11-20
Power Over Ethernet (PoE) Operation
Configuring PoE Operation
Controlling PoE Allocation
The default option for PoE allocation is
usage
, which is what a PD attached
to the port is allocated (default is 17W). You can override this value by
specifying the amount of power allocated to a port by using the
class
or
value
options.
Figure 11-2. Possible PD Class Detected with Ranges
For example, to allocate by class for ports A6 -A8:
ProCurve(config)# int A6-A8 poe-allocate-by class
Manually Configuring PoE Power Levels
You can specify a power level (in watts) allocated for a port, ranging from 1
to 17 watts in 1 watt increments, by using the
value
option.
To configure a port by value, first set the PoE allocation by entering the
poe-
allocate-by value
command:
ProCurve(config)# int A6 poe-allocate-by value
or in interface context:
ProCurve(eth-A6)# poe-allocate-by value
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 figure 11-2.
value:
A user-defined level of PoE power allocated for that port.
Class Usage Power Range (W) Maximum Allowed with extra 15%
0 Default 0.44 to 12.95 12.95 * 1.15 = 14892 mW
1 Optional 0.44 to 3.84 3.84 * 1.15 = 4416 mW
2 Optional 3.84 to 6.49 6.49 * 1.15 = 7463 mW
3 Optional 6.49 to 12.95 12.95 * 1.15 = 14892 mW
4 Reserved
* Due to ramp-up requirements, an extra 15% is added in power allocation by
class.
3500-5400-6200-8200-MCG-Jan08-K_13_01.book Page 20 Monday, January 28, 2008 10:04 AM