Siemens SCALANCE XC-200 Configuration Manual page 478

Load control
10.4 Flow control
The parameters have the following meaning:
Parameter
on
off
Result
The settings for the flow control function are configured.
Further notes
You can display the status of this function with the show flow-control command.
You disable "Auto negotiation" with the no negotiation command.
You enable "Auto negotiation" with the negotiation command.
478
Description
Enables the function
Disables the function
SCALANCE XB-200/XC-200/XF-200BA/XP-200/XR-300WG Command Line Interface
Range of values / note
You can only enable or disable flow control when the
"Auto negotiation" function is turned off. Afterwards
you can enable "Auto negotiation" again.
To use the flow control function, enable flow control
at the appropriate input and output ports.
If a packet is sent from an input port with flow control
enabled to an output port with flow control enabled,
the packet is not discarded if there is overflow. If flow
control is enabled only on the input port, the packet
can be discarded if there is overload.
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Configuration Manual, 07/2017, C79000-G8976-C361-06