: This "platform designator" identifies compatibility with second-generation 802.11ac hardware, specifically the Cisco Aironet 1700 , 2700 , and 3700 series.
is the filename for a Cisco IOS software image used to run Cisco Aironet Access Points in autonomous mode . Breakdown of the Filename Ap3g2-k9w7-tar.153-3.jf15.tar
: Often, this is caused by the OS firewall (Windows 8/10/11) blocking UDP port 69. Switching to a Windows 7 machine or explicitly allowing the port in the firewall often fixes it. specifically the Cisco Aironet 1700