Quick Reference Guide

156 Ethernet Configuration Commands
Example
The following example enables auto negotiation of Ethernet port 5.
flowcontrol
The flowcontrol Interface Configuration mode command configures the Flow Control on a given
interface. Use the no form of this command to restore the default.
Syntax
• flowcontrol { auto | on | off }
• no flowcontrol
• auto — Enables auto-negotiation of Flow Control.
• on — Enables Flow Control.
• off — Disables Flow Control.
Default Configuration
Flow Control is off.
Command Mode
Interface Configuration (Ethernet, port-channel) mode.
User Guidelines
• Flow Control will operate only if duplex mode is set to FULL. Back Pressure will operate only if duplex
mode is set to HALF.
• When Flow Control is ON, the head-of-line-blocking mechanism of this port is disabled.
• If a link is set to NOT use auto-negotiation, the other side of the link must also be configured to not
use auto-negotiation.
•To select auto , ensure negotiation for Flow Control is enabled.
Example
In the following example, Flow Control is enabled on g5.
(config)# interface ethernet g5
(config-if)# negotiation
(config-if)#
Console(config)# interface ethernet g5
Console(config-if)# flowcontrol on
5400_CLI.book Page 156 Wednesday, December 17, 2008 4:33 PM