDEnOeE/?name=large+send+offload+2.png" alt="large_send_offload_2.png" width="821" height="580" class="embedImage-img importedEmbed-img"></img></li> </ul><p> </p> <p> </p> </article> </main>