Juniper Networks SRX 210 - Manual (Page 46)

Table 14: SRX210 Services Gateway PoE Specifications (continued)
Values Power 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 watts Total PoE power sourcing capacity
30 watts Per-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 58 .
NOTE:
• The PoE+ functionality is available from Junos OS 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 15 on page 30 lists the classes and their power ratings as specified by the IEEE
802.3 AF standard.
Table 15: PoE Classes and Power Ratings on the SRX210 Services Gateway
Maximum Power Level Output from the PoE
Port
Class
15.4 watts 0
Copyright © 2013, Juniper Networks, Inc. 30
SRX210 Services Gateway Hardware Guide