xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch CLI Reference Guide
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Power over Ethernet (PoE) Commands
The Power over Ethernet (PoE) commands in the Command Line Interface (CLI) are listed (along with the appropriate
parameters) in the following table.
Command
Parameters
config poe system
{units [<unitlist> | all]} {power_limit <value 37-370> | power_disconnect_method
[deny_next_port | deny_low_priority_port] | legacy_pd [enable | disable]}
config poe ports
[all | <portlist>] { state [enable | disable] [time_range <range_name 32> | clear_time_range] |
priority [critical | high | low] | power_limit [class_0 | class_1 | class_2 | class_3 | user_define
<value 1000-35000>] } (1)
show poe system
{units <unitlist>}
show poe ports
{ <portlist> }
Each command is listed, in detail, in the following sections.
config poe system
Purpose
Used to configure the parameters for the PoE system-wise function.
Syntax
config poe system {units [<unitlist> | all]} {power_limit <value 37-370> |
power_disconnect_method [deny_next_port | deny_low_priority_port] | legacy_pd
[enable | disable]}
Description
This command is used to configure the parameters for the whole PoE system.
Parameters
units
- Specifies the units that will be configured. If no specified units, all supported PoE units
in the system will be configured.
power_limit
– Configure the power budget for the PoE system. The range which can be
specified is determined by the system. Normally, the minimum setting is 37W and the
maximum setting is 370W. The actual range will depend on power supply capabilities.
power_disconnect_method
– Configure the disconnection method that will be used when the
power budget is running out. When the system attempts to supply power to a new port, if the
power budget is insufficient to do this, the PoE controller will initiate a port disconnection
procedure to prevent overloading the power supply. The controller uses one of the following
two ways to perform the disconnection procedure.
deny_next_port
– the port with the highest port number will be denied regardless of its
priority.
Note that if the disconnect_method is set to deny_next_port, then the power provision will not
utilize the system’s maximum power. There is a 19W safe margin. That is, when the system
has only 19W remaining, this power cannot be utilized.
deny_low_priority_port
– If there are ports that have been supplied power but have a priority
lower than the new port, the port with the lowest priority will be disconnected. This process
will stop until enough power is released for the new port.
Note that if the disconnect_method is set to deny_ low_priority_port, then the power provision
can utilize the system’s maximum power.
legacy_pd
– Specifies the Legacy PD being used.
Restrictions
Only Administrator and Operator-level users can issue this command.
Example usage:
To configure the PoE system wide settings:
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