R750 Power Needs (Not enough power message)

[roger_federer]

Hey Everyone,

Per the R750 PoE+ power spec I shouldn't be seeing this issue either. I have heard others say they are using a 60W PoE injector. 

Using a...

Cudy 30W Gigabit PoE+ Injector Adapter, IEEE 802.3 at and IEEE 802.3 af Compliant, up to 100 Meters (328 Feet), 10/100/1000Mbps RJ-45, POE150

[roger_federer]

It’s for me at my home but agreed. I have a 60watt injector coming. Yea not going back in firmware. 

Thanks!

[eizens_putnins]

As injectors are just damb power supplies, they power capability can't be known to AP. AP can just try to draw as much is needed and check that voltage is OK.  So I suppose the best way with injectors is always set correct power setting in AP configuration and avoid any auto-detection, which is potential for problems. PoE switches are different, they really negotiate how much power they provide, and anything over 802.3at requires LLDP to work fro my understanding (on both switch and AP). I had in one case huge problem with R730 connected to Cisco Catalyst switches with 802.3at ports -- AP (out of the box) were unable to work, as switch dropped power after a few seconds, and it was not possible to get to AP to configure 802.3at power mode. There was no any other power source on site, it was at night during preparation for next day conference, and I had to drive back to office to bring on-site Alcatel switch and reconfigure APs before installation on network.

Even so R750 is just 4x4 and requires less power than R730 (802.3at is enough for it), it is still better to manually configure power mode. Many injectors on market are not providing what is stated in datasheet, but in this case I suppose this is auto-detection problem, not real power deficit.    

Hope it helps.

[pratul_murarka]

I've a mesh network of R750 which is connected to ZD1200 and the network all R750 APs showing, Not enough electricity power is provided to this ap its capabilities are degraded please refer to user guide for details. how to resolve this. could anyone help me out of this? 

I fed up with this. 

[webcoder]

I edited my AP in Web UI (select AP then Edit button top left) and in Other tab was able to change PoE settings from Auto to 802.3at - this solved the problem and the message is no longer showing. It's used at home and my DrayTek Vigor 2962P is showing 9.2W PoE power consumtion by R750 so not going even above 10W for home use. The error's usually triggered by inability to auto negotiate correct PoE even though it's using less than 15W i.e. 802.3af.

[webcoder]

Hi Guys,

I have the Ruckus R750 (R750) connected to Draytek Vigor 2962P which provides up to 30W per port (on 2 ports). I can see on 2962P that the R750 is currently drawing about 9.2W although am getting the same message that it's underpowered. I've been looking at both Ruckus 902-0180-xxyy 1Gbps (60W at 1.2A) 902-1180-xxyy (60W at 1.2A) 10Gbps power injectors but they're super expensive (£150+) hence this is a no go for this already old AP. I can't find used on ebay or anywhere either and only 902-0162-xxyy that's equivalent what my 2962P provides so it's pointless.

Two other options:

1. I already own at one location NETGEAR PoE Switch 8 Port Gigabit Ethernet Plus Network Switch (GS308EPP) - with 8 x PoE+ @ 123W that I can manually allocate Watts to each port from the 123W pool = should be able to run two of R750 at 60W each.

2. I've found Ubiquiti PoE-50-60W Gigabit Power Over Ethernet PoE Injector (50V/60W) at 1.2A for a mere £28 at broadbandbuyer although it's voltage is exceeded by 2V:

"Ubiquiti PoE-50-60W Power Over Ethernet PoE Injector is suitable for use with Ubiquiti Wireless Networking devices. This Ubiquiti PoE adapter is supplied with a power cord.

Key Features

• Surge protection
• Clamping protection
• Maximum surge discharge
• Peak pulse current
• AC cable with earth ground
• Power over Ethernet adapter with 50V/60W capacity.

"

"Using a 50V PoE injector instead of a 48V one for the Ruckus R750 is generally safe. Most PoE devices, including the R750, have a tolerance range for input voltage. The slight increase from 48V to 50V is within this tolerance and should not cause any issues".

What is your thoughts and where do I set the power on AP manually as could not find any options to do that when log into my R750?

Cheers,
David