Ethernet Configuration Commands 407
User Guidelines
When both speed and duplex are configured to auto, auto negotiation is
enabled for the port. To disable auto-negotiation on a port, it is necessary to
enter both the speed and duplex commands without using the auto
parameter. Fiber ports do not support auto-negotiation and therefore require
the operator to enter the duplex full command and the speed
command with the desired operating bandwidth. Disabling auto-negotiation
on 1G copper ports may lead to random frame loss as the clock master has not
been arbitrated by the auto-negotiation process. Auto-negotiation is required
on 10G/40G copper ports, and is recommended on all copper ports.
Example
The following example configures the duplex operation of gigabit Ethernet
port 1/0/5 to force full duplex operation.
console(config)# interface gigabitethernet 1/0/5
console(config-if)# duplex full
flowcontrol
Use the flowcontrol command in Global Configuration mode to configure
the flow control. To disable flow control, use the no form of this command.
Syntax
flowcontrol
no flowcontrol
Default Configuration
Flow Control is enabled by default.
Command Mode
Global Configuration mode
User Guidelines
This command has no user guidelines.
2CSPC4.X8100-SWUM102.book Page 407 Friday, March 15, 2013 8:56 AM