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Power over Ethernet Support on SRX Series Services Gateway Interfaces


Power over Ethernet (PoE) supports the implementation of the IEEE 802.3 af and IEEE 802.3 at standards, which allow both data and electric power to pass over a copper Ethernet LAN cable.

The SRX550 and SRX650 Services Gateways provide PoE ports, which supply electric power over the same ports that are used for connecting network devices. PoE ports allow you to plug in devices that require both network connectivity and electric power, such as voice over IP (VoIP) and IP phones and wireless access points.

The PoE ports for the SRX550 and SRX650 Services Gateway reside on the individual XPIMs. The services gateway supports the following XPIMs with PoE:

  • 16-Port Gigabit Ethernet XPIM

  • 24-Port Gigabit Ethernet XPIM

The active Services and Routing Engine (SRE) manages the overall system PoE power. You can configure the services gateway to act as power sourcing equipment to supply the power to the GPIMs connected on the designated PoE ports.

Table 1 lists the SRX550 and SRX650 Services Gateway PoE specifications.

Table 1: SRX550 and SRX650 Services Gateway PoE Specifications

Power Management Schemes


Supported standards

  • IEEE 802.3 af

  • IEEE 802.3 at

  • Legacy

Supported slots

PoE is supported on the following front panel slots:

  • SRX550 Services Gateway—Slots 3,4,6,8

  • SRX650 Services Gateway—Slots 2,4,6,8

Total PoE power sourcing capacity

The 645 W AC and 645 W DC power supplies support the following capacities:

  • 255 W with PoE on a single power supply, or with redundancy using the two-power-supply option

  • 510 W with PoE using the two-power-supply option operating as nonredundant

Per-port power limit

31.2 W

Power management modes

  • Static: Power allocation for each interface can be configured.

  • Class: Power for interfaces is allocated based on the class of the powered device connected.