Power Controller reports Short detected

[balamurugan48011]

Dear All,

                  I am facing the below issue in my 3650 switch, Kindly help us resolve this?

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

Regards,

Bala

[Leo Laohoo]

Do this:  

1.  Command:  test cable tdr int Gi1/0/35; 

2.  Wait for 5 to 7 seconds; 

3.  Command:  sh cable tdr int Gi1/0/35; and

4.  Post the output to #3.

[balamurugan48011]

Please find

TDR test last run on: March 30 08:47:45

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/35 auto Pair A N/A N/A Normal
                       Pair B N/A N/A Normal
                      Pair C N/A N/A Normal
                      Pair D N/A N/A Normal

[Leo Laohoo]

If that's "Normal" how come the speed is "auto"?

[balamurugan48011]

yeah , its auto only, please find the below for your reference

DIR-G-SW-3650-01#sh int gi1/0/35
GigabitEthernet1/0/35 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 00c8.8b70.2723 (bia 00c8.8b70.2723)
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

[Leo Laohoo]

No output packets.  No input packets.  

Is there anything plugged into this port?

[balamurugan48011]

yes leo, nothing has been connected to the port, from the port one cable has been connected to patch panel only. 

Temporary i was removed the cable from the switch port,after that no issues found.

[Leo Laohoo]

So why bother running a TDR if nothing is connected to the port of the switch?

[christopher.johnson@mci.com]

Why would I get the flood of these alarms for a port that doesn't have anything connected?

Feb 12 00:13:13: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected
Feb 12 00:14:33: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected
Feb 12 00:17:13: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected
Feb 12 00:19:00: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected
Feb 12 00:20:10: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected
Feb 12 00:22:21: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected
Feb 12 00:22:50: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected
Feb 12 00:23:19: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/12: Power Controller reports Short detected

GigabitEthernet1/0/12 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 002a.10b8.788c (bia 002a.10b8.788c)
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 3d02h, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
251703 packets input, 32819787 bytes, 0 no buffer
Received 5787 broadcasts (4874 multicasts)
0 runts, 0 giants, 0 throttles
2 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 4874 multicast, 0 pause input
0 input packets with dribble condition detected
3463525 packets output, 454687863 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

[fracjackmac]

Hello christopher.johnson@mci.com,

My suspicion: the cable, from the switch to the patch panel, likely had one or more defective pairs that intermittently produced a short.

Your log messages don't include any information about the interface changing state from down to up, but if it had shown this transition, then it could also be that a cable was plugged into the other side of the patch panel appearance, and that cable had one or more defective (shorted) pairs.

fjm / vrs

@ittybittypacket