POE errors on C2960XR

[Simon0754]

Hello,
I’m creating this post because I get a problem with my new C2960XR switches. Indeed, POE is not working well. I am migrating from a C3750 switch and POE works fine for the same devices with this switch. Configuration is the same for both devices.
To be more precise, I get trouble with the POE of some IP phones. The IP phone doesn’t start and I get these lines in the switch logs:

May 3 08:59:45.129: %ILPOWER-7-DETECT: Interface Gi1/0/23: Power Device detected: IEEE PD
May 3 08:59:45.129: %ILPOWER-7-DETECT: Interface Gi1/0/23: Power Device detected: IEEE PD
May 3 08:59:46.149: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/23: PD removed
May 3 08:59:46.149: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/23: Power Controller reports power Tstart error detected

Here are troubleshoots:

#show power inline gigabitEthernet 1/0/23
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/23 auto faulty 0.0 n/a n/a 30.0

Interface AdminPowerMax AdminConsumption
(Watts) (Watts)
---------- --------------- --------------------
Gi1/0/23 30.0 15.4

#show cable-diagnostics tdr interface Gi1/0/23
TDR test last run on: May 03 09:19:59

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/23 auto Pair A N/A N/A Normal
Pair B N/A N/A Normal
Pair C 33 +/- 10 meters N/A Short
Pair D 34 +/- 10 meters N/A Short

I have changed the wires, and it is not the problem. I have tried to disable CDP and LLDP on the ports, but same problem. I've tried to enable "power inline port 2x-mode" but it didn't solve the problem.

Here are my switch information (I have changed the software but no change):
- Model : WS-C2960XR-48FPS-I
- SW : 15.2(4)E6

Could you help me to solve this POE problem ?
Thanks in advance.

[Mark Malone]

HI

what type of phones are they the model ?

whats the power supplies currently in the 2960 compared to the power supplies in the 3750 ?

Table 6.       Power supply options for Cisco Catalyst 2960-XR Series Switches

Part number	Description
PWR-C2-250W AC	FRU power supply and fan for all non-PoE C2960-XR switches, provides 250W AC of power
PWR-C2-640W AC	FRU power supply and fan for all 370W PoE+ C2960-XR switches, provides 640W AC of power
PWR-C2-1025W AC	FRU power supply and fan for all 740W PoE+ C2960-XR switches, provides 1025W AC of power

[Simon0754]

We use MILESYS iPIX-150 IP Phones.

We currently use 2x PWR-C2-1025WAC in our C2960XR. I've tried with only 1 power supply and same result. 80% of the POE devices are working fine, but 20% are not powered up : if I reboot the switch, it's not always the same equipments that work and do not work : it is random

[balaji.bandi]

Not sure you hitting with this bug :

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvf12964?emailclick=CNSemail

[Leo Laohoo]

The issue is the cable nearest the switch. Either the patch cable (nearest the switch) or the punch block (again, nearest the switch).

[Simon0754]

I've tried to connect the POE devices directly to the switch (so whitout using the building patch pannel) with 2m and 3m wires. I have the same problem. I've tried Cat6, Cat6A and Cat7 cables. If I connect the same cable on an old Catalyst 3750 it works fine. If I reconnect the cable on the C2960XR it doesn't work.

Is there less security on POE on the old Catalyst switches?

[Mark Malone]

maybe theres a fault on the switch itself the amount of power its able to give out is being limited somehow