Cisco’s 15.3JF train was a long-lived release for 802.11n access points. JF15 is the fifteenth maintenance deployment, incorporating cumulative bug fixes and security patches. Key enhancements in JF15 over earlier JF releases include:
Disable 802.11r if you have mixed OS clients. JF15 has a bug with non-Apple devices. ap3g1-k9w7-tar.153-3.jf15.tar