Alcatel-Lucent Enterprise OmniSwitch 6865, Руководство пользователя по оборудованию

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OmniSwitch 6865 Hardware Users Guide 45
Priority Disconnect is Enabled; Same Priority Level on All Devices
Reminder. Priority disconnect examples are applicable only when there is
inadequate power remaining to power an incoming device.
When a PD is being connected to a port with the same priority level as all other in the slot, the physical
port number is used to determine whether the incoming PD will be granted or denied power. Due to the
support of different PoE standards and PoE hardware on each platform the internal port priority is
different for each platform. The following tables should be used to determine PoE priority:
Priority Disconnect is Enabled; Incoming PD Port has Highest Priority Level
Reminder. Priority disconnect examples are applicable only when there is
inadequate power remaining to power an incoming device.
When a PD is being connected to a port with a higher priority level than all other in the slot, the
incoming PD will automatically be granted power over the other devices, regardless of its physical port
number.
In order to avoid a power budget deficit, another port in the slot is disconnected. In determining which
port to power off, the system software first selects the port with the lowest configured priority level.
For example, if a critical priority device is being added to a slot in which five existing devices are
attached to high priority and one device is attached to a low priority port, the low priority port is
automatically disconnected, regardless of its physical port number.
If all existing devices are attached to with the same lower priority level, the system software
disconnects the port with both the lowest priority level. For example, if a critical priority device is being
added to a slot in which six existing devices are attached at high priority, the high priority port with the
highest physical port number is automatically disconnected.
Priority Disconnect is Enabled; Incoming PD Port has Lowest Priority Level
Reminder. Priority disconnect examples are applicable only when there is
inadequate power remaining to power an incoming device.
When a PD is being connected to a port with a lower priority level than all other in the slot, the
incoming PD will be denied power, regardless of its physical port number. Devices connected to other
higher-priority will continue operating without interruption.
Priority Disconnect is Disabled
Reminder. Priority disconnect examples are applicable only when there is
inadequate power remaining to power an incoming device.
When priority disconnect is disabled, power will be denied to any incoming PD, regardless of its port
priority status (i.e., low, high, and critical) or physical port number.
PoE Physical Port Priority
1 (Highest) -> 28 (Lowest)