H3C S5120-SI Series Configuration Guide

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When the sum of the power consumption of all powered PoE interfaces on a PSE exceeds the
maximum power of the PSE, the system considers the PSE is overloaded (The maximum PSE power
is decided by the user configuration).
Follow these steps to enable PoE for a PoE interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter PoE interface view
interface interface-type
interface-number
—
Enable PoE for the PoE
interface
poe enable
Required
Disabled by default.
Configure PoE interface power
supply mode
poe mode signal
Optional
signal (power over signal
cables) by default.
Configure a description for the
PD connected to the PoE
interface
poe pd-description text
Optional
By default, no description for
the PD connected to the PoE
interface is available.
Detecting PDs
Enabling the PSE to Detect Nonstandard PDs
There are standard PDs and nonstandard PDs. Usually, the PSE can detect only standard PDs and
supply power to them. The PSE can detect nonstandard PDs and supply power to them only after the
PSE is enabled to detect nonstandard PDs.
Follow these steps to enable the PSE to detect nonstandard PDs:
To do… Use the command… Remarks
Enter system view system-view —
Enable the PSE to detect
nonstandard PDs
poe legacy enable
Required
By default, the PSE can
detect standard PDs rather
than nonstandard PDs.
Configuring a PD Disconnection Detection Mode
To detect the PD connection with PSE, PoE provides two detection modes: AC detection and DC
detection. The AC detection mode is energy saving relative to the DC detection mode.
Follow these steps to configure a PD disconnection detection mode:

H3C S5120-SI Series Specifications

General

Brand	H3C
Model	S5120-SI Series
Category	Switch
Language	English