Setting The Interface Speed And Duplex Parameters - Cisco IE 3000 Software Configuration Manual

Configuring Ethernet Interfaces
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Changing the interface speed and duplex mode configuration might shut down and re-enable the
Caution
interface during the reconfiguration.

Setting the Interface Speed and Duplex Parameters

Beginning in privileged EXEC mode, follow these steps to set the speed and duplex mode for a physical
interface:
Command
Step 1 configure terminal
Step 2 interface interface-id
Step 3
speed {10 | 100 | 1000 | auto [10 | 100 |
1000] | nonegotiate}
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.
Cisco IE 3000 Switch Software Configuration Guide
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If one interface supports autonegotiation and the other end does not, configure duplex and speed on
both interfaces; do not use the auto setting on the supported side.
When STP is enabled and a port is reconfigured, the switch can take up to 30 seconds to check for
loops. The port LED is amber while STP reconfigures.
Purpose
Enter global configuration mode.
Specify the physical interface to be configured, and enter interface
configuration mode.
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 Mb/s ports.
• 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 Mb/s but can be
configured to not negotiate if connected to a device that does not
support autonegotiation.
For more information about speed settings, see the
Configuration Guidelines" section on page
Enter the duplex parameter for the interface.
Enable half-duplex mode (for interfaces operating only at 10 or
100 Mb/s). You cannot configure half-duplex mode for interfaces
operating at 1000 Mb/s.
For more information about duplex settings, see the
Duplex Configuration Guidelines" section on page
Return to privileged EXEC mode.
Display the interface speed and duplex mode configuration.
(Optional) Save your entries in the configuration file.
Chapter 11 Configuring Interface Characteristics
"Speed and Duplex
11-13.
"Speed and
11-13.
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