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FAQs:
How do I troubleshoot problems with my NETGEAR PoE switch?
This article assists in troubleshooting common Power over Ethernet (PoE) problems with NETGEAR PoE
switches.
Power over Ethernet (PoE) is a networking feature defined by the IEEE 802.3af and IEEE 802.3at
standards. PoE lets Ethernet cables supply power to network devices over the existing data connection.
PoE-capable devices can be power-sourcing equipment (PSE), powered devices (PDs), or sometimes
both. The device that transmits power is a PSE, while the device that is powered is a PD. Here, the PSE is
a PoE switch. The PDs may be devices such as VoIP phones, wireless access points, and IP cameras.
For further information on PoE, refer to
Follow the guidelines in this article to help resolve problems such as:
PD is not powering on.
PD is powering off intermittently.
Certain PDs are powering on while other PDs on the same PoE switch remain powered off.
PoE Standards
As mentioned above, PoE is defined by IEEE 802.3af (known as PoE) and 802.3at (known as PoE+)
standards. If your PoE switch supports IEEE 802.3at, it can supply power to both 802.3at and 802.3af
PDs. However, if your switch supports 802.3af only, it can only supply power to 802.3af (PoE) PDs.
PoE Budget
Your PoE switch has a PoE budget, that is, the total amount of power measured in watts that it can
supply to PDs at one time. Refer to the datasheet of your switch to verify its PoE budget. You should
ensure that the amount of power being drawn by your connected PDs does not exceed the PoE budget
of your switch. When calculating the amount of power being drawn by your PDs, you need to check the
PoE class to which the PD belongs. The PoE class of a PD determines the amount of power it will require,
as seen in the below table:
Device
Standard
Class
0
PoE/PoE+ 0.44W-12.95W
1
PoE/PoE+ 0.44W-3.84W
2
PoE/PoE+ 3.84W-6.49W
3
PoE/PoE+ 6.49W-12.95W
4
PoE+
If for example, you have 10 PDs that are class 2, the total budget required is 70W.
https://kb.netgear.com/209/What-is-PoE-Power-over-Ethernet
Range of Power
Delivered to the
Powered Device
12.95W-25.5W
Minimum Output at PoE
Switch Port (Minimum
Allocated)
15.4W
4.0W
7.0W
15.4W
30.0W
Maximum Output at PoE
Switch Port (Maximum
Allocated)
16.2W
4.2W
7.4W
16.2W
31.6W
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Related Manuals for NETGEAR GS108LP
Summary of Contents for NETGEAR GS108LP
- Page 1 FAQs: How do I troubleshoot problems with my NETGEAR PoE switch? This article assists in troubleshooting common Power over Ethernet (PoE) problems with NETGEAR PoE switches. Power over Ethernet (PoE) is a networking feature defined by the IEEE 802.3af and IEEE 802.3at standards.
- Page 2 If you see symptoms where you cannot power more than one PD in a set of adjacent ports, such as scenarios outlined below, please contact NETGEAR Support. When contacting Support, it may be beneficial to reference the troubleshooting you have already carried out as described in this article.
- Page 3 Knowledge Base. How can I troubleshoot LAN connectivity problems on my NETGEAR ProSAFE or Nighthawk Switch? LAN connectivity problems on a switch can be caused by any of a wide range of factors. Below are some simple things to check which can help to resolve common problems.
- Page 4 How does the flexible Power over Ethernet (PoE) budget work on my NETGEAR GS108LP, GS108PP, GS116LP, or GS116PP switch? Your NETGEAR GS108LP, GS108PP, GS116LP, or GS116PP Gigabit Unmanaged Ethernet Switch comes with a single external power adapter. All four models have a built-in power over ethernet (PoE) power selector switch that allows you to connect a different power adapter (sold separately) that can be used to increase or decrease the PoE power available on the switch.
- Page 5 Any device that is located outdoors and connected to this product must be properly grounded and surge protected. To the extent permissible by applicable law, failure to follow these guidelines could result in damage to your NETGEAR product, which might not be covered by NETGEAR’s warranty. Observe and follow service markings: Do not service any product except as explained in your system documentation.
- Page 6 Keep your system away from radiators and heat sources. Also, do not block cooling vents. Do not spill food or liquids on your system components, and never operate the product in a wet environment. If the system gets wet, see the appropriate section in your troubleshooting guide, or contact your trained service provider.
- Page 7 Position system cables and power cables carefully. Route cables so that they cannot be stepped on or tripped over. Be sure that nothing rests on any cables. Do not modify power cables or plugs. Consult a licensed electrician or your power company for site modifications.