Dell Networking 2048, Reference Manual

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Power Over Ethernet Commands
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Power Over Ethernet Commands
Dell Networking N2000/N3000 Series Switches
The Dell Networking PoE solution implements the PoE+ specification
(IEEE 802.3at). IEEE 802.3at allows power to be supplied to Class 4 PD
devices that require power greater than 15.4 Watts and up to 34.2 Watts. This
allows the PoE+ enabled network switches and routers to be used for
deployment with devices that require more power than the 802.3AF
specification allows. PoE+ 802.3at is compatible with 802.1AF.
NOTE:
This section applies to the N2024P/N2048P/N3024P/N3048P switches.
Flexible Power Management
The Dell Networking PoE solution provides power management which
supports power reservation, power prioritization and power limiting. The
operator can assign a priority to each PoE port. When the power budget of
the PoE switch has been exhausted, the higher priority ports are given
preference over the lower priority ports. Lower priority ports are forcibly
stopped to supply power in order to provide power to higher priority ports.
The static power management feature allows operators to reserve a
guaranteed amount of power for a PoE port. This is useful for powering up
devices which draw variable amounts of power and provide them an assured
power range within which to operate. Class based power management
allocates power at class limits as opposed to user defined limits.
In the Dynamic Power management feature, power is not reserved for a given
port at any point of time. The power available with the PoE switch is
calculated by subtracting the instantaneous power drawn by all the ports from
the maximum available power. Thus, more ports can be powered at the same
time. This feature is useful to efficiently power up more devices when the
available power with the PoE switch is limited.
The Dell Networking PoE solution also provides a global usage threshold
feature in order to limit the PoE switch from reaching an overload condition.
The operator can specify the limit as a percentage of the maximum power.
NOTE:
PoE commands are only applicable to copper ports.
2CSNXXX_SWUM200.book Page 1525 Tuesday, December 10, 2013 1:22 PM