09-27-2011 07:39 PM - edited 03-07-2019 02:28 AM
I have an issue with a 3560 in my network, after sometimes it fails to give out power to some ip phones,while others are not affected and below is the message i get
"Power given, but Power Controller does not report Power Good"
output of sh power inline and sh env all : everything seems to be ok on the switch
#sh power inline
Available:450.0(w) Used:48.0(w) Remaining:402.0(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/1 auto off 0.0 n/a n/a 15.4
Gi0/2 auto off 0.0 n/a n/a 15.4
Gi0/3 auto off 0.0 n/a n/a 15.4
Gi0/4 auto off 0.0 n/a n/a 15.4
Gi0/5 auto off 0.0 n/a n/a 15.4
Gi0/6 auto on 9.6 AIR-AP1131AG-E-K9 3 15.4
Gi0/7 auto on 9.6 IP Phone 7940 n/a 15.4
Gi0/8 auto off 0.0 n/a n/a 15.4
Gi0/9 auto off 0.0 n/a n/a 15.4
Gi0/10 auto off 0.0 n/a n/a 15.4
Gi0/11 auto on 9.6 IP Phone 7941 2 15.4
Gi0/12 auto off 0.0 n/a n/a 15.4
Gi0/13 auto off 0.0 n/a n/a 15.4
Gi0/14 auto off 0.0 n/a n/a 15.4
Gi0/15 auto off 0.0 n/a n/a 15.4
Gi0/16 auto off 0.0 n/a n/a 15.4
Gi0/17 auto on 9.6 IP Phone 7961 2 15.4
Gi0/18 auto on 9.6 IP Phone 7975 3 15.4
Gi0/19 auto off 0.0 n/a n/a 15.4
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/20 auto off 0.0 n/a n/a 15.4
Gi0/21 auto off 0.0 n/a n/a 15.4
Gi0/22 auto off 0.0 n/a n/a 15.4
Gi0/23 auto off 0.0 n/a n/a 15.4
Gi0/24 auto off 0.0 n/a n/a 15.4
#sh env all
FAN is OK
TEMPERATURE is OK
Temperature Value: 18 Degree Celsius
Temperature State: GREEN
Yellow Threshold : 49 Degree Celsius
Red Threshold : 59 Degree Celsius
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1 C3K-PWR-750WAC DTN1233E1KB OK Good Good 300/450
SW Status RPS Name RPS Serial# RPS Port#
-- ------------- ---------------- ----------- ---------
1 <> <>
It's solved by a reboot of the switch, i need your assistance to know what exactly is wrong and how solve this issue once for good, i could have suspected a power environnment issue but it's the only equipement disturbing in the network.
09-27-2011 08:32 PM
What IOS are you running?
Can you do the following:
1. Command: test cable tdr int
2. Wait for about 5 to 7 seconds;
3. Command: sh cable tdr int
4. Post the complete output please.
09-28-2011 01:06 AM
below the ouput for 2 ports
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/2 auto Pair A 38 +/- 1 meters N/A Short/Impedance Mism
Pair B 42 +/- 1 meters N/A Open
Pair C 38 +/- 1 meters N/A Short/Impedance Mism
Pair D 48 +/- 1 meters N/A Short/Impedance Mism
TDR test last run on: September 28 08:47:45
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/17 auto Pair A 149 +/- 1 meters N/A Normal
Pair B 151 +/- 1 meters N/A Normal
Pair C 35 +/- 1 meters N/A Short/Impedance Mism
Pair D 21 +/- 1 meters N/A Short/Impedance Mism
The strange thing is, even when the phone is directly connected to the switch it still doesn't work unless I reboot the switch
09-28-2011 03:36 AM
Did you tried in any other port? What was the result?
Regrads,
Sunil
09-29-2011 05:06 PM
I've tried but it doesn't work until i reboot the switch
2011/9/28 sunkhann
**
Cisco Support Community <> Re: Switch 3560 not giving out power created by Sunil>
Khanna <> in *LAN,>
Switching and Routing* - View the full discussion<>>
09-27-2011 11:13 PM
I have seen this message sometimes..It generally happens when switch boots up and all the devices request for power together...Mostly reload of the box solves the issue
09-28-2011 01:58 AM
and the IOS version is Version 12.2(35)SE5
09-28-2011 03:29 PM
Mostly reload of the box solves the issue
Sorry Ankur. I will have to disagree with you on this as I see this on a daily basis.
The TDR result is very "accurate". Pair C and D both shows signs of bad cabling.
Pair C controls PoE and Pair D controls GigabitEthernet.
The error message of "Short/Impedance Mism" is not good. A good result to a patched outlet is "Normal".
Another thing: Take a look at the distance of Pairs A & B. This figure is not THAT accurate but it does give me a worry that the cabling at the far end could be faulty or the patch port at the far-end could be faulty.
NOTE: Whoever thought about putting a TDR into the switches deserve a raise. You have no idea how much money we saved with this function.
09-29-2011 02:11 AM
Hey,thanks leolaohoo for correction...I also face these issues regularly..Can you refer to any document which tells how to debug them,ot has more info on above commands ?
How about writing a blog article on this troubleshooting ?
09-29-2011 03:39 PM
Can you refer to any document which tells how to debug them,ot has more info on above commands ?
To be honest with you, the Cisco documents for the TDR is very, very vague. My experience with this feature has all been through trial-and-error. If I publish a "blog", is there a way for the document be vetted and the original document be improved or updated?
10-09-2011 05:00 AM
Hey Ankur,
I've finished a Guide. I'm going to submit the docu to the NetPro/CSC administrator for approval.
10-11-2011 03:11 PM
10-12-2011 11:44 PM
Hey thanks a lot..Thats very useful document..I'm in the process of trying somethings from your document..Will get back in documents section..Thanks again
10-13-2011 01:13 AM
Hi Ankur,
Please provide feedback so I can improve the document.
Sent from Cisco Technical Support iPhone App
09-29-2011 02:38 AM
Reloading the switch frequently is my real issue,
Have a look a this test, i connected the phone directly to the switch with a pretested cable, does the result below shows that the ports have issues ?
TDR test last run on: September 28 09:49:33
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/20 auto Pair A 2 +/- 1 meters N/A Short/Impedance Mism
Pair B 2 +/- 1 meters N/A Open
Pair C 9 +/- 1 meters N/A Short/Impedance Mism
Pair D 21 +/- 1 meters N/A Short/Impedance Mism
voice-data-3560-yde#
TDR test last run on: September 28 09:51:21
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/22 auto Pair A 2 +/- 1 meters N/A Open
Pair B 2 +/- 1 meters N/A Short/Impedance Mism
Pair C 11 +/- 1 meters N/A Short/Impedance Mism
Pair D 6 +/- 1 meters N/A Short/Impedance Mism
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