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Chapter 2
Configuring Radio Settings
Beginning in privileged EXEC mode, follow these steps to enable world mode:
Command
Step 1
configure terminal
Step 2
interface dot11radio { 0 | 1}
Step 3
world-mode
dot11d country_code code
{ both | indoor | outdoor }
| legacy
Step 4
end
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
Use the no form of the command to disable world mode.
Enabling and Disabling Short Radio Preambles
The radio preamble (sometimes called a header) is a section of data at the head of a packet that contains
information that the wireless device and client devices need when sending and receiving packets. You
can set the radio preamble to long or short:
•
•
You cannot configure short or long radio preambles on the 5-GHz radio.
Beginning in privileged EXEC mode, follow these steps to disable short radio preambles:
Command
Step 1
configure terminal
Step 2
interface dot11radio { 0 }
OL-6415-04
Short—A short preamble improves throughput performance. Cisco Access Point Wireless LAN
Client Adapters support short preambles.
Long—A long preamble ensures compatibility between the wireless device and all early models of
Cisco Access Point Wireless LAN Adapters (PC4800 and PC4800A). If these client devices do not
associate to the wireless devices, you should use short preambles.
Enabling and Disabling Short Radio Preambles
Purpose
Enter global configuration mode.
Enter interface configuration mode for the radio interface.
Enable world mode.
Enter the dot11d option to enable 802.11d world mode.
•
When you enter the dot11d option, you must enter a
–
two-character ISO country code (for example, the ISO
country code for the United States is US). You can find
a list of ISO country codes at the ISO website.
–
After the country code, you must enter indoor,
outdoor, or both to indicate the placement of the
wireless device.
Enter the legacy option to enable Cisco legacy world
•
mode.
Access Point extensions must be enabled for legacy
Note
world mode operation, but Access Point extensions are
not required for 802.11d world mode. Access Point
extensions are enabled by default.
Return to privileged EXEC mode.
Purpose
Enter global configuration mode.
Enter interface configuration mode for the 2.4-GHz radio
interface.
Cisco Wireless ISR and HWIC Access Point Configuration Guide
2-21
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