Check the Cisco Bug Toolkit for CSCvx12345 (related to 153-3.JBB1 and DHCP timeouts) or consult the Release Notes for Cisco IOS Release 15.3(3)JBB1 .
Place this renamed file in your TFTP server's root directory. Ensure your firewall allows UDP port 69 . Ap3g2-k9w7-tar.153-3.jbb1.tar WORK
To guarantee success:
The AP will install the image and reload automatically. Default Credentials & Access Check the Cisco Bug Toolkit for CSCvx12345 (related to 153-3