PoE on C1121-8PLTEP

[peter.shafer]

Hi,

We have started using C1121-8PLTEP in our branches.

Today needed to use the PoE for the first time. Cannot get power on any of the 8 ports.

This looks ominous:
sh power
Main PSU :
Configured Mode : N/A
Current runtime state same : N/A
PowerSupplySource : External PS
POE Module :
Configured Mode : N/A
Current runtime state same : N/A
Total power available : 0 Watts

sh ver
Cisco IOS XE Software, Version 17.03.03
Cisco IOS Software [Amsterdam], ISR Software (ARMV8EL_LINUX_IOSD-UNIVERSALK9-M), Version 17.3.3, RELEASE SOFTWARE (fc7)

I suspect there is something required to enable it. But cannot find where/how.

Any assistance would be greatly appreciated

Thanks in advance

Peter

[Leo Laohoo]

Post the complete output to the command "sh inventory".

[peter.shafer]

Thanks Leo. Here you are:

sh inventory

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
INFO: Please use "show license UDI" to get serial number for licensing.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

NAME: "Chassis", DESCR: "Cisco C1121-8PLTEP Chassis"
PID: C1121-8PLTEP , VID: V01 , SN: FGL2517L7PZ

NAME: "Power Supply Module 0", DESCR: "External Power Supply Module"
PID: PWR-12V , VID: V01 , SN: JAB0929092D

NAME: "module 0", DESCR: "Cisco C1121-8PLTEP Built-In NIM controller"
PID: C1121-8PLTEP , VID: , SN:

NAME: "NIM subslot 0/2", DESCR: "P-LTEA-LA Module"
PID: P-LTEA-LA , VID: V03 , SN: FOC25133LM2

NAME: "Modem on Cellular0/2/0", DESCR: "Sierra Wireless EM7430"
PID: EM7430 , VID: 1.0 , SN: 355813071220716

NAME: "NIM subslot 0/0", DESCR: "Front Panel 2 port Gigabitethernet Module"
PID: C1121-2x1GE , VID: V01 , SN:

NAME: "NIM subslot 0/1", DESCR: "C1121-ES-8"
PID: C1121-ES-8 , VID: V01 , SN:

NAME: "module R0", DESCR: "Cisco C1121-8PLTEP Route Processor"
PID: C1121-8PLTEP , VID: V01 , SN: FOC24342PPD

NAME: "module F0", DESCR: "Cisco C1121-8PLTEP Forwarding Processor"
PID: C1121-8PLTEP , VID: , SN:

[Leo Laohoo]

Did someone removed the PoE Daughterboard from the router?  

[peter.shafer]

Thanks for the reply Leo. I am really hoping it is not an optional extra that simply wasn't purchased. Certainly nobody has removed it.

I will re-investigate the BoM.

Thanks

Peter

[Leo Laohoo]

---

@peter.shafer wrote:

Thanks for the reply Leo. I am really hoping it is not an optional extra that simply wasn't purchased. Certainly nobody has removed it.

---

The router has a product ID of "-8P".  That means PoE.  

The power supply is already the four-prong PoE-capable.  
The only thing I can think of is: 

1. The PoE Daughter Board is faulty; 
2. Someone removed the PoE Daughter Board but forgot to tell anyone; or
3. Factory forget to install the PoE Daughter Board.

[peter.shafer · Accepted solution]

So, it seems it is an option. Great Data Sheet Cisco. In the "Product Specifications" table, no mention of the optional module.

And we missed it at the top of the doc: Platform architecture and capabilities.

Going to be an interesting conversation.

Thank You Leo for pointing out our stupidly obvious error.

Cheers

Peter

[claytonsmith]

We had a similar experience with our Cisco 1121s. I have had 2 Sites have issues with POE on these models. Turns out, Swapping the power brick in the back fixed it. They come with a big power brick and that usually is the culprit. When doing a show power command, It would show 0 Watts available. After the power brick swap, it would have watts available. I guess they burn out or something, or maybe we are just unlucky. Hope this helps. 

-Clayton