We need to locate a packet that has been sent from the download source to your computer.The screenshot below is a packet capture taken just before and during a http download of a Linux ISO from mirror.ac.uk.Analysing The DataThe following information shows you how to interpret the data that has been captured by Wireshark. Please ensure you save the file as a Wireshark. Save the file with a relevant filename ready to send to us.Now the data is captured you will need to store the results in a file.You only need to capture about 10 seconds of traffic. Packet captures can result in fairly large files if left running for long.Here we're downloading a HTTP file from mirror.ac.uk:.Important: you should only do this after the packet capture has started.: Once the packet capture has begun you can open the application or download for which you want to check the priority of.Click Start to start capturing traffic:.Failure to do this can make it difficult to interpret the captures. At this point, it is best to shutdown any other applications that might be causing network traffic like IM clients, email clients and Peer-to-Peer applications.By default this is pointed at your desktop: At this stage you should also enter a descriptive name in the File: field.However you should be able to find this from its description. If you are using a USB modem the interface is still likely to be listed as a network adapter. If you are using a router this will be your Network (NIC) card. Select the relevant network interface from the drop-down at the top of the Options window.Firstly, start Wireshark by double clicking the application icon on your desktop:.How to Capture DataSee a video tutorial on data capture.

When To Use WiresharkIf you think that a particular application is transferring data slowly or performance is not what should be expected, Wireshark can help determine that your data is being prioritised correctly.ģ.

Plusnet cannot be held liable for issues that arise from the download or use of the software.Ģ. Wireshark was written by an international group of networking experts, and is open source software. Note that a Windows portable version is also available which can be installed on a USB key. Choose the file appropriate to your computer's operating system. What Is Wireshark?Wireshark is a free network protocol analyser - it captures information about all network activity from your computer and can be used in diagnosing problems you may have with network performance, be it general or for a specific application.

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