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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter9 Configuring Interface Characteristics
Configuring Ethernet Interfaces
Use the no speed and no duplex interface configuration commands to return the interface to the d efault
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 interface speed to 10 Mbps and the duplex mode to half on a
10/100 Mbps port:
Switch# configure terminal
Switch(config)# interface fasttethernet0/3
Switch(config-if)# no shutdown
Switch(config-if)# speed 10
Switch(config-if)# duplex half
This example shows how to set the interface speed to 100 Mbps on a 10/100/1000 Mbps port:
Switch# configure terminal
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# speed 100
Step4 speed {10 | 100 | 1000 | auto [10 | 100 |
1000] | nonegotiate}Enter the appropriate speed parameter for the interface:
•Enter 10, 100, or 1000 to set a specific speed for the interface.
The 1000 keyword is available only for 10/100/1000 Mbps ports
or SFP module ports with a 1000BASE-T SFP module.
•Enter auto to enable the interface to autonegotiate speed with the
connected device. If you use the 10, 100, or the 1000 keywords
with the auto keyword, the port autonegotiates only at the
specified speeds.
•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 Cisco1000BASE-T SFP module is in the SFP module
slot, the speed can be configured to 10, 100, 1000, or to auto,
but not to nonegotiate.
Step5 duplex {auto | full | half} Enter the duplex parameter for the interface.
Enable half-duplex mode (for interfaces operating only at 10 or
100 Mbps). You cannot configure half-duplex mode for interfaces
operating at 1000 Mbps.
You can configure the duplex setting when the speed is set to auto.
This command is not available on SFP module ports with these
exceptions:
•If a Cisco 1000BASE-T SFP module is inserted, you can
configure duplex to auto or to full.
•If a Cisco 100BASE-FX SFP module is inserted, you can
configure duplex to full or to half. Although the auto keyword is
available, it puts the interface in half-duplex mode (the default).
Step6 end Return to privileged EXEC mode.
Step7 show interfaces interface-id Display the interface speed and duplex mode configuration.
Step8 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose