Resolved! WLC 17.12.3 needs APSP 17.9.4?
Upgrading a WLC to version 17.12.3 but failed, needs a APSP from 17.9.4? Improper State./bootflash/C9800-CL-universalk9.17.09.04.CSCwh64998.SPA.apsp.bin not present. After providing the file installing was succesfull but just for me to know why we ne...