Power Over Ethernet (PoE) Operation
Configuring PoE Operation
Changing the Threshold for Generating a Power Notice
Syntax: power [slot < slot-identifier >] threshold < 1 - 99 >
This command specifies the PoE usage level (as a percentage of the
PoE power available on a module) at which the switch generates a
power usage notice. This notice appears as an SNMP trap and a
corresponding Event Log message, and occurs when a PoE module’s
power consumption crosses the configured threshold value. That is,
the switch generates a notice whenever the power consumption on
a module either exceeds or drops below the specified percentage of
the total PoE power available on the module.
This command configures the notification threshold for PoE power
usage on either a global or per-module (slot) basis.
Without the [slot < slot-identifier >] option, the switch applies one
power threshold setting on all PoE modules installed in the switch.
For example, suppose slots A, B, and C each have a PoE module
installed. In this case, executing the following command sets the
global notification threshold to 70% of available PoE power.
ProCurve(config)# power threshold 70
With this setting, if module B is allocated 100 watts of PoE power
and is using 68 watts, and then another PD is connected to the
module in slot B that uses 8 watts, the 70% threshold of 70 watts is
exceeded. The switch sends an SNMP trap and generates this Event
Log message:
Slot B POE usage has exceeded threshold of 70 %.
If the switch is configured for debug logging, it also sends the Event
Log message to the configured debug destination(s).
On any PoE module, if an increasing PoE power load (1) exceeds
the configured power threshold (which triggers the log message and
SNMP trap), and then (2) later decreases and drops below the
threshold again, the switch generates another SNMP trap, plus a
message to the Event Log and any configured Debug destinations.
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