topic Re: CW9176D1 and POE injectors in Wireless

CW9176D1 and POE injectors

jht_troy — Wed, 28 May 2025 15:49:09 GMT

Hey everyone, I'm having issues with this new access point and a poe injector. I'm trying to get this to be in full power mode, although my switches are a bit old. they are MS350-48FPs. I only have one power supply in the back of it and I don't believe it supports up to 30 watts per port? If I'm wrong I can't find it on the datasheet anyways, and I was wondering if anyone else has had similar issues. I'm trying to get this ap to be at 30 watts but when I mess with the radio settings after putting the POE injector in place it still can't get out of low power mode, and then it just seems to stop responding until I turn the radio settings back to auto instead of manual.

I'm a little stumped so if anyone has any tips or some solutions they can point me in I'd greatly appreciate it!

Re: CW9176D1 and POE injectors

aleabrahao — Wed, 28 May 2025 16:00:39 GMT

The MS350-48FP switch supports 802.3at (PoE+), which provides up to 30W per port. The actual power per port depends on, the total power budget of the switch and the number of active PoE devices.

https://documentation.meraki.com/MS/MS_Overview_and_Specifications/MS350_Overview_and_Specifications

Have you tested with a PoE+ injector?

Re: CW9176D1 and POE injectors

jht_troy — Wed, 28 May 2025 16:11:04 GMT

Yep I have a poe injector on it right now and the access point even when set to manual power settings won't go above 14/15 watts.

Re: CW9176D1 and POE injectors

jht_troy — Wed, 28 May 2025 16:11:53 GMT

I should say that I do not have both power supplies in the switch which is why I'm attempting to use a POE injector now.

Re: CW9176D1 and POE injectors

aleabrahao — Wed, 28 May 2025 16:22:01 GMT

What is you Power Injector model?

Re: CW9176D1 and POE injectors

jht_troy — Wed, 28 May 2025 16:50:15 GMT

MA-INJ-4 I believe so

Re: CW9176D1 and POE injectors

aleabrahao — Wed, 28 May 2025 16:53:01 GMT

This one is not recommended and is not supported.

https://documentation.meraki.com/MR/MR_Overview_and_Specifications/CW9176I_%2F%2F_CW9176D1_Datasheet#Specifications

Re: CW9176D1 and POE injectors

ww^ — Wed, 28 May 2025 17:12:04 GMT

https://community.meraki.com/t5/Wireless/CW9176-Power-Issues/m-p/270912

Re: CW9176D1 and POE injectors

jht_troy — Wed, 28 May 2025 17:13:48 GMT

Well I think you solved my problem! Hahaha I appreciate the thorough explanation @alessandrodematos

Re: CW9176D1 and POE injectors

ppurroy — Wed, 28 May 2025 18:42:33 GMT

Hi,

MS350-48FP are 802.3at which will provide 30Watts per port unto 740Watts total. The CW9176D1 to be in full power needs 39Watts with 802.3bt.

With 802.3at the AP will operate at low power mode, this means:

- USB port will be disabled.

- mGig ethernet port will be limited to 2.5Gbps, which should not be an issue as the MS350-48FP does not support mGig.

- 2.4Ghz radio will operate at 2x2 instead of 4x4. IMHO we should all strive to disable the 2.4GHz radios anyway.

https://documentation.meraki.com/MR/MR_Overview_and_Specifications/CW9176I_%2F%2F_CW9176D1_Datasheet#9176D1_Power_Negotiation_and_Features

The MA-INJ-4 power injector is also 802.3at with the same caveats listed above for the MS350-48FP.

Regards,