How To Capture Vlan Tags With Wireshark?
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1. Launch Wireshark and open the capture file or start a live capture.
2. In the display filter field, type “vlan” and press enter. This will filter the capture to show only frames with VLAN tags.
3. Expand the Ethernet header in the Packet Details pane and look for the 802.1Q header. This header will show the VLAN tag associated with the frame.