Description
3.4 C-PLUG
SCALANCE W-784-1xx / SCALANCE W-74x-1
Operating Instructions (Compact), Release 08/2007, A5E01174713-02
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3.4 C-PLUG
Configuration information on the C-PLUG
The C-PLUG is used to transfer the configuration of the old device to the new device when a
device is replaced. When the new device starts up with the C-PLUG, it then continues
automatically with exactly the same configuration as the old device. One exception to this
can be the IP configuration if it is set over DHCP and the DHCP server has not been
reconfigured accordingly.
Reconfiguration is necessary if you use WDS or redundancy with devices with more than
one WLAN interface and use the MAC addresses and not the sysNames. These functions
are then based on the MAC address that inevitably changes if a device is replaced.
Note
In terms of the C-PLUG, the SCALANCE W-700 devices work in two modes:
• Without C-PLUG
The device stores the configuration in internal memory. This mode is active when no C-
PLUG is inserted.
• With C-PLUG
The configuration stored on the C-PLUG is displayed over the user interfaces. In this
mode, the internal memory is neither read nor written. If changes are made to the
configuration, the device stores the configuration directly on the C-PLUG. This mode is
active when no C-PLUG is inserted. As soon as the device is started with a C-PLUG
inserted, the SCALANCE W-700 starts up with the configuration data on the C-PLUG.
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