Users Guide

Setting the Threshold Limit for the PoE
Power Budget
To set the global threshold limit of the total power available for PoE on the port extender, use the power
budget global-threshold pe
pe-id stack-unit unit-number threshold-value command in
Configuration mode.
This command has the following parameters.
• pe pe-id — Enter the keyword PE and specify the port extender ID. The range is from 0 to 255.
• stack unit unit-number — Enter the keywords stack unit and specify the stack unit number of
the port extender. The range is from 0 to 7.
• threshold-value — Enter a value between 20 and 99. The default value is 90 (90 percent).
• Set the global threshold limit of the total power available for PoE on the port extender. You must be in
Configuration mode.
power budget global-threshold pe pe-id stack-unit unit-number threshold-value
Example of Setting the Global Threshold Limit for the PoE Power Budget
The following example sets the global threshold limit for the PoE power budget to 99 percent on port
extender 0 on stack unit 0.
Dell(conf)#power budget global-threshold pe 0 stack-unit 0 99
Dell#show power detail pe 0 stack-unit 0
Unit Total System Redundancy Inline Inline Inline Inline Inline
Power Power Power Power Power Power Power Power
Available Consumed Consumed Threshold Available Allocated Consumed Remain
(Watts) (Watts) (Watts) (%) (Watts) (Watts) (Watts) (Watts)
--------------------------------------------------------------------------------
0/0 1000 150 0
99 841 0 0 841
Advertising the Extended Power
through MDI
The power device sends the following information in the LLDP-MED extended power-via-MDI TLV.
1 Power Requirement: Dell Networking OS uses it for power allocation
2 Power Priority — Critical, High, or Low: Dell Networking OS uses it for power priority calculation.
3 External Power Source: Dell Networking OS does not use this information. IEEE 802.3at power-via-mdi
TLV
To configure the system or an interface to advertise IEEE 802.1ab extended power-via-mdi TLV, use the
advertise med power-via-mdi command.
Power over Ethernet (PoE) 880