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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-14209-01
Chapter 6 Configuring Radio Settings
Configuring Radio Channel Settings
This example shows how to prevent the access point from selecting frequencies 5.150 to 5.350 GHz
during DFS:
ap(config-if)# dfs band 1 2 block
This example shows how to unblock frequencies 5.150 to 5.350 for DFS:
ap(config-if)# no dfs band 1 2 block
This example shows how to unblock all frequencies for DFS:
ap(config-if)# no dfs band block
Setting the 802.11n Guard Interval
The 802.11n guard interval is the period in nanoseconds between packets. Two settings are available:
short (400ns) and long (800ns).
Beginning in privileged EXEC mode, follow these steps to set the 802.11n guard interval.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface dot11radio {0 | 1} Enter interface configuration mode for the radio interface.
The 802.11n 2.4-GHz radio is radio 0
The 802.11n 5-GHz radio is radio 1.
Step 3
guard-interval {any | long} Enter a guard interval.
• any allows either the short (400ns) or long (800ns) guard
interval.
• long allows only the long (800ns) guard interval.
Step 4
end Return to privileged EXEC mode.
Step 5
copy running-config
startup-config
(Optional) Save your entries in the configuration file.
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