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

12-4
Planning and Implementation for the HP 3800-PoE+ Switches
PoE Provisioning
Table 12-1. PoE Power Provisioning for the 3800-PoE+ Switches
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.
Note By default, LLDP on each switch is enabled. PoE+ (802.3at) Powered Devices
(PD) that only support 2-event class signature may not be able to negotiate
for additional power when connected to the switch. In such cases, the LLDP
option on the switch port must be disabled to enable the 2-event classification
so that such PoE+ PDs may be detected.
For information on CLI commands to disable LLDP, see the Management and
Configuration Guide for your switch at www.hp.com/networking/support. Auto
search on “3800”, select your switch model from the list, and click Display
selected. Then click on the links that have “Manuals” in them to get to the web
page that lists the available manuals.
PoE Devices One power supply Two power supplies
PoE for the
3800-24G-PoE+-2SFP+
and
3800-24G-PoE+-2XG
Switches
When connected to 110 volts, 573 watts
available to ports 1-24 with 127 watts being
used by the system.
When connected to 220 volts there is 873
watts available for PoE+.
When connected to 110 volts, 1080 watts
available to ports 1-24 with 127 watts being used
from the first power supply by the system.
When connected to 220 volts, 1080 watts
available to ports 1-24 for PoE+.
PoE for the
3800-48G-PoE+-4SFP+
and
3800-48G-PoE+-4XG
Switches
When connected to 110 volts, 573 watts
available to ports 1-48 with 127 watts being
used by the system.
When connected to 220 volts, 815 watts
available to ports 1-48 with 185W being used
by the system.
When connected to 110 volts, 1080 watts
available to ports 1-48 with 127 watts being used
from the first power supply by the system.
When connected to 220 volts, 1080 watts
available to ports 1-48 with 185 watts being used
by the system.