CLI PoE

[Weverton Aranha]

Hello,

Is there a way to identify if a switch port is burned via CLI?

I have a 2960-48PST switch and some ports don't provide power to a PoE device connected. When I change the port, the device turns on.

[Edwin Summers]

There may be a POST or other test that would who if a port has been damaged.  Might want to verify that the port has not be shut down or inline power disabled to the port first.  The following link may help with the troubleshooting:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/troubleshooting/g_power_over_ethernet.html

Best regards,

Ed

[faalfaro]

Hi,

If it works in other ports, there might be a hardware issue with the port itself. You should try using another POE devices in that port, so that you can confirm a port failure. You should be able to check the hardware diagnostics with the "show diagnostic results " command. Once you connect the POE device in the faulty port, issue the show power inline command and verify the power in the port.

Also run captures in the non working and the known working port and take a look of the LLDP/ CDP negotiation and try to identify the differences between them.

[Leo Laohoo]

Is there a way to identify if a switch port is burned via CLI?
 
I have a 2960-48PST switch and some ports don't provide power to a PoE device connected. When I change the port, the device turns on.

Use the CLI "sh power inline".

Sounds like you have a possible cable issue.  Have you tried using TDR?

Be aware that the PoE ports of the 2960 is 10/100BaseTx so which means that you can't test the vital 3rd pair.

The only way to test the 3rd pair is to move the patch cable to the non-PoE ports (which happens to be GigabitEthernet).