Juniper Networks SRX 210 manual PoE Classes and Power Ratings

SRX210 Services Gateway Hardware Guide

Table 17: SRX210 Services Gateway PoE Specifications (continued)

Power Management Schemes	Values
Supported ports	The following ports support PoE:
	■	ge-0/0/0
	■	ge-0/0/1
	■	fe-0/0/2
	■	fe-0/0/3
Total PoE power sourcing capacity	50 watts
Per-port power limit	30 watts
Power management modes	■ Static: power allocated for each interface
		can be configured

■ Class: power allocated for interfaces is decided based on the class of powered device connected

The IEEE 802.3 AF (PoE) functionality is supported on SRX210 Services Gateway PoE models that have power supply of 48V. The IEEE802.3 AT (PoE+) functionality is supported on SRX210 Services Gateway PoE models that have power supply of 54V. For more information, see “Adjusting the Power Supply Adapter Tray for the SRX210 Services Gateway for Rack-Mount Installation” on page 70.

NOTE:

■The PoE+ functionality is available from JUNOS Software Release 10.2 or later.

■The PoE+ functionality is available only if your gateway is using 54V power supply. You can order the 54V power supply from Juniper Networks. Contact your Juniper Networks customer service representative for more information.

PoE Classes and Power Ratings

A powered device is classified based on the maximum power that it draws across all input voltages and operational modes. When the class-based power management mode is configured on the services gateway, power is allocated by taking into account the maximum power ratings defined for the different classes of devices.

Table 18 on page 37 lists the classes and their power ratings as specified by the IEEE 802.3 AF standard.

36■ SRX210 Services Gateway PoE Overview