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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.
Содержание ME 3600X
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