Cisco Aironet 1100 Series - Configuring Radio Channel Settings

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Cisco Aironet 1100 Series Access Point Installation and Configuration Guide
OL-2851-01
Chapter 7 Configuring Radio Settings
Configuring Radio Channel Settings
Configuring Radio Channel Settings
The factory setting for Cisco wireless LAN systems is Radio Channel 6 transmitting at 2437 MHz. To
overcome an interference problem, other channel settings are available. The channel settings on your
access point correspond to the frequencies available in your regulatory domain. See Appendix C,
“Channels and Antenna Settings,” for the frequencies allowed in your domain.
Each channel covers 22 MHz. The bandwidth for channels 1, 6, and 11 does not overlap, so you can set
up multiple access points in the same vicinity without causing interference.
Note Too many access points in the same vicinity creates radio congestion that can reduce throughput. A
careful site survey can determine the best placement of access points for maximum radio coverage and
throughput.
Rather than setting a static default channel, you can configure the access point to select the
least-congested channel each time it boots. For most consistent performance after a site survey, however,
we recomend that you assign a static channel setting for each access point.
Beginning in privileged EXEC mode, follow these steps to set the access point’s radio network role and
fallback role:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface dot11radio 0 Enter interface configuration mode for the radio interface.
Step 3
channel
frequency | least-congested
Set the default channel for the access point radio. To search for the
least-congested channel on startup, enter least-congested.
These are the available frequencies (in MHz):
• channel 1—2412 (Americas, EMEA, Japan, and China)
• channel 2—2417 (Americas, EMEA, Japan, and China)
• channel 3—2422 (Americas, EMEA, Japan, Israel, and China)
• channel 4—2427 (Americas, EMEA, Japan, Israel, and China)
• channel 5—2432 (Americas, EMEA, Japan, Israel, and China)
• channel 6—2437 (Americas, EMEA, Japan, Israel, and China)
• channel 7—2442 (Americas, EMEA, Japan, Israel, and China)
• channel 8—2447 (Americas, EMEA, Japan, Israel, and China)
• channel 9—2452 (Americas, EMEA, Japan, Israel, and China)
• channel 10—2457 (Americas, EMEA, Japan, and China)
• channel 11—2462 (Americas, EMEA, Japan, and China)
• channel 12—2467 (EMEA and Japan only)
• channel 13—2472 (EMEA and Japan only)
• channel 14—2484 (Japan only)
Note The frequencies allowed in your regulatory domain might
differ from the frequencies listed here.