Qtech QSW-3300-28F-AC-AC [233/693] Flexible power management

Qtech QSW-3300-28F-AC-AC [233/693] Flexible power management
Power Over Ethernet Commands
Software User Manual
CLI Command Reference
Page 250
PoE implements the PoE+ specification (IEEE 802.3at) for power sourcing equipment (PSE). 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.
Flexible Power Management
PoE provides power management that 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.
PoE 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.
poe high-power
Use this command to enable high power mode for all ports in all units (Global Configuration) or for a specific unit
(Interface Configuration mode). In high power mode, the switch negotiates the power budget with the powered
device (PD). The maximum power a POE port is capable of delivering is 32W in dot3at mode and 60W in upoe
mode.
Note: PoE commands are only applicable to copper ports.
Default Disable
Format
poe high-power {dot3at | legacy | pre-dot3at | upoe}
Mode Global Configuration
Interface Configuration
Parameter Description
dot3at High power device with LLDP support
legacy Powered device with a high-inrush current
pre-dot3at Powered device without LLDP support
upoe Forces power to be delivered using four pairs of the cable.

Содержание

Скачать