In Part 2, you will use Wireshark to capture and analyze Ethernet II frame header fields for local and remote traffic. In the first part of this lab, you will review the fields contained in an Ethernet II frame. When learning about Layer 2 concepts, it is helpful to analyze frame header information. For example, if the upper layer protocols are TCP and IP and the media access is Ethernet, then the Layer 2 frame encapsulation will be Ethernet II. The frame composition is dependent on the media access type. When upper layer protocols communicate with each other, data flows down the Open Systems Interconnection (OSI) layers and is encapsulated into a Layer 2 frame.
In this case, you can set the setuid bit for dumpcap so that it always runs as root.7.1.6 Lab – Use Wireshark to Examine Ethernet Frames Topology Finally, if the problem is still not resolved, it may be that dumpcap was not correctly configured, or there is something else preventing it from operating correctly. Then log out and log back in (or reboot), and Wireshark should work correctly without needing additional privileges.
In summary, after installing Wireshark, execute the following commands: sudo dpkg-reconfigure wireshark-common Since you are running Ubuntu, this can be resolved by following the instructions given in this answer on the Wireshark Q&A site. This sometimes results from an incomplete or partially successful installation of Wireshark. with sudo), it should generally be avoided (see here, specifically here).
While you can avoid this issue by running Wireshark with elevated privileges (e.g. This is usually caused by incorrectly setting up permissions related to running Wireshark correctly.
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