Three of the Top 11 Network Troubleshooting Tips (by Tony Fortunato)
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Hunting For MAC Addresses In a Switched Environment (by Tony Fortunato)

I was working with a customer after a switch upgrade and we noticed some ports going off and online.

The natural reaction is to ask, “who is that and is it a problem”.

The new switches weren’t added to the management system, so I showed them how to do it manually and they were very grateful.

So in this video I walk you through how to determine the MAC, IP address and device name.




Here are some of the switch commands I used:

sh log

sh run int gig 2/0/13

sh mac address-table interface gig 2/0/13

sh arp | inc 0026.228e.8c85

conf t

int gig 2/0/13

description Cable E - Sues Desk



sh run int gig 2/0/13

Here is the Microsoft commands

nbtstat -A

Lastly, here are the various links to me;

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Certified Wireshark and Fluke Instructor