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The developers of the libIEC61850 library have released a fix for a bug that could cause valid GOOSE messages to be discarded by the receiving application. The problem affected version 1.6.2 and was caused by an incorrect Ethernet frame length check. The messages could be transmitted over the network successfully and appear in Wireshark, yet never reach the GOOSE subscriber's handler. This matters above all for developers of products supporting the IEC 61850 standard that use libIEC61850.
There are several applications that can be used for monitoring IEC 61850 traffic in the Ethernet network. But there is one free-of-charge option everyone should know about.
When configuring GOOSE and Sampled Values communications it is useful (and sometimes is a must) to have the possibility to check VLAN and Priority tags. Whether your network adapter driver strips tagging or not will define the availability of these parameters not only while using Wireshark, but also other specific tools for analysis of GOOSE and Sampled Values traffic (Omicron SVScout, Omicron IEDScout, GOOSE Inspector, etc.). Today we will see how to make Intel network adapters not to strip this important info.