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

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Planning and Implementation for the HP 5400R zl2 Switches
Configuration Examples
The following table shows label and description for HP 5412R zl2 with three
power supplies, two J9828A and one J9829A:
Redundancy now becomes an issue. You can use the one J9829A (900 watts)
to backup the two J9828As if either one of them fails, but you cannot use the
two J9828As to backup the J9829A as they don’t have enough PoE power.
The J9829A is only be able to power 6 module slots should both of the J9828As
fail. You may not be able to supply all ports with PoE power depending on
which modules and which ports are configured to supply PoE power.
This configuration (Figure 14-15) is an example of using three power
supplies—one J9828A supplying 275 watts and two J9829As supplying 1664
watts—supplying a maximum of 1918 watts. A total of 124 ports can be
powered at 15.4 watts each.
Label Description
1 Front
2 832 watts for PoE per
power supply
3 254 watts for PoE per
power supply
4 Back
Source of Power
(PoE/PoE+)
Watts Available Number of Ports Powered and
Average watts/Port
Redundant Number of Ports Powered
and Average watts/Port
Three Internal PoE
Power Supplies: two
J9828As one J9829A
1340 (without
redundancy)
44 @average 30 W each
86 @ average 15.4 W each
177 @ average 7.5 W each
288 @ average 4.0 W each
None