NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
vickylingtw
Nov 07, 2021Aspirant
Does Netgear have a 8 port PoE extender/passthrough?
I have a GS108Tv2 powered by GS305P. I've only found the 5 port GS105PE. However, I ask because D-Link apparently has an 8 port PoE DGS-1100-8P Rev B that unofficially can be PoE powered through ...
schumaku
Nov 07, 2021Guru - Experienced User
vickylingtw wrote:
I ask because D-Link apparently has an 8 port PoE DGS-1100-8P Rev B that unofficially can be PoE powered through a legacy PD setting when paired with a 24 port DGS-1210-08P upstream.
Reads like a very specific combination of two eight-port switches, whereas the functionality you are vaguely behind might be available on a certain older model and a certain hardware release according to an elderly post on Reddit
" I got my hands on a DLink DGS-1100-08P HW Revision B. This is supposed to be a PoE switch that PROVIDES power but I found that (when connected to a DGS-1210-08P) it shows up as a Legacy PD device and can actually be powered with PoE. .."
Wonder how much power this PSE can make avilable with this legacy mode - very unlikely there is a lot more than the 802.3at can.
"It then powers all its normal PoE ports normally. I got 2 IP cameras and an access point (3 ports) all using the passthrough PoE simultaneously."
Now I would be completely careful on these kind of posts - wild guess the PSE does supply about 30 W, minus some cable overhead makes some 25.5 W ... I would wonder what effective power is available, deducting some 5 W for the switch itself, there are about 20 W available, which is enough to supply _one_ 802.3af requiring 15.4 W. Siad that, _one_ port can be powered.
"I got 2 IP cameras and an access point (3 ports) all using the passthrough PoE simultaneously. I did find that the whole thing browned out if I pulled too much power, but the settings in the 1100-08P allow setting a max wattage which might be useful."
Predictable 8-)
I'd scratch this plan.
vickylingtw
Nov 08, 2021Aspirant
Thanks that's the same place I got the information from.
I really only need 3W. Unfortunately all the ports are wired to a switch inside a box with no outlets, so it's PoE powered.
I really only need 3W. Unfortunately all the ports are wired to a switch inside a box with no outlets, so it's PoE powered.
- schumakuNov 08, 2021Guru - Experienced User
vickylingtw wrote:
I really only need 3W.Well, if these PDs are following the IEEE PoE standards and request Class 1 (which requires the allocation of 4.4W at the PSE per port), being by the classic PoE scheme or by LLDP Power via MDI TLV IEEE 802.3-2015 - permitting the prospec PoE switch can handle it - you might have the chance to drive about four PDs under these conditons.
Related Content
- Sep 11, 2022Retired_Member
NETGEAR Academy

Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!