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DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch CLI Manual
458
62
P
OWER OVER
E
THERNET
(P
O
E)
C
OMMANDS
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] | management_mode [power_limit |
auto] | legacy_pd [enable | disable]}(1)
config poe ports
[all | <portlist>] { state [enable | disable] | [time_range <range_name32> |
clear_time_range] | priority [critical | high | low] | power_limit [class_0 | class_1 |
class_2 | class_3 | user_define <value 1000-16800>]}
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] |
management_mode [power_limit | auto] | legacy_pd [enable | disable]}(1)
Description
Configure the parameters for the whole PoE system.
Parameters
units
- Specified 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 of PoE system. The range of value which can be
specified is determined by the system. Normally, the minimum setting is 37 W and the
maximum setting is 370 W. The actual range will depend on power supply capability.
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, PoE controller will initiate 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 max 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 that 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.
management_mode
- In auto mode, POE supply the max power on a PD is 15.4W. In
power_limit mode, POE allocates PD's Power based on PD requirement which is the range of
port's POE configuration.
legacy_pd
- Configure legacy PDs detection status, enable for support, if set to disable, can’t
detect legacy PDs signal.
Restrictions
Only Administrator and Operator-level users can issue this command.
