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Chapter 6
Configuring Radio Settings
Configuring the Radio Distance Setting
Use the distance command to specify the distance from a root bridge to the non-root bridges with which
it communicates. The distance setting adjusts the bridge's timeout values to account for the time required
for radio signals to travel from bridge to bridge. If more than one non-root bridge communicates with
the root bridge, enter the distance from the root bridge to the non-root bridge that is farthest away. Enter
a value from 0 to 99 km. You do not need to adjust this setting on non-root bridges.
In installation mode, the default distance setting is 99 km. In other modes, the default distance setting is
0 km.
Beginning in privileged EXEC mode, follow these steps to configure the bridge distance setting:
Command
Step 1
configure terminal
Step 2
interface dot11radio 0
Step 3
distance kilometers
Step 4
end
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
Use the no form of the distance command to return to the default distance setting.
Configuring Radio Data Rates
You use the data rate settings to choose the data rates the bridge uses for data transmission. The rates are
expressed in megabits per second. The bridge always attempts to transmit at the highest data rate set to
Basic, also called Require on the browser-based interface. If there are obstacles or interference, the
bridge steps down to the highest rate that allows data transmission. You can set each data rate to one of
three states:
•
•
•
Note
At least one data rate must be set to basic.
You can use the Data Rate settings to set up the bridge to operate at specific data rates. For example, to
configure the bridge to operate at 54 megabits per second (Mbps) service only, set the 54-Mbps rate to
Basic and set the other data rates to Enabled. To set up the bridge to operate at 24, 48, and 54 Mbps, set
24, 48, and 54 to Basic and set the rest of the data rates to Enabled.
You can also configure the bridge to set the data rates automatically to optimize either range or
throughput. When you enter range for the data rate setting, the bridge sets the 6-Mbps rate to basic and
the other rates to enabled. When you enter throughput for the data rate setting, the bridge sets all data
rates to basic.
OL-4059-01
Basic (this is the default state for all data rates)—Allows transmission at this rate for all packets,
both unicast and multicast. At least one of the bridge's data rates must be set to Basic.
Enabled—The bridge transmits only unicast packets at this rate; multicast packets are sent at one of
the data rates set to Basic.
Disabled—The bridge does not transmit data at this rate.
Purpose
Enter global configuration mode.
Enter interface configuration mode for the radio interface.
Enter a distance setting from 0 to 99 km.
Return to privileged EXEC mode.
Cisco Aironet 1400 Series Wireless Bridges Software Configuration Guide
Configuring the Radio Distance Setting
6-3
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