Controller port error, Interface Gi1/0/5: Power Controller reports power Imax error detected

[Mohammad Ramadan A.Hafiez]

Hello Guys,

               I have received a call complaining an ip phone down and after checking the logs "phone worked again" I found this log on the 2960 switch...

Controller port error, Interface Gi1/0/5: Power Controller reports power Imax error detected

What does this means? have the employee tried to connect something to this port of the PC port on the phone? what are reasons that a log like this may occure because of.

Notice:

     The logs before this time stamp of the occurence didn't mention any thing aout this port going down because of cable un plugging.

[Mark Malone]

Hey

Is that a Non Cisco IP phone ? Its an issue with how the switch is recieving teh POE what is the phone , may need a POE injector if its not using same stanards as your switch

what POE type does the phone use , was it up before yes , what POE is avilable on the 2960 , show power inline

Its not your user anyway most likely  :)

[Mohammad Ramadan A.Hafiez]

Hello Mark,

         Thanx for the reply.

about the device type, just cisco 7965 ip phone.

Gi1/0/5   auto   on         12.0    IP Phone 7965       3     30.0 

my douts that the user may connected not allowed device, but the switch logs didn't mention anything about this port up/down befor this log timestamp am adking about.

TIA

[Mark Malone]

Well you can stop him doing that by using port security and lock down the port to his pc and mac address only

If theres no logs chances of you finding out now unless hes honest are slim , as the device is up and working looks fine from output

7965s use poe class 3 which is fully supported on 2960s , could of just been a glitch too i do get phones dropping off the odd time too on some of my 6500 blades at access layer

https://supportforums.cisco.com/t5/network-infrastructure-documents/how-to-configure-port-security-on-cisco-catalyst-switches-that/ta-p/3132907#toc-hId--1446074684

Like example for ps

Switch(config)# interface gig0/2

Switch(config-if)# switchport port-security

Switch(config-if)# switchport port-security maximum 1

Switch(config-if)# switchport port-security mac-address 00-d0-ba-11-21-31

Switch(config-if)# switchport port-security violation shutdown

Switch(config-if)#end

[Mohammad Ramadan A.Hafiez]

Hello Mark,

Actually the port security and sticky to the phone mac addresss is already applied, which make me wonder why the switch didn't report the violation.

wiered, isn't it? :)

[Mark Malone]

should have seen something in it then logs then if it violated thats bit odd what did the port look like when you logged in was it down/down or err-disabled ?

[Mark Malone]

Aswell what way is your logging setup , if you pull another phone or replicate the issue are you seeing logs with that for violations

[Mohammad Ramadan A.Hafiez]

Hello Mark, 

No violation has occured to the port, just port went down.

after testing the phone on another port "that what I've been told" the phone was working fine "ofcourse violation has been occured on the port and handled it", the phone is back on it's original port with new cable and it worked.

[Mark Malone]

As Leo said it could have been a bug too

[Leo Laohoo]

Exactly what model of the 2960-series is this? There are known bugs about this involving 2960X.

[Mohammad Ramadan A.Hafiez]

Hi Leo,
the model is WS-C2960S-48FPD-L

[Leo Laohoo]

Ok, so this is a 2960S. Now what is the complete IOS version?

[Mohammad Ramadan A.Hafiez]

The version is:
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 52 WS-C2960S-48FPD-L 15.0(2)SE10a C2960S-UNIVERSALK9-M

[Leo Laohoo]

Do this:
1. Command: test cable tdr interface Gi1/0/5;
2. Wait for about 5 to 7 seconds;
3. Command: sh cable tdr interface Gi 1/0/5; and
4. Post the complete output to #3.

[Mohammad Ramadan A.Hafiez]

Hello Leo,

               in orrder to have the phone working again, we had to change the cable.

but if you still want the command output, I ran it and it was as follow:

EDGE-18#show cable-diagnostics tdr int gi 1/0/5
TDR test last run on: September 12 14:50:26

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/5 1000M Pair A 65 +/- 0 meters Pair A Normal 
Pair B 71 +/- 0 meters Pair B Normal 
Pair C 72 +/- 0 meters Pair C Normal 
Pair D 70 +/- 0 meters Pair D Normal

____________________________________

Am not familiar with this command, what does it tell you please?.

TYIA