From mboxrd@z Thu Jan 1 00:00:00 1970
From: barrywasdell@gmail.com
To: 9fans <9fans@9fans.net>
Subject: PoE Support for Plan9 on RPI 4B/3B+?
Message-Id: <15849909490.7E5BEBB6.71072@composer.9fans.topicbox.com>
Date: Mon, 23 Mar 2020 15:15:49 -0400
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Date: Mon, 23 Mar 2020 15:15:49 -0400
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I have four Raspberry Pi model 4B boards and a Raspberry Pi model 3B+
board and would like to know whether or not Power over Ethernet (PoE) is
supported by the Pi9 port.
Has anyone attempted to power a Plan9 cluster/grid over PoE? What PoE
network switches would you recommend? Were there any issues? Richard
Miller?
To be clear, a PoE network enables boards to be powered over an Ethernet
network if a side-board (HAT) is connected. [1] A PoE network switch
conforming to IEEE 802.3af delivers power through the each Pi's RJ45
network connector over Cat 5 cabling. [2]
To my knowledge, neither the 9front kernel sources nor the documented
list of supported hardware, specifically mentions PoE. [3] It seems the
network switch and HAT negotiate power delivery independently of the
kernel so I cannot think of a reason why Plan9 would not support
powering this way.
References
[1]: https://www.raspberrypi.org/blog/introducing-power-over-ethernet-poe-h=
at/
[2]: https://ieeexplore.ieee.org/document/1213877
[3]: https://9p.io/wiki/plan9/Supported_PC_hardware/index.html
--
Barry Wasdell (bwasd)=
--15849909491.6b2d.71072
Date: Mon, 23 Mar 2020 15:15:49 -0400
MIME-Version: 1.0
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I have four Raspberry Pi model 4B boards an=
d a Raspberry Pi model 3B+
board and would like to know wheth=
er or not Power over Ethernet (PoE) is
supported by the Pi9 p=
ort.
Has anyone attempted to power a Plan9 clu=
ster/grid over PoE? What PoE
network switches would you recom=
mend? Were there any issues? Richard
Miller?
To be clear, a PoE network enables boards to be powered over a=
n Ethernet
network if a side-board (HAT) is connected. [1] A =
PoE network switch
conforming to IEEE 802.3af delivers power =
through the each Pi's RJ45
network connector over Cat 5 cabli=
ng. [2]
To my knowledge, neither the 9front ke=
rnel sources nor the documented
list of supported hardware, s=
pecifically mentions PoE. [3] It seems the
network switch and=
HAT negotiate power delivery independently of the
kernel so =
I cannot think of a reason why Plan9 would not support
poweri=
ng this way.
References
--
Barry Wasdell (bwasd)
=
--15849909491.6b2d.71072--