HP Power over Ethernet (PoE/PoE+) Planning and Implementation Guide

9-7
Planning and Implementation for the HP 2920-PoE+ Switches
Planning the PoE Configuration
HP 2920-48G-PoE+ Configurations
Figure 9-2. Example of an HP 2920-48G-PoE+ Switch
Note: PoE or PoE+ is not supplied to any of the SFP ports.
1
Any 12 of the 48 ports can be used, not just the first block of ports.
2
Any 23 of the 48 ports can be used.
3
Any 47 of the 48 ports can be used.
Note: Additional PoE+ can be provided by connecting either 2920 Switch to
an HP 640 RPS/EPS Shelf with a PoE+ power supply installed. For more
information, see the HP 640 Installation and Power Setup Guide on the web
site www.hp.com/networking/support. Auto search on “640”, select the HP 640
from the list, click Display selected, then click on the links that include the
word “manuals” in them to get to the manuals web page.
Any 12 of the ports
can receive up to
30 Watts of PoE+
power
1
HP 2920-48G-PoE+ Switch
575W PSU: Any 23 of the ports can receive up to
15.4 Watts of PoE+ power.
2
1050W PSU: Any 23 of the ports can receive up to
30 Watts of PoE+ power. See the table below.
2
575W PSU: Any 47 of the ports can receive up to
7.5 Watts of PoE+ power.
3
1050W PSU: All 48 ports can receive up to
15.4 Watts of PoE+ power. See the table below.
Source of Power Watts
Available
Number of Ports Powered
and Average Watts/Port
Internal 575W PoE+
Power Supply
370 12 @ average 30 W each
1
23 @ average 15.4 W each
2
48 @ average 7.5 W each
3
Internal 1050W PoE+
Power Supply
740 23 @ average 30 W each
2
48 @ average 15.4 W each
48 @ average 7.5 W each