Cisco 3925 User Manual

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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Configuring Radio Settings
Configuring Dual-Radio Fallback
Configuring Dual-Radio Fallback
The dual-radio fallback feature, see Figure 1, 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 1 Dual-Radio Fallback
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. If 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
Access point
Fast Ethernet
11 a Root
bridge mode
11 b/g root
access point
mode
11 a Root bridge
mode
11 a non-root
bridge mode
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Access point
Clients
Access point

Cisco 3925 Specifications

General

Product Type	Router
Form Factor	Rack-mountable
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Connectivity Technology	Wired
Power	AC 120/230 V (50/60 Hz)
Redundant Power Supply	Optional
Routing Protocol	OSPF, IS-IS, BGP, EIGRP, PIM
Network/Transport Protocol	IPSec
Remote Management Protocol	SNMP, Telnet, SSH, HTTP
Encryption Algorithm	DES, Triple DES, AES
Flash Memory	256 MB
Weight	11.5 kg
Interfaces	2 x SFP (mini-GBIC)
Power Source	Internal power supply
Authentication Method	RADIUS, TACACS+, LDAP
Compliant Standards	IEEE 802.1Q, IEEE 802.3af
Operating Temperature	0 to 40 °C
Operating Humidity	5% to 85% (non-condensing)
Dimensions (WxDxH)	44.5 x 47.2 x 8.9 cm