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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-30644-01
Chapter 6 Configuring Radio Settings
Configuring Radio Data Rates
Since multicast frames are not retransmitted at the MAC layer, stations at the edge of the cell may fail
to receive them successfully. If reliable reception is a goal, then multicasts should be transmitted at a
low data rate. If support for high data rate multicasts is required, then it may be useful to shrink the cell
size and to disable all lower data rates.
Depending on your specific requirements, you can take the following action:
• If you need to transmit the multicast data with the greatest reliability and if there is no need for great
multicast bandwidth, then configure a single basic rate, one that is low enough to reach the edges of
the wireless cells.
• If you need to transmit the multicast data at a certain data rate in order to achieve a certain
throughput, then configure that rate as the highest basic rate. You can also set a lower basic rate for
coverage of non-multicast clients.
Beginning in privileged EXEC mode, follow these steps to configure the radio data rates:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface dot11radio {0 | 1slot/port} Enter interface configuration mode for the radio interface. The
2.4-GHz radio and 2.4-GHz N radio is radio 0, and the 5-GHz
radio and 5-GHz N radios radio 1.