But the documentation leads me to expect a list with two icons plus columns headed Description, IP, Packets, Packets/s, whereas the column. It's labeled 'Wireshark - Capture Interfaces', alright. It requires a managed switch, and you must have administrative access to the switch. But when I select Capture / Options from the menu bar, a) no interfaces are shown, and in fact b) I'm pretty sure I'm looking at the wrong window. How you do this depends on the switch model. If you dont, you should find out what interfaces you have available, as the one you are currently using is not working. You will need to set up a mirror interface on the switch to mirror all the traffic from certain interfaces or VLANs to the mirror interface. A network packet analyzer presents captured packet data in as much detail as possible. Switch very quickly learn which MAC addresses are connected to which interfaces it only takes one frame from a MAC address to learn to which interface the MAC address is connected. Only when the destination MAC address is not in the MAC address table table does the switch flood the frame to all interface except the interface on which the frame arrived. Then the switch will look at the destination MAC address to see if it is in the MAC address table in order to determine to which interface the frame should be sent.
As a frame comes into the switch, the switch will add the source MAC address and the interface where the frame came into the switch to its MAC address table. They do not send all traffic to all switch interfaces. Network switches learn which devices are on which switch interfaces, and they send the traffic directly to the interface where the destination device is connected.
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