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 ofdm
speed ofdm
Use the speed ofdm configuration interface command to adjust the way that the access point advertises
supported OFDM data rates in beacons and probe responses. Use the no form of the command to return
to the default setting.
[no] speed ofdm {join | separate}
Syntax Description
Defaults By default, supported OFDM data rates are listed in beacons and probe responses in both IE 1 and in
IE
50.
Command Modes Interface configuration mode
Command History
Usage Guidelines By default, access points are configured with the speed ofdm join command and advertise supported
data rates in ascending order in both IE 1 and in IE 50 in beacons and probe responses:
IE 1: 1, 2, 5.5, 6, 9, 11, 12, 18
IE 50: 24, 36, 48, 54
However, some legacy 802.11b client devices cannot properly interpret the OFDM data rates in IE 1 and
either associate at a data rate below 11 Mps or do not associate at all. To improve performance for these
clients, you can use the speed
ofdm separate command to list only 802.11b data rates in IE 1 and
OFDM data rates in IE 50:
IE 1: 1, 2, 5.5, 11
IE 50: 6, 9, 12, 18, 24, 36, 48, 54
Examples This example shows how to configure the access point to advertise only 802.11b data rates in IE 1 in
beacons and probe responses:
AP(config-if)# speed ofdm separate
Related Commands
join Specifies that supported OFDM data rates appear in both information
element (IE) 1 and IE
50. This is the default setting.
separate Specifies that supported OFDM data rates appear only in IE 50.
Release Modification
12.3(2)JA This command was introduced.
Command Description
speed (radio interface) Configures the supported data rates on access point radio
interfaces