Brocade Communications Systems 6650 manual Negotiation and advertisement of flow control

2 Basic port parameter configuration

To disable flow control, enter the no flow-controlcommand.

Brocade(config)# no flow-control

To turn the feature back on, enter the flow-controlcommand.

Brocade(config)# flow-control

Syntax: [no] flow-control

NOTE

For optimal link operation, link ports on devices that do not support 803.3u must be configured with like parameters, such as speed (10,100,1000), duplex (half, full), MDI/MDIX, and Flow Control.

Negotiation and advertisement of flow control

By default, when flow control is enabled globally and auto-negotiation is ON, flow control is enabled and 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. For details about auto-negotiation, refer to “Port speed and duplex mode modification” on page 32.

To disable flow control capability on a port, enter the following commands.

Brocade(config)# interface ethernet 1/1/1

Brocade(config-if-e10000-1/1/1)# no flow-control

To enable flow control negotiation, enter the following commands.

Brocade(config)# interface ethernet 1/1/1 Brocade(config-if-e10000-1/1/1)# flow-control neg-on

Error - This command is not supported for fiber ports and gbic copper optics

The error message is displayed because auto-negotiation of flow control is not supported on 10 Gbps and 40 Gbps ports.

Syntax: [no] flow-control [neg-on]

•flow-control[default] - Enable flow control, flow control negotiation, and advertise flow control

•no flow-controlneg-on- Disable flow control negotiation

•no flow-control- Disable flow control, flow control negotiation, and advertising of flow control

After flow control negotiation is enabled using the flow-controlneg-oncommand option, flow control is enabled or disabled depending on the peer advertisement.

Commands may be entered in IF (single port) or MIF (multiple ports at once) mode.

Example

Brocade(config)# interface ethernet 1/1/1

Brocade(config-if-e10000-1/1/1)# no flow-control

This command disables flow control on port 1/1/1.

Brocade(config)# interface ethernet 1/1/1 to 1/1/2

Brocade(config-mif-1/1/1-1/1/2)# no flow-control

This command disables flow control on ports 1/1/1 to 1/1/2.

36	Brocade ICX 6650 Administration Guide
	53-1002600-01