Users Guide

This command has the following parameters.
• stack unit unit-number — Enter the keywords stack unit and specify the stack unit number. The range is from 1 to 12.
• threshold-value — Enter the power threshold limit value in percentage. Range is from 10 to 99. Default value is 99.
Example of Setting the Global Threshold Limit
The following example sets the global threshold limit for the PoE power budget to 10 percent on stack unit 1.
Dell(conf)#power budget global-threshold stack-unit 1 10
Dell(conf)#exit
Dell#show power detail stack-unit 1
Unit Total System Redundancy Inline Inline Inline Inline Inline
Power Power Power Power Power Power Power Power
Available Consumed Consumed Threshold Available Allocated Consumed Remaining
(Watts) (Watts) (Watts) (%) (Watts) (Watts) (Watts) (Watts)
----------------------------------------------------------------------------------------
1 1100 150 0 10 95 0 0 95
Dell#
Manage Power Priorities
Ports enabled with PoE/PoE+ have power access priorities based on the configuration and the port number.
The power priority is assigned in the following order:
1. Ports configured using power inline mode stack-unit unit-number {class | static} — Ports with static
setting have higher priority than the ports with class setting.
2. Power priority setup using power inline priority {critical | high | low} — The critical has the highest
priority and low has the lowest priority. If you configure a priority with this command, the Dell Networking OS ignores any
LLDP-MED priority on the port. If you do not configure a priority with this command, the Dell Networking OS honors any
LLDP-MED priority
3. Port Number — Ports with lower numbers have more priorities than ports with higher numbers.
Power Allocation to Ports
When PoE/PoE+ is enabled, the power allocated to a port depends on how the PoE/PoE+ is enabled on the port and whether a
device is connected to the port.
• When you configure a port using the power inline command without setting the max_milliwatts power limit option,
the Dell Networking OS does not allocate any power to the port unless a device is connected and there is no limit to the
amount of power consumed by the powered device.
• When you configure a port using power inline with the max_milliwatts power limit option, the Dell Networking OS
does not allocate any power to the port unless a device is connected and restricts the maximum power consumed by the
powered device to the amount set in the
max_milliwatts option.
• If the maximum power required for the connected device is less than the specified power limit, Dell Networking OS
allocates the required amount of power and returns the remaining power to the budget.
• If the maximum power required for the connected device is more than the specified power limit, Dell Networking OS does
not allocate any power.
• If there is no enough power in the budget, the configuration is maintained and the port waits till the required power is
available.
• The max_milliwatts option has no effect on a port, when the port is configured in Class mode.
Power over Ethernet (PoE) 581