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Command Reference Guide
AP Interface Command Set
half-duplex
Use the half-duplex command to configure the wireless access point's (AP) Ethernet interface for
half-duplex operation. This setting allows the Ethernet interface to either send or receive at any given
moment, but not simultaneously. Use the no form of this command to disable half-duplex operation.
This command is not available for the embedded access point module (EAPM).
Syntax Description
No subcommands.
Default Values
By default, all Ethernet interfaces are configured for half-duplex operation.
Command History
Release 15.1
Command was introduced for the AP interface.
Functional Notes
Half-duplex Ethernet is the traditional form of Ethernet that employs the carrier sense multiple
access/collision detect (CSMA/CD) protocol to allow two or more hosts to share a common transmission
medium while providing mechanisms to avoid collisions. A host on a half-duplex link must listen on the link,
and only transmit when there is an idle period. Packets transmitted on the link are broadcast (so it will be
heard by all hosts on the network). In the event of a collision (two hosts transmitting at once), a message is
sent to inform all hosts of the collision and a backoff algorithm is implemented. The backoff algorithm
requires the station to remain silent for a random period of time before attempting another transmission.
This sequence is repeated until a successful data transmission occurs.
Usage Examples
The following example configures the AP Ethernet interface for half-duplex operation:
(config)#interface dot11ap 1
(config-dot11ap 1)#half-duplex
60000CRG0-35E
Copyright © 2012 ADTRAN, Inc.
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