PoE/PoE+ Planning and Implementation Guide 2011-09

2-16
Operating Rules
Provisioning Power for PoE
PoE Power Requirements
The Switch 2910al-24G-PoE+ has 24 ports with an internal PoE power supply
that provides 382 watts of power across all 24 ports. The Switch 2910al-48G-
PoE+ has 48 ports with 382 watts of power across all 48 ports. The HP
ProCurve 630 RPS/EPS can provide an extra 388 watts for a total of 770 watts.
PoE/PoE+ Allocation Using LLDP Information
A PoE port can automatically configure certain PoE+ link partner devices if
the device supports advertising of its PoE needs.
By enabling PoE LLDP detection, available information about the power
requirements of the PD may be used by the switch to configure the power
allocation. The initial configuration for PoE ports may change if more accurate
configuration information is provided by way of LLDP.
For more information, see the Management and Configuration Guide for
your switch at www.hp.com/networking/support.
HP ProCurve 2915-8G-PoE Switch
Maximum PoE Power
The Switch 2915-8G-PoE provisions 8 ports with its PoE power supply of 67
watts for PoE applications compatible with the IEEE 802.3af standard and
some pre-standard PoE devices.
Note There is no external power supply available for these switches.
Table 2-8. Maximum Power Allocations
PoE Power Requirements
It is important to understand the PoE power requirements of this switch
because if the PoE power is not planned and implemented correctly, end
devices connected to the PoE switch ports may not receive power if a switch
PoE power source failure occurs or if the switch is over provisioned.
PoE Devices Internal Only
PoE for Switch
2915-8G-PoE
67 watts available to
ports 1-8.