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Thursday, February 28, 2013

UTC: %ILPOWER-3-CONTROLLER_PORT_ERR. Imax error

Our 3560 switch w/ IOS 12.2(35)SE have below message last night.  

Sep 23 18:54:58.468 UTC: %ILPOWER-7-DETECT: Interface Fa0/10: Power Device dete
ted: IEEE PD
Sep 23 18:54:58.468 UTC: %ILPOWER-5-INVALID_IEEE_CLASS: Interface Fa0/10: has d
tected invalid IEEE class: 7 device. Power denied
Sep 23 18:57:37.542 UTC: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error,
Interface Fa0/12: Power Controller reports power Imax error detected
Sep 23 18:57:44.580 UTC: %SWITCH_QOS_TB-5-TRUST_DEVICE_LOST: cisco-phone no lon
er detected on port Fa0/12, port set to untrusted.
Sep 23 18:57:48.674 UTC: %ILPOWER-7-DETECT: Interface Fa0/12: Power Device deteted: Cisco PD
Sep 23 18:57:48.741 UTC: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Fa0/12: Power Controller reports power Tstart error detected

This error indicates that PD is drawing over-current more than allowed/supported per IEEE 802.3af standard.

Log:
Sep 21 22:25:13.675 GMT: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Fa0/15: Power Controller reports power Imax error detected

What type of the device are connected to interfaces where you are seeing this error?
Do you use any kind of POE splitter on the interface?

This issue is looks like it is matching with known bug CSCsw18530

CSCsw18530 - Power Imax / Tstart errors may be reported with some third party PDs

Symptoms:
Power Imax / Tstart errors may be reported with some third party PDs

%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Power Controller reports power Imax error detected

%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/35: Power Controller reports power Tstart error detected

Conditions:
Seen with some of the 3750,3750G,3750-E,3560-E, 3750-X, 3560-X, 3560-C, 2960S, 2960,2960C switches

Workaround:
Longer cable (>50ft) seems to fix the issue in most cases.

Solution
This issue is fixed in 12.2(55)SE3 , 12.2(58)SE1 and later releases. The following  interface configuration commands have to be applied to resolve the issue,

Switch(config)# int x/y
Switch(config-if)# power inline port 2x-mode
Switch(config-if)# shut
Switch(config-if)# no shut

The fix is present in the following platforms only :
3750-E, 3560-E, 3750-X, 3560-X, 3560-C, 2960S, 2960,2960C. The other platforms do not support 2X power mode and the workaround would be to use a longer cable.

If you see any abnormal behavior on PoW, use the show inline power and show inline power detail privileged EXEC commands to compare the number of connected powered devices against the switch power budget (available PoE). Verify that switch power budget can power the device.

Note:
If the switch power budget is depleted, additional powered devices will not power-on when connected to a PoE port. CDP (Cisco Discovery Protocol) helps identify Cisco devices and correctly establish the switch power budget.

Please click here for more details on "Troubleshooting Power over Ethernet (PoE).

 

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