AIR-CAP17021-E-K9

[ahorgahevans]

I have AIR-CAP17021-E-K9 which was working using WLC but the WLC is faulty and I want to configure it using console cable 

when I login I could not have access to config t command to enable me assign the necessary IP to it for it to function.

[Mark Elsen]

 - If the AP has been working as a client (attached to a controller) , then you need to convert it to standalone first for it to be operative on it's own.

 M.

[Rich R]

 Like Marce says you would need to convert the AP to autonomous mode first.
Search "cisco ap convert to autonomous" for numerous guides, articles, blogs and videos on how to do that.
You will need the autonomous IOS software to install:
https://software.cisco.com/download/home/286281141/type/284180979/release/15.3.3-JPQ
The autonomous IOS web interface has a number of known bugs which will never be fixed because it's almost end of support (in a few months time) so highly recommend you use the CLI for the config.
https://www.cisco.com/c/en/us/td/docs/wireless/access_point/15-3-3/configuration/guide/cg15-3-3.html