HP J8697A Planning And Implementation Guide

3-6
Planning and Implementation for the Series 3500yl Switches
Planning Your PoE Configuration
Planning and
Implementation for the
Series 3500yl Switches
The table in this example configuration contains entries that show the PoE
power available for the 3500yl-48G-PWR.
Figure 3-4. Example of two 3500yl-48G-PWR Switches connecting to a ProCurve
620 External and Redundant Power Supply (J8696A)
Each of the two switches can receive full redundant power from the 620 RPS/
EPS should one of the switches internal power supplies fail. The lowest loaded
bank of ports (1-24 or 25-48) has 22 watts reserved. That power is available
for use by the two highest priority ports in the bank, (in a default configuration
ports 1 and 2, or 25 and 26).
3500yl 48 port
switches
620 RPS/EPS
Source of
Power
Watts
Available
# of Ports Powered and
Average Watts/Port
Redundant # of Ports
Powered and Average
Watts/Port
Internal PoE
Power Supply
398 25 @ average 15.4 W each
48 @ average 7.0 W each
48 @ average 4.0 W each
None
Internal plus
External PoE
power Supply
398 + 388 48 @ average 15.4 W each 24 @ average 15.4 W each
48 @ average 7.0 W each
External PoE
Power Supply
(failed Internal
Power Supply)
388
(22 W is
reserved for
either ports
1-24 or 25-48)
25 @ average 15.4 W each
48 @ average 7.0 W each
48 @ average 4.0 W each

HP J8697A Specifications

General

Ports	24
Form Factor	Rack-mountable
Power Supply	Internal
Management	Managed
VLAN Support	Yes
Jumbo Frame Support	Yes
Switching Capacity	48 Gbps
Forwarding Rate	35.7 Mpps
Model	HP J8697A
Port Type	10/100/1000BASE-T
Layer	Layer 2