4.8 C-PLUG/KEY-PLUG
4.8.1 Function of the C-PLUG/KEY-PLUG
NOTICE
Do not remove or insert a C-PLUG/KEY-PLUG during operation
A C-PLUG/KEY-PLUG may only be removed or inserted when the device is turned o.
Saving conguration data and enabling layer 3 functionality
A PLUG is an exchangeable storage medium for storing the conguration data of the device. This
allows fast and uncomplicated replacement of a device. The PLUG is taken from the previous
device and inserted in the new device. The rst time it is started up, the replacement device has
the same conguration as the previous device except for the device-specic MAC address set by
the vendor.
A C-PLUG stores the current information about the conguration of a device.
In addition to the conguration, a KEY-PLUG also contains a license with which layer 3
functionality is enabled.
Note
The device can also be operated without a C-PLUG/KEY-PLUG.
How it works
Operating mode
In terms of the C-PLUG / KEY-PLUG, there are three modes for the device:
• Without C-PLUG/KEY-PLUG
The device stores the conguration in internal memory.
This mode is active if no C-PLUG/KEY-PLUG is inserted.
• With unwritten C-PLUG/KEY-PLUG
If an unwritten C-PLUG/KEY-PLUG (factory status or deleted with Clean function) is used, the
local conguration already existing on the device is automatically stored on the inserted C-
PLUG/KEY-PLUG during startup.
This mode is active as soon as an unwritten C-PLUG/KEY-PLUG is inserted.
• With written C-PLUG/KEY-PLUG
A device with a written and accepted C-PLUG/KEY-PLUG ("ACCEPTED" status) automatically
uses its conguration data during startup.
Acceptance is only possible if the data was written by a compatible device type.
This mode is active as soon as a written C-PLUG/KEY-PLUG is inserted.
Description of the device
4.8 C-PLUG/KEY-PLUG
SCALANCE XM-400
38 Operating Instructions, 03/2021, C79000-G8976-C306-10
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