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Power Over Ethernet (PoE) Operation
Configuring PoE Operation
Priority
Setting
Configuration Command and Resulting Operation
Low This priority class receives power only if all PDs on ports with High and Critical priority settings are
receiving power. If there is enough power to provision PDs on only some Low priority ports, then power is
allocated to the ports in ascending order, beginning with the lowest-numbered port in the class until all
available power is in use. For this example, the CLI command to set ports to “Low” is:
ProCurve(config)# interface 8-14 power low
- n/a - For this example, PoE is disabled on these ports. The CLI command for this setting is:
ProCurve(config)# no interface 15-23 power
Controlling PoE Allocation
The default option for PoE allocation is usage, which is what a PD attached
to the port is allocated. You can override this value by specifying the amount
of power allocated to a port by using the class or value options.
Syntax: [no] int <port-list> poe-allocate-by [usage | class | value]
Allows you to manually allocate the amount of PoE power for
a port by either its class or a defined value.
usage: The automatic allocation by a PD
class: Uses the power ramp-up signature of the PD to identify
which power class the device will be in. Classes and their
ranges are shown in table 11-1.
value: A user-defined level of PoE power allocated for that port.
Note The allowable PD requirements are lower than those specified for PSEs to
allow for power losses along the Cat-5 cable.
11-10