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Forum Discussion
PoE 802.3af Standards A or B
Does the M4300-28G-PoE+ support PoE 802.3af with variant A or B, or maybe both?
A or B refers to https://en.wikipedia.org/wiki/Power_over_Ethernet#Pinouts
I have PoE device which in particular re...
As we talk of PoE for Gigabit Ethernet where all four pairs are used for data ... the power is provided "in-band" anyway and the subject question obsolete.
I have 2 UAP-AC-M-PRO connected to a M4300-28G-PoE+, yes this is the bigger model that only supports 802.3af but I can say that this particular model does work as expected.
Other than that I agree with schumaku concerning the sensing that happens with PoE. It gets even more complex with PoE+... ;)
Just wanna report, that Ubiquiti UniFi Mesh UAP-AC-M works with M4300-28G-PoE+.
After testing a few M4300-28G-PoE+ with a dozen UAP-AC-M, I was experienced weird behavior, as described in this article: https://kb.netgear.com/000060427/How-do-I-troubleshoot-problems-with-my-NETGEAR-PoE-switch, near the end:
---------- quote --------
"On a switch with greater than 16 ports, a PD on Port 1 powers on but a PD on ports 2, 3 & 4 does not power on. Similarly, a PD on port 5 powers on but a PD on ports 6, 7 & 8 does not power on."
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After switch reboot, all devices works O.K., but if I unplug device and plug it back, it is not powered. Only one from fourth devices is powered, and if I unplug that one, another one (just one) starts being powered and works.
Only workaround I can find is to connect device with patchcord with only pins 1,2,3,6 connected. Device is then instantly recognized and powered. You can also set port to 100Mbit full-duplex, with no auto negotiation, so device gets connected much quicker.
As article suggests i contacted support, but with no success so far...
Hi schumaku
What is odd is not the switch here. The switch is fully compliant with 802.3af and 802.3at standards (hardware handshake and/or software handshake). One could blame proprietary third-party PD devices that are far from the standard, here?
We will need tech-support file out of the switch when the problem occurs with standard patch cables in first place, I believe, to understand when the access point is deviating from the standard.
Regards,
Ohhhhhhh OK that's not what I wanted to say, sorry for this misunderstanding.
As I said before, I am aware of all consequences from incompatibility of my devices, and prepared for all sort of problems.
Just found the mentioned article, and hoped, that if similar problem is already known, some solution also exists. I like to know that solution, even if problem mentioned in article is caused by standard-compliant devices, and some other switch.
I'll be happy to provide support file to my support ticked, if somebody ask.
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