22.3.5 Notes on using PoE

(1) Power Allocation by power inline allocation limit

If you manually set the per-port power allocation in limit parameter of the configuration command power inline allocation, be sure to read the documentation for the powered device at your own risk.

Set the maximum power consumption of the power receiving device to a value that allows some margin. Manually setting a value that is less than the minimum power consumption required by the power receiving device may detect an overload and stop supplying power to the power receiving device. To recover, execute the operation-command activate power inline.

(2) When a line test is executed

If a line test (internal specification) is executed on PoE port, the power supply continues.

(3) Power supply according to port status

• The power supply is stopped when the system enters the shutdown state.

• When the unit enters inactive status, the power supply is continued.

(4) About PoE Feed Volume Extension

PoE power supply can be expanded when two power supply units are used by setting the configuration command power redundancy-mode combined.

However, if one of the power supplies stops while the total power supply of the entire device exceeds the maximum supply capacity of a single power supply unit, the power supply of all ports stops and the device restarts.

After restarting, PoE power supply is restarted according to the operation status of the power supply.

(5) Behavior in a Stacked Configuration

The stacking PoE supports all functions such as max power supply and prioritized control, while the control operates on a per-member switch basis.

For example, when stacking two models that support PoE, if the power feeding status of one member switch exceeds the max. power feeding capacity, prioritized control will operate with the corresponding switch, but this will not affect the power feeding status of other member switches.

The configuration command power inline priority-control disable and power inline delay are the same for all member switches during stacking operation.