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Beginner

2960X Poe issue

Hi,

 

I have a five switch stack which, which when plugging in a phone into random ports, its not providing power to it. no errors are logging in show logging.

 

Switch Ports Model                       SW Version   SW Image
------ ----- -----                      ---------- ----------
*1  52    WS-C2960X-48FPS-L    15.2(4)E6     C2960X-UNIVERSALK9-M
2    52    WS-C2960X-48FPS-L    15.2(4)E6    C2960X-UNIVERSALK9-M
3    52    WS-C2960X-48FPS-L    15.2(4)E6    C2960X-UNIVERSALK9-M
4    52    WS-C2960X-48FPS-L    15.2(4)E6    C2960X-UNIVERSALK9-M
5    52    WS-C2960X-48FPS-L    15.2(4)E6    C2960X-UNIVERSALK9-M

 

Has anyone else has this issue or found a fix for it?

 

 

Everyone's tags (2)
10 REPLIES 10
VIP Mentor

Re: 2960X Poe issue

Hello,

 

which phones do you have, what brand/model ? Post the output of:

 

show power inline

 

Does random ports mean the port never works, or sometimes does work, and sometimes doesn't work ?

Beginner

Re: 2960X Poe issue

Hi George,

 

The phones are Mitel 6920.

 

I can plug this into different ports but and have the issue but occasionally they do power up.

 

This is the show power inline output

 

Interface   Admin   Oper    Power  Device           Class      Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----

Gi5/0/1   auto   off        0.0             n/a                 n/a   30.0

 

 

This is what it will show if working 

 

Interface   Admin   Oper    Power  Device           Class      Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----

Gi5/0/18    auto     on         5.0     Aquarius            2        30.0

 

 

Beginner

Re: 2960X Poe issue

Sounds to me like you have a bad PoE controller. We catch stuff like that all the time when testing here. If by chance you bought it from us, you'll have a lifetime warranty and we can replace it for you. Check your warranty with who you bought it from if not. You COULD have a bad cable or bad phone but I am assuming that you are using different cables and phones each time.

 

Craig Haynie - CEO

CablesAndKits

www.cablesandkits.com

Craig Haynie - CEO
CablesAndKits
Hall of Fame Community Legend

Re: 2960X Poe issue

Put the phone back into port Gi 5/0/1 and do the following: 

 

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

Re: 2960X Poe issue

Hi Leo,

 

I have run that test, output is below

 

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi5/0/1 auto  Pair A 2 +/- 10 meters N/A Open
                     Pair B 2 +/- 10 meters N/A Open
                     Pair C 2 +/- 10 meters N/A Open
                     Pair D 2 +/- 10 meters N/A Open

Hall of Fame Community Legend

Re: 2960X Poe issue

TDR output is showing the interface is down because there is nothing connected at the far end (OPEN).
Are you sure this is the correct port?

What happens if you connect the phone(s) directly to the port of the switch?

Beginner

Re: 2960X Poe issue

It's connected directly to the port when I ran the test.
Hall of Fame Community Legend

Re: 2960X Poe issue

The TDR result shows a cable length of about 10 metres but nothing else.
VIP Advisor

Re: 2960X Poe issue

Hello

Do these random ports differ in their configuration to the port that do work? - Such has spanning tree portfast being enable or cdp/lldp



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Beginner

Re: 2960X Poe issue

Hi Paul,

 

No difference in config apart from vlan.

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