Administrator Guide

Allocate PoE Power to Powered Devices to a Connected PE
Interface
To enable inline power and configure the maximum power allocation and priority for the powered device connected to a port
extender interface, use the power inline {[max_milliwatts] | priority {critical | high | low}}
command in Interface mode. By default, power inline is disabled.
Port Prioritization
To specify the priority on a particular interface on the port extender, use the power inline priority command. When you
reduce the inline power available in a port extender, the lower priority interfaces are disabled initially then the higher priority
interfaces are disabled. Between equal priority ports, the port number determines which port is assigned the higher priority. Port
0 has the highest priority and port 47 has the lowest priority. For more information, see Managing Power Priorities and
Managing Ports using Power Priority and the Power Budget.
On a port extender interface, you can configure one of the following priority levels: critical, high, and low. By default, all
ports are set to low.
When you reduce the available inline power, the order of priority for disabling the inline power to the interfaces is as follows:
1. Ports with low priority are shut down first.
2. Ports with a high priority are shut down second.
3. Ports with a critical priority are shut down third.
NOTE: When you configure the ports with the same priority levels, the port number determines which port has the
highest priority (port 1 has the highest priority; port 48 has the lowest priority). The ports with the higher interface
numbers for inline power disable first. The ports with the lower interface numbers have the highest priority. For example,
if you configure ports 1, 2, 47, and 48 with a low priority and the inline power available becomes less, PoE is disabled on
the ports in the following order:
a. port 48
b. port 47
c. port 2
d. port 1
NOTE: Avoid allocating more power than necessary to a port because allocated power is made unavailable to other ports
regardless of whether it is consumed when using the power inline max_milliwatts command. Typical IP phones
use 3 to 10 Watts.
The power inline command has the following parameters:
● max_milliwatts — (OPTIONAL) Specify the maximum inline power that is allocated to a powered device connected to
the interface. The range if from 440 to 30000 mW. When you do not configure a power value, the system uses the default
value (30000 mW).
NOTE:
The max_milliwatts option only works when you use Static Management mode. When you enable Class
mode, the max_milliwatts option has no effect on the interface. For information about Class Power Management
mode, see Configuring Power Management Mode - Class and Static Mode.
● priority — Enter the keyword priority to configure the powered device to connect to the interface.
● critical — Enter the keyword critical to set the PoE priority level as critical.
● high — Enter the keyword high to set the PoE priority level as high.
● low — Enter the keyword low to set the PoE priority level as low. By default, all ports are set to low priority.
● Configure the maximum power allocation and priority for the powered device connected to a port extender interface.
Interface Mode
power inline {[max_milliwatts] | priority {critical | high | low}}
The following example sets the maximum allocated power to interface peGigE 255/0/1 3000 mW.
Example of Setting the Maximum Allocated Power to an Interface
Dell(conf)#interface peGigE ?
PE-ID/UNIT/PORT PE Gigabit Ethernet interface number
Dell(conf)#int peGigE 0/0/1
758
Power over Ethernet (PoE)