Port Prioritization - Allied Telesis x530DP Series Installation Manual

The switch can handle different power requirements on different ports.
This enables you to connect different classes of PoE equipment to the
ports on the switch.
Port
If the power requirements of the powered devices exceed the switch
power budget, the switch denies power to some ports based on a system
Prioritization
called port prioritization. Use this mechanism in the distribution of power if
the demands of the devices exceed the available capacity. This ensures
that powered devices critical to the operation of your network are given
preferential treatment by the switch.
There are three priority levels:
Ports set to the Critical level, the highest priority level, are guaranteed
power before any of the ports assigned to the other two priority levels.
Ports assigned to the other priority levels receive power only if all the
Critical ports are receiving power. Ports that are connected to your most
critical powered devices must be assigned to this level. If there is not
enough power to support all the ports set to the Critical priority level, power
is provided to the ports based on port number, in ascending order.
The High level is the second highest level. Ports set to this level receive
power only if all the ports set to the Critical level are already receiving
power. It there is not enough power to support all of the ports set to the
High priority level, power is provided to the ports based on port number, in
ascending order.
The lowest priority level is Low. This is the default setting. Ports set to this
level only receive power if all of the ports assigned to the other two levels
are already receiving power. As with the other levels, if there is not enough
power to support all of the ports set to the Low priority level, power is
provided to the ports based on port number, in ascending order.
Power allocation is dynamic. Ports supplying power to powered devices
can cease power transmission if the switch power budget is at maximum
usage and new powered devices, connected to ports with higher priorities
become active.
Critical

High

Low

x530DP Series Installation Guide for Virtual Chassis Stacking
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