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Cisco ASR 901 Aggregation Services Router Command Reference Guide
OL-26031-07
Chapter 1 CLI Command Reference
duplex
Caution
Changing the interface speed and duplex mode configuration might shut down and reenable the interface
during the reconfiguration.
Table 1-2
describes the interface behavior for different combinations of the
duplex
and
speed
command
settings. The specified
duplex
command configured with the specified
speed
command produces the
resulting system action.
Note
If you need to force an interface port to operate with certain settings and therefore disable
autonegotiation, you must be sure that the remote link is configured with compatible link settings for
proper transmission. This includes support of flow control on the link.
Examples
The following example shows how to configure duplex half operation:
Router(config)#
interface gigabitethernet0/0
Router(config-if)#
duplex half
Related Commands
Table 1-2
Relationship Between duplex and speed Commands
duplex Command
speed Command
Resulting System Action
duplex half
speed 10
Forces 10-Mbps and half-duplex operation, and
disables autonegotiation on the interface.
duplex full
speed 10
Forces 10-Mbps and full-duplex operation, and
disables autonegotiation on the interface.
duplex half
speed 100
Forces 100-Mbps and half-duplex operation, and
disables autonegotiation on the interface.
duplex full
speed 100
Forces 100-Mbps and full-duplex operation, and
disables autonegotiation on the interface.
duplex full
speed 1000
Forces 1000-Mbps and full-duplex operation,
and disables autonegotiation on the interface
(Gigabit Ethernet only).
Command
Description
interface
Selects an interface to configure and enters interface configuration
mode.
interface gigabitethernet
Selects a particular Gigabit Ethernet interface for configuration.
show controllers
Displays information that is specific to the hardware on a module.
show controllers
gigabitethernet
Displays Gigabit Ethernet interface information, transmission statistics
and errors, and applicable MAC destination address and VLAN
filtering tables.
show interfaces
Displays traffic that is seen by a specific interface.
show interfaces
gigabitethernet
Displays information about the Gigabit Ethernet interfaces.
speed
Sets the port speed for a Fast Ethernet interface.