Catalyst 2960X / No PoE on some ports

[sharlino]

Hello! I have a WS-C2960X-48LPS-L and some of Panasonic VoIP phones (which are same model, same software, Class1 of PoE). Everything is okay, except there is no PoE on some switch ports.

What i have:

1. An IP phone directly connected to the switch via UTP Cat5e straight-through cable, 0.5m length to port 21 is getting the power from the switch. -> the phone is not faulty

2. The same phone connected with the same cable to port 24 is NOT getting the power from the switch. Moreover, I tried 5 different cables, no luck. Port 24 is just not putting the power into the wire. -> the problem is not in the cable itself.

3. Both ports 21 and 24 has identical configuration.-> the port 24 is maybe faulty.

4. show power inline command shows that remaining watts budget is 322.6/370. -> the switch has enough power budget to support this phone.

5. I tried "soft" reboot via reload command, no luck.

6. I tried "hard" reboot via plug out/in power cord, no luck.

7. I have upgraded the switch from 15.2(2)E5 to 15.2(4)E1, no luck.

8. I have read carefully this information and did all kind of debug ilpower, still have no clue.
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/g_power_over_ethernet.html
https://supportforums.cisco.com/discussion/12343611/poe-not-working-all-ports-2960s-switch

9. Problem ports are 1,20,24.

Unfortunately, at a given time we do not have Smartnet for this 2960. So I can't open a case in the TAC. If anyone could help me, I will be very appreciate for that.

[paul driver]

Hello

Unfortunately  it seems the port is faulty- 

This has been discussed  a few time on here have a looks at these threads-

https://supportforums.cisco.com/discussion/13184056/2960x-power-inline-faulty-interface

Cisco troubleshooting poe guide
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/g_power_over_ethernet.html


res
Paul

[sharlino]

Thank you Paul, I did read that troubleshooting guide. Regarding the first link - it seems I have 3 PoE-dead ports.

[rudi]

Hi, I repair Cisco switches for a living. The problem is fuses inside the Ethernet connector block. If you put a faulty device on the port, it blows the fuse. It is not easy to replace. Most of the time you have to remove the connector block and replace it.

[Jaderson Pessoa]

Well... as everybody told to you.. maybe it is a port faulty. Have you tried to force POE on it? for exemple: power inline static max max-wattage interface configuration command.

Regards,

[suraj2]

The last solution i tried for faulty POE and POE off was i switched the port among the POE faulty ports and some to new ports. Its working and for 1 device i didn't do that before but i recently did it. Its working and i am sorry that i do not have any commands to solve this issue but what i did is quite reliving for the moment. Might work for someone and i really do not have an idea why is it happening. if there further more solution please suggest me too as i am not sure for how long my last applied solution would last.

[RickHollmer]

I have the exact same problem.  I disagree that it's the fuse or the cable.  I can remove a device from say Gi2/0/39 like I just did and move it to Gi2/0/40 and it works.  Then I had another on Gi2/0/1 and moved it to Gi2/0/39 and it worked.  Same Cisco 7841 phone.  My 2960 is also running WS-C2960X-48FPD-L 15.2(2)E5 C2960X-UNIVERSALK9-M.  

It's the strangest thing I've seen in a while.  Switch 1 in the stack doesn't seem to have this problem on any port.  I have also tried rebooting it but I never did try and force power.  Maybe I'll try that next time I see it.  Is there any chance I'll blow out that phone?

Thanks,

Rick Hollmer