Use the unconfig FMRI subcommand to reset the properties of an SMF naming service back to their default values. For example, to revert the changes to the SMF configuration in the previous section, you would type:
$ svcadm disable dns/client $ /usr/sbin/nscfg unconfig dns/client $ /usr/sbin/nscfg unconfig name-service/switch $ svcadm refresh name-service/switch $ svcadm refresh name-service/cache