When buying a Cisco Switch from Ebay…

Whenever I buy a switch off of Ebay, I always check all the switch ports if they are working or not.
The way I do it, I use the router’s fastethernet port and connect it to each switch port then I will ping the switch’s vlan ip address from the router.  If I get “!!!!!”, then the port is working fine.  If I get the “…..”, then the port is either dead or has problem.

The thing is if the switch has 24 or 48 ports it will take some time to check all ports, so what I always do I added some extra configuration on the switch.

Switch#configure terminal
Switch(config)#int vlan 1
Switch(config-if)#ip address
Switch(config-if)#no shutdown
Switch(config)#interface range fastethernet 0/1 – 48
Switch(config-if-range)#switchport mode access
Switch(config)#spanning-tree portfast default
Switch(config)#interface vlan 1

On the router, I just address the ip address on fastethernet 0/0 then ping each switch ports. With portfast configure, I can ping the switch port once I connect the network cable to each port.

It took me less than five minutes to verify all the 48 ports 🙂

Hope this helps


About networkshinobi

This blog is about the things I learned about computers and networking to help me to remember them as I push further my studies. I created this blog to help myself to continue my education; and if you find this blog helpful for your studies, that is great. That is one of the reasons why I made this blog, to share my interest and knowledge. Also, all the entries/posts I made are based on my views, opinion and for educational purposes only. If you see some mistakes, feel free to drop some comments. I would appreciate all the helpful comments. Thanks BTC: 14wVPFBWNAKmfNsgUrPpw8EytkXFLjxYoU ETH: 0x8528793dF77a57186f5B15dA6DC1eaA3c5e92c4a LTC : LMpW2rGYnYdUwvnHA4huB6TGcPEEc1JzXw
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