A NIM master can be unconfigured using the script /usr/lpp/bos.sysmgt/nim/methods/m_unconfig. This script stops the nimesis subsystem and removes all created NIM objects. The script must be called with at least the argument “master“:

aixnim # /usr/lpp/bos.sysmgt/nim/methods/m_unconfig master
0513-044 The nimesis Subsystem was requested to stop.
0513-004 The Subsystem or Group, nimd, is currently inoperative.
0513-004 The Subsystem or Group, nimsh, is currently inoperative.
0513-083 Subsystem has been Deleted.
0513-083 Subsystem has been Deleted.
0518-307 odmdelete: 5 objects deleted.
0518-307 odmdelete: 39 objects deleted.
aixnim # 

Note: After unconfiguring the NIM master, the bos.sysmgt.nim.master fileset can also be removed.

The script supports three options (“-a“, “-q“, and “-v“). The “-v” (verbose) option can be used to generate debugging output. This can be useful in case of problems. The “-q” (query) option can be used to display all available attributes:

aixnim # /usr/lpp/bos.sysmgt/nim/methods/m_unconfig -q

no required attrs

optional attrs are:
        stop_nimsh

aixnim # 

The only supported attribute is stop_nimsh. If specified with the third option “-a,” any running NIM service handler will also be terminated.