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Five Reasons to Move to the Pcapng Capture Format (by Jason Walls)

Using Tshark for CDP Discovery (by Tony Fortunato)

We were in the middle of one of my network janitor jobs and we were trying to figure out who is which port.  I did not have a username to log in the switch, nor did have SNMP access, so I leveraged CDP to figure it out.

Basically we plugged the cable in question into my laptop and captured a CDP packet, which identified the switch name, and port that I was connected to.

Then i showed the group that we can do this from the command prompt saving quite a bit of time moving around the GUI.  It was suggested to me that I use this for my next write up and I never got around to it, until today.

Enjoy

 

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