Windows Performance Analyzer is a great tool to view ETL files that contain system performance data, but not the best thing for network traces. No improvements to Netmon have been made since 2010 but is still available for download from Microsoft. įor the last few years, Microsoft has used a variety of tools to decode and view the data in ETL files, mainly NetMon, Windows Performance Analyzer and Microsoft Message Analyzer. When using NETSH to capture a network trace, it generates a specialized file with an ETL file extension. You can read all about what NETSH can be used for here. NETSH is a great tool built into the Windows OS and can be used to configure many parts of the networking stack within your Windows OS. If your issue requires network traces to be captured, Microsoft Support will often ask you to capture the m running a built-in utility called NETSH.
Maybe you or your staff also has the technical expertise to review the data and make some preliminary observations while waiting for Microsoft Support to complete the investigation. Maybe y ou want to review that data yourself. Sean Greenbaum here with a tale from the field.Īs many of you have probably experienced, when working with Microsoft Premier support, you’ll often be asked to capture some data and upload it to Microsoft for analysis. Repeat this command for each set of component IDs that you're interested in.Hello. For such multilayered scenarios, specify the desired component ID in the pcapng output " pktmon pcapng log.etl -component-id 5". Pcapng format doesn't distinguish between different networking components where a packet was captured.This way you're able to analyze the dropped packets in a separate log. To separate all the packets in the capture from dropped packets, generate two pcapng files one that contains all the packets (" pktmon pcapng log.etl -out log-capture.etl"), and another that contains only dropped packets (" pktmon pcapng log.etl -drop-only -out log-drop.etl"). Pcapng format doesn't distinguish between a flowing packet and a dropped packet.Log contents should be carefully prefiltered for conversion. C:\Test> pktmon pcapng helpĭropped packets aren't included by default.įilter packets by a specific component ID.Įxample: pktmon pcapng C:\tmp\PktMon.etl -d -c nicsĪll information about the packet drop reports and packet flow through the networking stack is lost in pcapng format output. Use the following commands to convert the pktmon capture to pcapng format. This article explains the expected output of pcapng files and how to take advantage of it.
However, some of the critical information could be missing in pcapng files. These logs can be analyzed using Wireshark (or any pcapng analyzer). Packet Monitor (Pktmon) can convert logs to pcapng format. Applies to: Windows Server 2022, Windows Server 2019, Windows 10, Azure Stack Hub, Azure, Azure Stack HCI, versions 21H2 and 20H2
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