Cisco ME 3600X User Manual

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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands
duplex
duplex
To specify the duplex mode of operation for a port, use the duplex command in interface configuration
mode. To return the port to its default value, use the no form of this command.
duplex {auto | full | half}
no duplex
Note This command is not available on 10 Gigabit Ethernet ports.
Syntax Description
Defaults The default is auto for Fast Ethernet and Gigabit Ethernet ports and for 1000BASE-T small form-factor
pluggable (SFP) modules.
The default is half for 100BASE-FX MMF SFP modules.
Command Modes Interface configuration
Command History
Usage Guidelines This command is visible for an SPP module only when a 1000BASE-T SFP module or a 100BASE-FX
MMF SFP module is in the SFP module slot. All other SFP modules operate only in full-duplex mode.
• When a 1000BASE-T SFP module is in the SFP module slot, you can configure duplex mode to auto
or full.
• When a 100BASE-FX MMF SFP module is in the SFP module slot, you can configure duplex mode
to half or full. Although the auto keyword is available, it puts the interface in half-duplex mode (the
default) because the 100BASE-FX MMF SFP module does not support autonegotiation.
Certain ports can be configured to be either full duplex or half duplex. Applicability of this command
depends on the device to which the switch is attached.
For Gigabit Ethernet ports, setting the port to auto has the same effect as specifying full if the attached
device does not autonegotiate the duplex parameter.
auto Enables automatic duplex configuration; port automatically detects whether it
should run in full- or half-duplex mode, depending on the attached device mode.
full Enables full-duplex mode.
half Enables half-duplex mode (only for interfaces operating at 10 Mbps or 100 Mbps).
You cannot configure half-duplex mode for interfaces operating at 1000 Mbps or
10,000 Mbps.
Release Modification
12.2(52)EY This command was introduced.

Cisco ME 3600X Specifications

General

Brand	Cisco
Model	ME 3600X
Category	Switch
Language	English