Flow Control

Flow control is a feature defined in the IEEE 802.3x specification, enabling a receiving device to signal congestion to a sending device, which allows for the sending device to temporarily halt transmission, alleviating congestion at the receiving device

  • Flow control— Some Fast Ethernet devices support flow control, where devices can send pause frames, which instruct the remote end to stop sending data for a specific period of time.
  • Flow control— Flow control is important for gigabit Ethernet connections, where it is reasonable for the receive buffers on a gigabit interface to become full due to the high speeds of data transfer, causing congestion on the interface

Flow-control administration. Possible settings:

  1. On indicates the local port requires the far end to send flow control.
  2. Off indicates the local port does not allow the far end to send flow control.
  3. Desired indicates the local end allows the far end to send flow control.