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How to inspect used network switch?

TheGeeker
By TheGeeker
in Networking
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I am planning on purchasing a used Sg-300-28 Cisco switch for 80 USD. It seems too good to be true but I am going to test it (with a buddy) and make sure it works but what is the best way to test it? I am new to netowrking and as this is my first real experience with anything outside of 20$ cheap junk I do not know how to test it. Do I need to test all ports? 

 Just because you don't care, doesn't mean other others don't. Don't be a self-centered asshole. -Thank You a PSA from the people who do not say random shit on the internet. 

 

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https://linustechtips.com/topic/700700-how-to-inspect-used-network-switch/
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1 minute ago, Electronics Wizardy said:

The price doesn't seem too off.

 

Id just test each port with a laptop or the like. Also plug into the serial port and make sure you can access the console.

Really? I have only seen them at 150. http://www.ebay.com/itm/Cisco-SG300-28-28-Port-srw2024-k9-Managed-Switch-non-POE-/282265626063?hash=item41b857a5cf:g:1yoAAOSwiDFYNRVq

 Just because you don't care, doesn't mean other others don't. Don't be a self-centered asshole. -Thank You a PSA from the people who do not say random shit on the internet. 

 

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Just now, TheGeeker said:

Really? I have only seen them at 150. http://www.ebay.com/itm/Cisco-SG300-28-28-Port-srw2024-k9-Managed-Switch-non-POE-/282265626063?hash=item41b857a5cf:g:1yoAAOSwiDFYNRVq

Where you buying it? Local surplus places are almost cheaper.

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Just now, Electronics Wizardy said:

Where you buying it? Local surplus places are almost cheaper.

Oh ok. I am getting it from a local company. 

 Just because you don't care, doesn't mean other others don't. Don't be a self-centered asshole. -Thank You a PSA from the people who do not say random shit on the internet. 

 

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Make sure the management interface isn't password protected. Or make sure you can reset the password.

Visually inspect each port and make sure the pins in the connectors are not touching each other, plug cable in each port to make sure the pins are flexible and make proper contact.

If the switch has fan or fans, make sure the fan(s) spin at reasonable speed, if the fans were stuck the internal power supply may have overheated and may have capacitors degreaded/weakened so it could die at some point in the future (you can replace capacitors if you have some skill with soldering irons)

 

If you can open the switch easily, open it and make sure heatsinks (if any) are still glued to chips properly. Sometimes the adhesive breaks down and heatsinks no longer cool chips adequately.

 

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