Table 5: SRX220 Services Gateway PoE Specifications
(continued)
Values
Power Management Schemes
Ports
0/0
through
0/7
(interfaces ge-0/0/0
through ge-0/0/7).
Supported ports
120 W.
Total PoE power-sourcing capacity
30 W.
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
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.
lists the classes and their power ratings as specified by the IEEE
802.3af standard.
Table 6: PoE Classes and Power Ratings on the SRX220 Services Gateway
Maximum Power Level Output from the PoE Port
Class
15.4 W
0
4.0 W
1
7.0 W
2
15.4 W
3
30.0 W
4
Copyright © 2016, Juniper Networks, Inc.
6
SRX220 Services Gateway Hardware Guide for H Model Numbers
