Network Router User Manual

Table 17: SRX210 Services Gateway PoE Specifications (continued)
ValuesPower Management Schemes
The following ports support PoE:
■
ge-0/0/0
■
ge-0/0/1
■
fe-0/0/2
■
fe-0/0/3
Supported ports
50 wattsTotal PoE power sourcing capacity
30 wattsPer-port power limit
■
Static: power allocated for each interface
can be configured
■
Class: power allocated for interfaces is
decided based on the class of powered
device connected
Power management modes
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
SRX210 Services Gateway Hardware Guide