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Power Over Ethernet (PoE) Operation
Viewing PoE Configuration and Status
Viewing PoE Configuration and Status
Displaying the Switch’s Global PoE Power Status
Syntax: show power-over-ethernet
Displays the switch’s global PoE power status, including:
• Pre-standard Detect: Shows whether PoE for
pre-802.3af-standard powered devices is enabled on
the switch. (Default: Off; shows On when PoE for
pre-802.3af-standard powered devices has been
enabled.)
• Operational Status: Indicates whether PoE power is avail-
able on the switch. (Default: On; shows Off if PoE power
is not available. Shows Faulty if internal or external PoE
power is oversubscribed or faulty.)
• Usage Threshold (%): Lists the configured percentage of
available PoE power provisioning the switch must
exceed to generate a usage notice in the form of an Event
Log message and an SNMP trap. If this event is followed
by a drop in power provisioning below the threshold, the
switch generates another SNMP trap and Event Log
message. Event Log messages are also sent to any
optionally configured debug destinations. (Default: 80%)
• Total Available Power: Lists the maximum PoE wattage
available to provision active PoE ports on the switch.
This is the amount of usable power for PDs.
• Total used Power: The power used by the PDs.
• Total Remaining Power: Lists the amount of PoE power
still available.
For example, in the default PoE configuration, when the switch is running
with several ports supporting PD loads, show power-over-ethernet displays data
similar to the following:
11-16