Power Over Ethernet (Poe) - Siemens SCALANCE XM-400 Configuration Manual

Description

2.4 Power over Ethernet (PoE)

A reconfiguration is necessary if you use functions based on MAC addresses.
Note
In terms of the C-PLUG / KEY-PLUG, the SCALANCE devices work in two modes:
● Without C-PLUG / KEY-PLUG
The device stores the configuration in internal memory. This mode is active when no C-
PLUG / KEY-PLUG is inserted.
● With C-PLUG / KEY-PLUG
The configuration stored on the C-PLUG / KEY-PLUG is displayed over the user interfaces.
If changes are made to the configuration, the device stores the configuration directly on the
C-PLUG / KEY-PLUG and in the internal memory. This mode is active as soon as a C-
PLUG / KEY-PLUG is inserted. When the device is started with a C-PLUG / KEY-PLUG
inserted, the device starts up with the configuration data on the C-PLUG / KEY-PLUG.
Note
Incompatibility with previous versions with C-PLUG / KEY-PLUG inserted
During the installation of a previous version of the firmware, the configuration data can be lost.
In this case, the device starts up with the factory settings after the firmware has been installed.
In this situation, if a C-PLUG / KEY-PLUG is inserted in the device, following the restart, this
has the status "Not Accepted" since the C-PLUG / KEY-PLUG still has the configuration data
of the previous more up-to-date firmware. This allows you to return to the previous, more up-
to-date firmware without any loss of configuration data. If the original configuration on the C-
PLUG / KEY-PLUG is no longer required, the C-PLUG / KEY-PLUG can be deleted or rewritten
manually.
License information on the KEY-PLUG
In addition to the configuration, the KEY-PLUG also contains a license that allows the use of
layer 3 functions.
2.4 Power over Ethernet (PoE)
General
"Power over Ethernet" (PoE) is a power supply technique for network components according
to IEEE 802.3af or IEEE 802.3at. The power is supplied over the Ethernet cables that connect
the individual network components together. This makes an additional power cable
unnecessary. PoE can be used with all PoE-compliant network components that have a
maximum power consumption of max. 25.50 W.
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SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12