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Power Over Ethernet (PoE) Operation
Configuring PoE Operation
Changing the Threshold for Generating a Power Notice
By default, PoE support is enabled on the switch’s 10/100Base-TX ports, with
the power priority set to Low and the power threshold set to 80 (%). The
following commands allow you to adjust these settings.
Syntax: power threshold < 1 - 99 >
The power threshold is a configurable percentage of the total
PoE power available on the switch. When PoE consumption
exceeds the threshold, the switch automatically generates an
SNMP trap and also sends a message to the Event Log. For
example, if the power threshold is set to 80% (the default), and
an increasing PoE power demand crosses this threshold, the
switch sends an SNMP trap and generates this Event Log
message:
PoE usage has exceeded threshold of 80 %.
If the switch is configured for debug logging, it also sends the
same message to the configured debug destination(s).
The switch automatically invokes the power threshold at the
global configuration level with a default setting of 80%. You
can configure the power threshold to a value in the range of
1% to 99%.
If an increasing PoE power load (1) exceeds the configured
power threshold (which triggers the log message and SNMP
trap), and then (2) later begins decreasing and drops below
the threshold again, the switch generates another SNMP trap,
plus a message to the Event Log and any configured Debug
destinations. To continue the above example:
PoE usage is below configured threshold
of 80 %.
(Refer to “PoE Event Log Messages” on page 11-21.)
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