Enabling 802.3at at C9200L-24P-4X

[jobe83]

Dear all,

I've set manually a specific port, in which have a non-Cisco WiFi 6 Access Point running, to provide 30W to make the PoE+ runs, but the AP itself didn't recgonize the power provided as PoE+.
I've adjusted at web interface as well at CLI. Is there any specific command in which I'm missing?

Also I followed the instructions at https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9200/software/release/16-12/configuration_guide/int_hw/b_1612_int_and_hw_9200_cg/configuring_poe.pdf

I appreciate any support in advance.

[acampbell · Accepted solution]

Hi,
From your config guide for POE

It looks like you may need to enable LLDP

With PoE+, powered devices use IEEE 802.3at and LLDPpower with media dependent interface (MDI) type,
length, and value descriptions (TLVs), Power-via-MDI TLVs, for negotiating power up to 30 W. Cisco
pre-standard devices and Cisco IEEE powered devices can use CDP or the IEEE 802.3at power-via-MDI
power negotiation mechanism to request power levels up to 30 W.

You could try:-

conf t
!
!
lldp run
!
int gig x/x/x
lldp transmit
lldp receive
!
end

Hope this helps

[jobe83]

Hello Alex,

It worked! I appreciate your help a lot!

Thank you so much!!!

[brian.koomen]

Your recommendation work for me as well.  But does bring up the question of using the "power inline static" command.  When I used that command, the port showed 30W being used.....but AP still showed insufficient power....

Why doesn't the "static" command work without the LLDP config? 

Per the documentation:

static —Enables powered-device detection. Pre-allocate (reserve) power for a port before the device discovers the powered device. The device reserves power for this port even when no device is connected and guarantees that power will be provided upon device detection.

[brian.koomen]

It works but after I reload the switch or power off/on the switch, my Sophos APs go back to "insufficient power"

When looking at the config of the interface, I do not see the LLDP configurations I made.   I enter the LLDP configurations again, and the AP then gets sufficient power.....    What am I missing?   We have C9200-48P running IOS 17.09.04a  

[brian.koomen]

Ran into an issue with a class 4 device.  If the switch was reloaded or power cycled with a Sophos 420e AP still plugged in, the AP would show insufficient power.  I had to enter the following for the interface that the Sophos AP was connected to:

power inline port 2-event

Using this config, give the AP sufficient power even after power cycle or reload of the 9200 switch.....

[jobe83]

Hello Alex,

It worked! I appreciate your help a lot!

Thank you so much!!!