Cisco Catalyst 3750 Software Configuration Manual page 194

Configuring Ethernet Interfaces
Command
Step 3 speed {10 | 100 | 1000 | auto | nonegotiate} Enter the appropriate speed parameter for the port:
Step 4 duplex {auto | full | half}
Step 5 end
Step 6
show interfaces interface-id
Step 7
copy running-config startup-config
Use the no speed and no duplex interface configuration commands to return the interface to the default
speed and duplex settings (autonegotiate). To return all interface settings to the defaults, use the default
interface interface-id interface configuration command.
This example shows how to set the speed to 10 Mbps and the duplex mode to half on an port:
Switch# configure terminal
Switch(config)# interface fasttethernet1/0/3
Switch(config-if)# speed 10
Switch(config-if)# duplex half
Catalyst 3750 Metro Switch Software Configuration Guide
9-14
Purpose
• Enter 10, 100, or 1000 to set a specific speed for the port. The
1000 keyword is not available on 10/100 Mbps ports. These
keywords are available on SFP module ports only when a
1000BASE-T SFP module is inserted.
Enter auto to enable the port to autonegotiate speed with the
•
device connected to the port. This option is available on SFP
module ports only when a 1000BASE-T SFP module is inserted.
The nonegotiate keyword is available only for SFP module ports.
•
SFP module ports operate only at 1000 Mbps but can be
configured to not negotiate if connected to a device that does not
support autonegotiation.
Note When a 1000BASE-T SFP module is in the SFP module port,
the speed can be configured to 10, 100, 1000, or auto, but not
nonegotiate. However, ES ports operate only at 1000 Mbps.
If you configure a 1000BASE-T SFP module in an ES port to
operate at 10 or 100 Mpbs or to autonegotiate to 10 or
100 Mbps, the interface experiences large numbers of traffic
errors.
Enter the duplex parameter for the interface.
This command is not available on SFP module ports unless a
1000BASE-T SFP module is inserted, when the mode can then be
configured to auto or full.
Return to privileged EXEC mode.
Display the interface speed and duplex mode configuration.
(Optional) Save your entries in the configuration file.
Chapter 9 Configuring Interface Characteristics
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