PoE/PoE+ Planning and Implementation Guide 2011-09

2-4
Operating Rules
Configuring PoE/PoE+ Power Using the CLI
Configuring PoE/PoE+ Power Using the
CLI
Allocating PoE Power by Class or User-defined Power
Level
The 2910al, 3500, 3500yl, E3800 and the E5400zl/E8200zl switches provide
maximum flexibility by allowing the switch to detect and display 802.3af or
802.3at device class, but does not enforce the power level specified in each
device class. In addition to this, the switch can allocate PoE/PoE+ power
according to the power level specified in each device class or a level defined
by the customer.
There are three methods to allocate PoE/PoE+ power:
■ By device usage (default). The switch does not enforce the power limit.
■ By power level specified in 802.3af or 802.3at. The device class will be
detected according to the specification and power limits will be enforced.
■ By user-defined. Configurable per port values or a range of ports to power
level 1-17 watts or 1-33 watts for the 2910al and 3500yl-PoE+ Switches.
Incorrectly setting the PoE/PoE+ maximum value to be less than the
device requires will result in a PoE/PoE+ fault.
For more information, see the Management and Configuration Guide for
your switch at:
www.hp.com/networking/support
Switch Port Priority
Using a port-number priority method, a lower-numbered port has priority
over a higher-numbered port within the same configured priority class, for
example, port A1 has priority over port A5 if both are configured with High
priority.
A port can be assigned a power priority that alters the assignment of power
to it by the switch. For more information, see the Management and
Configuration Guide for your switch at:
www.hp.com/networking/support