Configuring Poe Properties - Cisco 500 series Administration Manual

Managing Power-over-Ethernet Devices

Configuring PoE Properties

Configuring PoE Properties
STEP 1
STEP 2
Cisco 500 Series Stackable Managed Switch Administration Guide
may not be able to properly supply power to its attaching PDs.
To prevent false detection, you should disable PoE on the ports on the PoE switches
that are used to connect to PSEs. You should also first power up a PSE device
before connecting it to a PoE switch. When a device is being falsely detected as a
PD, you should disconnect the device from the PoE port and power recycle the
device with AC power before reconnecting its PoE ports.
PoE Properties
The page enables selecting either the Port Limit or Class Limit PoE
mode and specifying the PoE traps to be generated.
These settings are entered in advance. When the PD actually connects and is
consuming power, it might consume much less than the maximum power allowed.
Output power is disabled during power-on reboot, initialization, and system
configuration to ensure that PDs are not damaged.
To configure PoE on the switch and monitor current power usage:
Click Port Management > PoE > Properties. The
Enter the values for the following fields:
• Power Mode—Select one of the following options:
Port Limit
- —The maximum power limit per each port is configured by the
user.
Class Limit
-
class of the device, which results from the Classification stage.
• Traps—Enable or disable traps. If traps are enabled, you must also enable
SNMP and configure at least one SNMP Notification Recipient.
• Power Trap Threshold—Enter the usage threshold that is a percentage of
the power limit. An alarm is initiated if the power exceeds this value.
The following counters are displayed for each device or for all the units of the
stack:
• Nominal Power—The total amount of power the switch can supply to all the
connected PDs.
—The maximum power limit per port is determined by the
PoE Properties
page opens.
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