I would like to know what is the most effective way to detect the source of a L2 local loop on a LAN causing high CPU for several switches and big slowdowns on the network. I was thinking about two differents ways but not sure they work:
- Perform a sh-mac-address on the switches to look at the duplicate mac-address ?
- Capture the traffic ? (Quite difficult on a big LAN when you have no idea of where the loop could be !)
Don't hesitate to let me know what you think about it. I just would like to know how to react before it happens on my LAN (... and unfortunately i'am sure it'll happen one day ;) )
Thanks in advance for your reply,