xStack
®
DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch CLI Reference Guide
769
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.
legacy_pd
- (Optional) Configure legacy PDs detection status, enable for support, if set to
disable, can’t detect legacy PDs signal.
enable
- Specify that the legacy PDs detection status will be enabled.
disable
- Specify that the legacy PDs detection status will be disabled.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To config PoE system-wise was setting:
DGS-3120-24PC:admin# config poe system power_limit 250 power_disconnect_method
deny_low_priority_port
Command: config poe system power_limit 250 power_disconnect_method
deny_low_priority_port
Success.
DGS-3120-24PC:admin#
77-2
config poe ports
Description
This command is used to configure the PoE port settings.
Based on 802.3af, there are 5 kinds of PD classes, class 0, class 1, class 2, and class 3. The
power consumption ranges for them are 0.44~12.95W, 0.44~3.84W, 3.84~6.49W, 6.49~12.95W,
and 12.95~ 29.5W, respectively.
The five pre-defined settings are for users’ convenience: The following is the power limit applied to
the port for these four classes. For each class, the power limit is a little more than the power
consumption range for the class. This takes the factor of the power loss on cable into account.
Thus, the following are the typical values defined by the chip vendor.
Class 0: 15400mW
Class 1: 4000mW
Class 2: 7000mW
Clase 3: 15400mW
Other than these four pre-defined settings, users can directly specify any value that the chip
supported, Normally, the minimum setting is 1000mW, and the maximum setting is 15400mW for
802.3af and >=35000mW for 802.3at.
NOTE:
If the switch fails to supply power to the Powered Device (PD) that supports the IEEE
802.3at standard,
1. Check if the PD connected to the port, supports the IEEE 802.3at standard.
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