No inline power on a 4506-E port.

[octo19777]

Hi,

We have just purchased and installed a 4506-E chassis.  It contains a supervisor, two POE blades and 3 non-poe blades.  Version is 12.2(53)SG1.  Anyhoo, one of the ports isn't providing power to an IP phone.  We can plug the phone into any of the other POE ports and it works fine.  Is there a way to test an idividual port for POE problems?  What could the problem be?  The port works for normal data but will not provide power.

Thanks,

Daniel

[Leo Laohoo]

Try the command "sh power inline" and verify if you have enough power.

[octo19777]

Available:1400(w), Used:37(w), Remaining

:1363(w)

Thanks,

Daniel

[Leo Laohoo]

Ok.  Lots of power left for you.

Can you post the command "sh power in ".

Can you post the command "sh module".

Can you post the config of the interface.

Is CDP enabled globally?

[octo19777]

sh power in g3/17
Available:1400(w)  Used:37(w)  Remaining:1363(w)

Interface Admin  Oper            Power(Watts)     Device              Class
                            From PS    To Device
--------- ------ ---------- ---------- ---------- ------------------- -----

Gi3/17    auto   off        0.0        0.0        n/a                 n/a

Interface  AdminPowerMax   AdminConsumption
             (Watts)           (Watts)
---------- --------------- --------------------

Gi3/17                20.0                 15.4

sh module
Chassis Type : WS-C4506-E

Power consumed by backplane : 0 Watts

Mod Ports Card Type                              Model            

---+-----+--------------------------------------+------------------+-----------
1     6  Sup 6L-E 10GE (X2), 1000BaseX (SFP)    WS-X45-SUP6L-E    
2    48  10/100/1000BaseT Premium POE E Series  WS-X4648-RJ45V+E  
3    48  10/100/1000BaseT Premium POE E Series  WS-X4648-RJ45V+E  
4    48  10/100/1000BaseT (RJ45)                WS-X4648-RJ45-E   
5    48  10/100/1000BaseT (RJ45)                WS-X4648-RJ45-E   
6    48  10/100/1000BaseT (RJ45)                WS-X4648-RJ45-E  

show interfaces g3/17 capabilities
GigabitEthernet3/17
  Model:                 WS-X4648-RJ45V+E-RJ-45
  Type:                  10/100/1000-TX
  Speed:                 10,100,1000,auto
  Duplex:                half,full,auto
  Auto-MDIX:             yes
  Trunk encap. type:     802.1Q
  Trunk mode:            on,off,desirable,nonegotiate
  Channel:               yes
  Broadcast suppression: percentage(0-100), hw
  Multicast suppression: percentage(0-100), hw
  Flowcontrol:           rx-(off,on,desired),tx-(off,on,desired)
  VLAN Membership:       static, dynamic
  Fast Start:            yes
  CoS rewrite:           yes
  ToS rewrite:           yes
  Inline power:          yes (Cisco Voice Protocol/IEEE Protocol 802.3af)
  SPAN:                  source/destination
  UDLD:                  yes
  Link Debounce:         no
  Link Debounce Time:    no
  Port Security:         yes
  Dot1x:                 yes
  Maximum MTU:           9198 bytes (Jumbo Frames)
  Multiple Media Types:  no
  Diagnostic Monitoring: N/A
  Queuing:               rx-(N/A), tx-(1p7q1t)

Thanks,

Daniel

[Leo Laohoo]

Nothing out of the ordinary from your last post.

We can plug the phone into any of the other POE ports and it works fine.

Define "ports"?  Desk ports or directly-connected-to-the-switch ports?

Is there a way to test an idividual port for POE problems?

Ok, let me make a confession.  I'm no expert of the 4500 so please don't get annoyed that this command may not work.  Try performing a cable test from your switch to the phone by using the command "test cable tdr ".  Wait for about 10-15 seconds and perform the "sh cable tdr int ".  If this is possible, can you kindly post the result?

[glen.grant]

     Try another device  like an AP if you have one lieing around.   Try resetting the module with the questionable port .  If this doesn't fix it then get an RMA to get it replaced...

[glen.grant]

     Try another device  like an AP if you have one lieing around.   Try resetting the module with the questionable port .  If this doesn't fix it then get an RMA to get it replaced...

[octo19777]

unfortunatley those commands aren't recognised.  I will try to reset the module.

Thanks,
Daniel

[fjrubiobarcena]

Hello, did the reset worked? have you had the issue again?

One of my customer have a similar problem, some of the poe interfaces from one of the cards stop working. They had an ip phone receiving poe in one port (for example 1/17) if the try to plug another ip phone in other port (1/2) it did not set up. If they change the ip phone from 1/17 to 1/2 it did not work and if the plugged back the ip phone from 1/2 to 1/17 it didn´t work again. After reseting the module it is working ok again all the interfaces, but, I am afraid it could fail again.Do you have any new issue?

I have found this other post: https://supportforums.cisco.com/message/3038815#3038815 . Did it applie to your issue?

[esomarriba]

I have the same issue here. I have 4x SW 4506 and one PoE port is not working

to power the IP Phone. All with port # 25. How did you fix your issue?

[vbuchholz]

Hi Daniel,

I have exactly the same issue that you have described. Did you solve the issue and how did you do that? I'm thinking that perhaps a software update might help, but I can't find any bugs matching the behaviour of the switch module.

Best regards

Volker

[fmoye]

Daniel, I have had just about the same problem.  I was not able to power any new IP Phones from a POE blade.  What was different is I had a wireless unit that has been running for about a month.  I solved the problem by resetting the blade.

Good luck

Fred