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Cisco ASR 901 Aggregation Services Router Command Reference Guide
OL-26031-07
Chapter 1 CLI Command Reference
duplex
duplex
To configure duplex operation on an interface, use the
duplex
command in interface configuration mode.
Use the
no
form of this command to return to the default value.
duplex
[
full
|
half
]
no duplex
Syntax Description
Defaults
Full-duplex mode
Command Modes
Interface configuration
Command History
Usage Guidelines
Duplex Options and Interfaces
Table 1-1
lists the supported command options by interface.
If the transmission speed on a 16-port RJ-45 Gigabit Ethernet port is set to 1000, the duplex mode is set
to full. If the transmission speed is changed to 10 or 100, the duplex mode stays at half duplex. You must
configure the correct duplex mode when the transmission speed is changed to 10 or 100 from 1000.
Gigabit Ethernet is full duplex only. You cannot change the duplex mode on Gigabit Ethernet ports or
on a 10/100/1000-Mbps port that is configured for Gigabit Ethernet.
When manually configuring the interface speed to either 10 or 100 Mbps, you should also configure the
duplex mode on the interface.
full
Specifies full-duplex operation.
half
Specifies half-duplex operation.
Release
Modification
15.1(2)SNG
Support for this command was introduced on the Cisco ASR 901 router.
Table 1-1
Supported duplex Command Options
Interface Type
Supported
Syntax
Default Setting
Usage Guidelines
Gigabit Ethernet
Interfaces
duplex
full
full
10-Mbps ports
duplex
[
half
|
full
]
half
100-Mbps ports
duplex
[
half
|
full
]
half