Management and Configuration Guide K/KA/KB.15.15

Table 8 PoE priority operation on a PoE module (continued)
Configuration command and resulting operation with PDs connected to ports C3 through
C24
Priority settingPort
low- priority ports, power is allocated to the ports in ascending order, beginning with
the lowest-numbered port in the class (port 22, in this case), until all available power
is in use.
In this example, the CLI command disables PoE power on ports C1 to C2:N/AC1 - C2
(HP_Switch_name#) no interface c1-c2 power-over-ethernet
There is no priority setting for the ports in this example.
1
In the default PoE configuration, the ports are already set to low priority. In this case, the command is not necessary.
About configuring thresholds for generating a power notice
You can configure one of the following thresholds:
A global power threshold that applies
to all modules on the switch.
This setting acts as a trigger for sending a notice when the
PoE power consumption on any PoE module installed in the
switch crosses the configured global threshold level.
(Crossing the threshold level in either direction—PoE power
usage either increasing or decreasing—triggers the notice.)
The default setting is 80%.
A per-slot power threshold that
applies to an individual PoE module
installed in the designated slot.
This setting acts as a trigger for sending a notice when the
module in the specified slot exceeds or goes below a specific
level of PoE power consumption.
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.
(HP_Switch_name#) power-over-ethernet 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 destinations.
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.
Example
To continue the preceding example, if the PoE power usage on the PoE module in slot B drops
below 70%, another SNMP trap is generated and you will see this message in the Event Log:
Slot B POE usage is below threshold of 70%.
By using the [slot slot-id-range] option, you can specify different notification thresholds
for different PoE modules installed in the switch. For example, you could set the power threshold
for a PoE module in slot "A" to 75% and the threshold for the module in slot "B" to 68% by executing
the following two commands:
(HP_Switch_name#) power-over-ethernet slot a
About configuring thresholds for generating a power notice 127