Controller port error, Interface Gi3/0/28: Power Controller reports Short detected

[Sandeep Verma]

Hi All,

Recently deployed  Cisco Catalyst 3850-48P-E Stack Switch.  I am receiving a lot of syslog messages 

''''Controller port error, Interface Gi3/0/28: Power Controller reports Short detected''''

Switch Software version : 03.03.02SE RELEASE SOFTWARE (fc2)

I have IP Phones and some access-points on these switches to supply power to. These messages have been populating recently only.

Can anyone kindly help with details of this issue and resolution as well ?

Many Thanks

Sandeep

[Leo Laohoo]

Do this: 

1. Command:  test cable tdr interface Gi3/0/28;
2. Wait for approximately 5 to 7 seconds; 
3. Command:  sh cable tdr interface Gi3/0/28; and
4. Post the output to #3.

[Sandeep Verma · Accepted solution]

Thanks Leo,

Here's the output

TDR test last run on: August 21 09:34:08

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi3/0/28  100M  Pair A     0    +/- 1  meters Pair A      Normal
                Pair B     0    +/- 1  meters Pair B      Normal
                Pair C     2    +/- 1  meters N/A         Open
                Pair D     23   +/- 1  meters N/A         Short

[Leo Laohoo]

Post deleted by author due to low rating by OP.

[Sandeep Verma]

Thanks Leo.....!

[Leo Laohoo]

Annnnd for that you rated my assistance a 4-star?????

[SupportAC]

Hi Leo,

Could you put the post again?

I have the same problem in my device  and I don´t know the cause of the issue.

Thanks in advance.

Regards.

Ivan.

[Leo Laohoo]

Hi Ivan, 

Open a new thread and send me a private message (PM) of the link.   I will be happy to help you.

I will not post the recommendation here because the OP has marked my original recommendation with a low rating.  If other people see my response with a low rating they might think that it's the incorrect or wrong course of action.  

[Charlie Jones]

Hi Leo,

Would you be able to assist me with this same issue?  I am seeing a port with the following error:

Dec 19 09:11:39.405: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi3/0/4: Power Controller reports Short detected

[aukhadiev]

Hi Charlie Jones, 

This is are cosmetic bug CSCuo83872:

https://tools.cisco.com/bugsearch/bug/CSCuo83872

Please see attached pdf...

[Leo Laohoo]

Would you be able to assist me with this same issue? 

Hi Charlie, 

I am happy to assist but please open a new thread.  I am not inclined to make any recommendation on this thread after the OP has rated my troubleshooting and diagnostics with a very pathetic score. 

Anyone who gets to see my response with a low score will think of my post as BS.  

If you are able to create a new thread and PM me the link, I will respond.

[SupportAC]

Hi Leo,

Could you put the post again?

I have the same problem in my device  and I don´t know the cause of the issue.

Thanks in advance.

Regards.

Ivan.

[onlinesaurabh]

@Sandeep Verma

It's a bug man!

[johnnylingo]

I'm seeing this too on a 3650 switch with an AIR-LAP1142N-A-K9 attached.  Was working fine until a few days ago.

Does this indicate someone swapped in a bad cable, or could it be a false positive?  It's in a remote office 8,000 miles away, so visually inspecting this won't be easy. 

#show cable-diagnostics tdr interface gigabitEthernet 1/0/1
TDR test last run on: June 17 12:06:37

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/1   auto  Pair A     1    +/- 1  meters N/A         Short               
                Pair B     1    +/- 1  meters N/A         Short/Crosstalk     
                Pair C     0    +/- 1  meters N/A         Normal              
                Pair D     0    +/- 1  meters N/A         Normal

[Leo Laohoo]

The patch cable nearest the switch is bad, Johnny.  Get someone to replace the cable and chop it up.