Power Inline Consumption - Cisco Catalyst 3560-X Command Reference Manual

power inline consumption

power inline consumption
Note
Syntax Description
Defaults
Command Modes
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Usage Guidelines
Catalyst 3750-X and 3560-X Switch Command Reference
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To override the amount of power specified by the IEEE classification for a powered device, use the
power inline consumption global or interface configuration command to specify the wattage used by
each device. To return to the default power setting, use the no form of this command.
power inline consumption default wattage
no power inline consumption default
The default keyword appears only in the global configuration command.
wattage
The default power on each Power over Ethernet (PoE) port is15400 mW.
Global configuration
Interface configuration
Release Modification
12.2(53)SE2 This command was introduced.
When Cisco powered devices are connected to PoE ports, the switch uses Cisco Discovery Protocol
(CDP) to determine the CDP-specific power consumption of the devices, which is the amount of power
to allocate based on the CDP messages. The switch adjusts the power budget accordingly. This does not
apply to IEEE third-party powered devices. For these devices, when the switch grants a power request,
the switch adjusts the power budget according to the powered-device IEEE classification. If the powered
device is a class 0 (class status unknown) or a class 3, the switch budgets 15400 mW for the device,
regardless of the CDP-specific amount of power needed.
If the powered device reports a higher class than its CDP-specific consumption or does not support
power classification (defaults to class 0), the switch can power fewer devices because it uses the IEEE
class information to track the global power budget.
With PoE+, powered devices use IEEE 802.3at and LLDP power with media dependent interface (MDI)
type, length, and value descriptions (TLVs), Power-via-MDA TLVs, for negotiating power up to 30 W.
Cisco pre-standard devices and Cisco IEEE powered devices can use CDP or the IEEE 802.3at
power-via-MDI power negotiation mechanism to request power levels up to 30 W.
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Specifies the power that the switch budgets for the port.The range is 4000
to 15400 mW.
Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
OL-21522-02