Convert an access point from lightweight mode back to autonomous mode

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http://www.cisco.com/en/US/docs/wireless/access_point/conversion/lwapp/upgrade/guide/lwapnote.html

You can convert an access point from lightweight mode back to autonomous mode by loading a Cisco IOS Release that supports autonomous mode. If the access point is associated to a controller, you can use the controller to load the Cisco IOS release. If the access point is not associated to a controller, you can load the Cisco IOS release using TFTP.

Note :  In some LWAPP deployments, the LWAPP controller resides between the access points and the rest of the network. In this topology, all traffic must cross over the controller before communication with network resources, such as a TFTP server, can occur. When converting back to non-LWAPP IOS with an access point that is no longer using the LWAPP protocol, traffic does not cross over the controller to reach the TFTP server.

Note    The lightweight 1300 series access points can only be converted back to autonomous mode using a wireless LAN controller.
Using a Wireless LAN Controller to Return to a Previous Release

Follow these steps to revert from LWAPP mode to autonomous mode using a wireless LAN controller:

Step 1    Log into the CLI on the controller to which the access point is associated.

Step 2    Enter this command:

config ap tftp-downgrade tftp-server-ip-address filename access-point-name
Using a TFTP Server to Return to a Previous Release

Note    This section does not apply to Cisco C3201WMIC and Cisco C3201LAP.
Follow these steps to revert from LWAPP mode to autonomous mode by loading a Cisco IOS release using a TFTP server:

Step 1    The static IP address of the PC on which your TFTP server software runs should be between 10.0.0.2 and 10.0.0.30.

Step 2    Make sure that the PC contains the access point image file (such as c1200-k9w7-tar.122-15.JA.tar for a 1200 series access point) in the TFTP server folder and that the TFTP server is activated.

Step 3    Set the timeout value on the TFTP server to 30 seconds.

Step 4    On the PC where the TFTP server is located, perform these steps:

a.    Disable any software firewall products, such as Windows firewall, ZoneAlarm firewall, McAffee firewall, or others.

b.    Ensure all Windows files are visible. From Windows Explorer, click Tools > Folder Options > View; then uncheck the Hide extensions for known file types check box.

Step 5    Rename the access point image file in the TFTP server folder to c1200-k9w7-tar.default for a 1200 series access point, c1130-k9w7-tar.default for an 1130 series access point, c1240-k9w7-tar.default for a 1240 series access point, and c1250-k9w7-tar.default for a 1250 series access point.

Step 6    Connect the PC to the access point using a Category 5 (CAT5) Ethernet cable.

Step 7    Disconnect power from the access point.

Step 8    Press and hold MODE while you reconnect power to the access point.

Step 9    Hold the MODE button until the status LED turns red (approximately 20 to 30 seconds) and then release.

Step 10    Wait until the access point reboots, as indicated by all LEDs turning green followed by the Status LED blinking green.

Step 11    After the access point reboots, reconfigure it using the GUI or the CLI.