3Com 4800G Series, Configuration Manual

Page: 1198 / 1246

1198 C
HAPTER
93: P
O
E C
ONFIGURATION
Online PSE processing software upgrade may be unexpectedly interrupted (for
example, an error results in device reboot). If you fail to upgrade the PSE
processing software in full mode after reboot, you can power off the device and
restart it before upgrading it again. After upgrade, restart the device manually to
make the original PoE configurations take effect.
Follow these steps to upgrade the PSE processing software online:
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:
c
CAUTION: If you adjust the PD disconnection detection mode when the device is
running, the connected PDs will be powered off. Therefore, be cautious to do so.
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 -
Upgrade the PSE processing
software online poe update { full | refresh }
filename
Optional
To do… Use the command… Remarks
Enter system view system-view -
Configure a PD disconnection
detection mode poe disconnect { ac | dc } Optional
The default PD disconnection
detection mode is AC.
To do… Use the command… Remarks
Enter system view system-view -
Enable the PSE to detect
nonstandard PDs poe legacy enable Optional
Disabled by default.