How to remotely view serial numbers in a Cisco switch

Putty in to the switch and run the following command to read the chassis serial number:

show sprom backplane

Run the following command to read card serial numbers:

show module

How to list active and inactive ports on Cisco switches

show int status will display all ports and their status show int status | inc notconnect will display all ports that are currently inactive show int status | inc connect will display all ports that are currently active

show int link will display all ports and how long they've been inactive show int link | exc 00 will display all ports that are currently inactive and the duration of how long they've been inactive

How to find IP address and port of device attached to a CISCO switch

Connect to the switch

ping 192.168.1.x -- ping device
show ip arp | inc 192.168.1.x -- look for the mac address
show mac-address-table | Inc 0000.2222.3333 -- use mac address from the ARP table

The result will be something like this

192.168.1.x    00:17:32  0000.2222.3333  e1/10