Configuring Flow Control

By default, flow control is enabled globally on all full-duplex ports.
  1. Enter the global configuration mode. 
    device# configure terminal
  2. Enable flow control negotiation.
    device(config)# interface ethernet 1/1/21
device(config-if-e1000-1/1/21)# flow-control neg-on

    After flow control negotiation is enabled using the flow-control neg-on command, flow control is enabled or disabled depending on the peer advertisement. When flow control is enabled globally and auto-negotiation is on, flow control is advertised on 10/100/1000M ports. If auto-negotiation is off or if the port speed was configured manually, then flow control is not negotiated with or advertised to the peer.

  3. Re-enable flow control on all ports.
    device(config)# flow-control
    When flow control is enabled globally, you can disable and re-enable it on individual ports.

The following example shows how to configure flow control on Ethernet port, 1/1/21.

device# configure terminal
device(config)# interface ethernet 1/1/21
device(config-if-e1000-1/1/21)# flow-control neg-on
Parent topic: Flow Control Configuration