Users Guide

Managing Power Priorities
PoE or PoE+ enabled port extender ports have power access priorities based first on the priority configured and then on their port
number.
The default priority is with respect to the port numbers, the lower port numbers have higher priorities when compared with higher port
numbers
You can augment the default prioritization using the [no] power inline {[max_milliwatts] | priority {critical |
high | low}} command, where critical is the highest priority and low is the lowest priority.
NOTE: If you configure a priority with this command, the Dell Networking OS ignores any LLDP-MED priority on this port. If you
do not configure a port priority with this command, the Dell Networking OS honors any LLDP-MED priority.
In general, priority is assigned in this order:
1 power inline priority {critical | high | low} setting or priority advertised by LLDP TLV.power inline mode
pe pe—id stack-unit unit-number {class | static} setting:
NOTE: The power inline static setting has a higher priority for access to power than those configured using the class
setting.
2 port number .
NOTE
: By default, all ports are set to low priority.
Configuring Power Management on the PE — Class and Static
Mode
By default, PoE or PoE+ are disabled.
To manage the inline power supplied to the port extender ports, use the power inline mode command in Configuration mode. The
mode configuration applies to all the ports on the port extender. To manage the inline power in a port extender, you can configure Class or
Static mode.
This command has the following parameters.
• class — When you configure Class mode, the maximum power for the particular class of device is allocated. Class mode supports
power allocation through Layer 2 classification and power negotiation by the LLDP 802.3at standard. If you are configuring port
priority, use Class mode. For information about port priority, see Managing Ports using Power Priority and the Power Budget and
Allocating PoE Power to Power Devices to a Connected PE Interface For information about classes for powered devices, see Power
over Ethernet (PoE).
NOTE
: The power inline max_milliwatts command enables the inline power supplied to an interface. 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. Instead, the maximum limit in Class mode applies to all the
ports on the port extender. For more information, see Allocating PoE Power to Power Devices from a PE Interface.
• static — When you configure Static mode, the inline power allocates based on the actual power consumption by the powered
device (PD). The power the PD requests is given and reduced from the available pool. Power negotiation through LLDP (extended
power via MDI TLVs or IEEE 802.3 at power-via-mdi TLVs) is not supported in static mode. Ports you configure in Static mode reserve
a fixed power allocation whether a device is connected or not. By default, 15.4 W is allocated for PoE and 30.0 W for PoE+. No
dynamic PoE/PoE+ class detection performs on Static ports. The default Power Management mode is
static.
• pe pe-id — Specify the port extender ID. The range is from 0 to 255.
• stack-unit unit-number — Specify the stack unit number of the port extender. The range is from 0 to 7.
• Enable PoE and configure Power Management mode on a port extender.
Configuration mode
power inline mode pe pe—id stack-unit unit-number{static | class}
Power over Ethernet (PoE)
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