Cisco IOS Software Configuration Guide for Cisco Aironet Access ...

Configuring Dual-Radio Fallback
Chapter 6
Configuring Radio Settings
Configuring Dual-Radio Fallback
The dual-radio fallback features allows you to configure access points so that if the non-root bridge link
connecting the access point to the network infrastructure goes down, the root access point link through
which a client connects to the access point shut down. Shutting down the root access point link causes
the client to roam to another access point. Without this feature, the client remains connected to the access
point, but won’t be able to send or receive data from the network.
Figure 6-1
Dual-Radio Fallback
Fast Ethernet
Access point
11 a Root bridge
mode
Access point
11 a non-root
bridge mode
11 a Root
bridge mode
11 b/g root
access point
mode
Access point
Clients
146930
Note This feature is supported by the dual-radio access points such as AP1240, AP1230, and AP 1130.
Note
This feature does not affect the fallback feature for single-radio access points.
You can configure dual-radio fallback in three ways:
• Radio tracking
• Fast Ethernet tracking
• MAC-address tracking
Radio Tracking
You can configure the access point to track or monitor the status of one of its radios. It the tracked radio
goes down or is disabled, the access point shuts down the other radio. If the tracked radio comes up, the
access point enables the other radio.
• To track radio 0, enter the following command:
# station-role root access-point fallback track d0 shutdown
• To track radio 1, enter the following command:
# station-role root access-point fallback track d1 shutdown
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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-8191-01