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APPENDIX B. FLOW CONTROL
Flow control is a mechanism which allows you to protect the switch from overload conditions and to keep additional traffic off the network when excessive congestion will result. Figure
Figure B-1. Flow Control for Half- and Full-Duplex Applications
Each port of the switch has a transmit queue which buffers frames to be sent out on that port. In this example, large amounts of data are being sent from Workstation A (connected to port X) and other ports on the switch to Workstation B (connected to port Y).The queue on port Y starts filling up with data until it reaches a determined threshold. The packet which causes the threshold to be exceeded triggers the
Since port X is configured with flow control set to Enabled, the switch responds by initiating a pause frame
The
For the
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