Power over Ethernet Fundamentals

Table 1. Power over Ethernet product support

Feature

Product

Release introduced

Power over Ethernet (PoE)

5320 Series

Fabric Engine 8.6

Not supported on 5320-24T-8XE or 5320-48T-8XE

5420 Series

VOSS 8.4

Not supported on:

  • 5420F-24T-4XE

  • 5420F-48T-4XE

  • 5420F-24S-4XE

  • 5420M-24T-4YE

  • 5420M-48T-4YE

5520 Series

VOSS 8.2.5

Supported on:

  • 5520-12MW-36W

  • 5520-24W

  • 5520-48W

5720 Series

Fabric Engine 8.7

Not supported on 5720-VIM-2CE or 5720-VIM-6YE

7520 Series

Not Applicable

7720 Series

Not Applicable

VSP 4900 Series

VOSS 8.1

Supported on all fixed ports on VSP4900-48P and ports 1/1-1/12 on VSP4900-12MXU-12XE

VSP 7400 Series

Not Applicable

PoE/PoE+ allocation using LLDP

5320 Series

Fabric Engine 8.6

Not supported on 5320-24T-8XE or 5320-48T-8XE

5420 Series

VOSS 8.4

Not supported on:

  • 5420F-24T-4XE

  • 5420F-48T-4XE

  • 5420F-24S-4XE

  • 5420M-24T-4YE

  • 5420M-48T-4YE

5520 Series

VOSS 8.2.5

Supported on:

  • 5520-12MW-36W

  • 5520-24W

  • 5520-48W

5720 Series

Fabric Engine 8.7

Not supported on 5720-VIM-2CE or 5720-VIM-6YE

7520 Series

Not Applicable

7720 Series

Not Applicable

VSP 4900 Series

VOSS 8.1

Supported on all fixed ports on VSP4900-48P and ports 1/1-1/12 on VSP4900-12MXU-12XE

VSP 7400 Series

Not Applicable

Fast PoE

5320 Series

Fabric Engine 8.6

Not supported on 5320-24T-8XE or 5320-48T-8XE

5420 Series

VOSS 8.4

Not supported on:

  • 5420F-24T-4XE

  • 5420F-48T-4XE

  • 5420F-24S-4XE

  • 5420M-24T-4YE

  • 5420M-48T-4YE

5520 Series

VOSS 8.2.5

Supported on:

  • 5520-12MW-36W

  • 5520-24W

  • 5520-48W

5720 Series

Fabric Engine 8.7

Not supported on 5720-VIM-2CE or 5720-VIM-6YE

7520 Series

Not Applicable

7720 Series

Not Applicable

VSP 4900 Series

VOSS 8.1

Supported on all fixed ports on VSP4900-48P and ports 1/1-1/12 on VSP4900-12MXU-12XE

VSP 7400 Series

Not Applicable

Perpetual PoE

5320 Series

Fabric Engine 8.6

Not supported on 5320-24T-8XE or 5320-48T-8XE

5420 Series

VOSS 8.4

Not supported on:

  • 5420F-24T-4XE

  • 5420F-48T-4XE

  • 5420F-24S-4XE

  • 5420M-24T-4YE

  • 5420M-48T-4YE

5520 Series

VOSS 8.2.5

Supported on:

  • 5520-12MW-36W

  • 5520-24W

  • 5520-48W

5720 Series

Fabric Engine 8.7

Not supported on 5720-VIM-2CE or 5720-VIM-6YE

7520 Series

Not Applicable

7720 Series

Not Applicable

VSP 4900 Series

VOSS 8.1

Supported on all fixed ports on VSP4900-48P and ports 1/1-1/12 on VSP4900-12MXU-12XE

VSP 7400 Series

Not Applicable

Power over Ethernet (PoE) is the implementation of IEEE 802.3af, IEEE 802.3at, and IEEE 802.3bt (Type 3 and Type 4), which allows for both data and power to pass over a copper Ethernet LAN cable. Typical power devices include wireless Access Points and VoIP telephones.

Depending on the technology and application requirements, PoE is classified into classes. Depending on the power requirements, the PoE devices are categorized by type. Classes range from Class 0 to 8 whereas types range from Type 1 to 4. Each type associates with an IEEE 802.3 PoE standard. These standards provide signaling between the power sourcing equipment (PSE) and the powered device (PD). PSE devices, such as switches, provide power on the network cable. The devices that PSE provides power to are called PDs, such as VoIP phones, wireless access points, and IP surveillance cameras.

To know which ports support PoE, see the following documents:

The switch uses the Dynamic Power Allocation scheme when supplying power to devices. Only the power being consumed by the device is allocated, improving efficiency and enabling support for more number of devices.

You can configure PoE from CLI and Enterprise Device Manager (EDM).