Specifications

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Cisco IOS Command Reference for Cisco Aironet Access Points and Bridges
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Chapter 2 Cisco IOS Commands for Access Points and Bridges
speed (radio interface)
Usage Guidelines Cisco recommends that you use auto, the default setting, for both the speed and duplex settings on the
Ethernet port.
When the access point or bridge receives inline power from a switch, any change in the speed or duplex
settings that resets the Ethernet link reboots the unit.
Note The speed and duplex settings on the wireless device Ethernet port must match the Ethernet settings on
the port to which the wireless device is connected. If you change the settings on the port to which the
wireless device is connected, change the settings on the wireless device Ethernet port to match.
Examples This example shows how to configure the Ethernet port for auto duplex:
AP(config-if)# speed auto
Related Commands
speed (radio interface)
Use the speed configuration interface command to configure the data rates supported by the access point
radios. An individual data rate can be set only to a basic or a non-basic setting, not both. Use the no form
of the command to remove one or more data rates from the configuration.
This command now includes Modulation Coding Scheme (MCS) settings for 2.4-GHz and 5-GHz
802.11n radios. MCS is a specification of PHY parameters consisting of modulation order (BPSK,
QPSK, 16-QAM, 64-QAM) and FEC code rate (1/2, 2/3, 3/4, 5/6). MCS is used in the 1250 series
802.11n radios, which define 32 symmetrical settings (8 per spatial stream):
• MCS 0–7
• MCS 8–15
• MCS 16–23
• MCS 24–31
The 1250 series access point supports MCS 0–15. High throughput clients support at least MCS 0–7.
MCS is an important setting because it provides for potentially greater throughput. High throughput data
rates are a function of MCS, bandwidth, and guard interval.
Command Description
duplex Configures the duplex setting for the Ethernet port