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WAX214v2 not detecting POE AT
Hi, I setup a Netgear WAX214v2 POE access point. I connected it to a POE+ unmanaged switch by Steamemo. The switch supports 802.3AF/AT. I purchased it on Amazon. It is the 6Gb 52W 4xPOE+ switch. The WAX214v2 power light is solid amber (POE power is not at the required 802.3 level.) In the AP management there is a banner that states it is connected to a poe AF device and recommends it be plugged into a POE+ AT switch. The AP powers on, broadcasts the SSID, and I get internet from it. The issue is why is the AP saying my switch is not POE+ AT?
My switch is a POE+ AT switch with up to 52w max power to the device. I reached out to Steamemo but I am waiting on a reply. Is there something I am missing or can test? I do not have another POE+ device to test the switch. Since the switch is unmanaged, it does not have a login site to configure the switch settings.
2 Replies
Forerunner225 wrote:
POE+ unmanaged switch by Steamemo. The switch supports 802.3AF/AT. It is the 6Gb 52W 4xPOE+ switch. ,,, My switch is a POE+ AT switch with up to 52w max power to the device.
Let's break down the marketing nonsense:
Total internal switch capacity might be 6 GbE, all ports are 1 GbE, and the PoE can provide a max total of 52W - on all PoP ports.
802.3af does specify 12.95W at the PD, 15.4W at the PSE 802.3at does specify 30W at the PSE, with max. 25.5W available at the PD.
For 802.3at, there is a two-event classification Sequence before power-down:
The first handshake. The PSE detects a connected PD by sending a short low-voltage pulse which determines how much power the PD needs. This pulse is unlikely to damage a non-PoE device. Depending on how much current it draws during this pulse, the PSE classifies the PD into one of classes 0-4 (0-3 / type 1 PSEs and PDs).PoE step down classifications
The second handshake is required for a type 2 PSE to classify the connected PD into class 4 (PoE+ power), informing the PD that full 802.3at power is available.
==>> Here something goes wrong in your deployment!
The PSE now has confirmation that a type 2 PD connection took place to the port, ensuring that the PD device is secure from a power burst. Before this second handshake takes place, the PD and PSE restrict power to within 802.3af limits.
This second handshake takes one of two forms:
- a hardware-based two-event classification
- a software-based LLDP classification
The 802.3at standard mandates that PSEs support only one of these mechanisms. PDs, however, must support both classification methods to ensure the capability to join a variety of networks.
==>> Similar to the Netgear unmanaged PoE, PoE+, and PoE++ switches, there is no information available on the effective negotiation status.
To the Netgear WAX214v2, only 802.3af can be negotiated. But you already know this.
schumaku wrote:
To the Netgear WAX214v2, only 802.3af can be negotiated. But you already know this.
ERRATA
The WAX214v2 does indeed require more than the 802.3af power (different from the WAX214, requesting Class 0), it needs a 802.3at PSE, and it does correctly request Class 4 - and this is visible on the MS108EUP in the PoE Status, too:
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