NETGEAR GS108LP

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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 https://kb.netgear.com/209/What-is-PoE-Power-over-Ethernet

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

Class

Standard

Range of Power

Delivered to the

Powered Device

Minimum Output at PoE

Switch Port (Minimum

Allocated)

Maximum Output at PoE

Switch Port (Maximum

Allocated)

PoE/PoE+

0.44W-12.95W

15.4W

16.2W

PoE/PoE+

0.44W-3.84W

4.0W

4.2W

PoE/PoE+

3.84W-6.49W

7.0W

7.4W

PoE/PoE+

6.49W-12.95W

15.4W

16.2W

PoE+

12.95W-25.5W

30.0W

31.6W

If for example, you have 10 PDs that are class 2, the total budget required is 70W.

Other manuals for NETGEAR GS108LP

Installation Guide2 pages

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NETGEAR GS108LP Specifications

General

Switch type	Unmanaged
Quality of Service (QoS) support	Yes
Power connector	AC-in jack
Gigabit Ethernet (copper) ports quantity	8
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	-
Form factor	1U
Product color	Black, Grey
Number of fans	0 fan(s)
Total Power over Ethernet (PoE) budget	60 W
Power source	DC/PoE
Input current	1.25 A
DC input voltage	54 V
Power consumption (max)	130 W
Power consumption (typical)	67.5 W
MAC address table	4000 entries
Mean time between failures (MTBF)	2752476 h
10G support	No
Networking standards	IEEE 802.1p, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3at, IEEE 802.3az, IEEE 802.3i, IEEE 802.3u, IEEE 802.3x
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Heat dissipation	230.85 BTU/h
Operating altitude	0 - 1000 m
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	0 - 95 %
Operating relative humidity (H-H)	0 - 90 %
Harmonized System (HS) code	85176990