By default, an IP interface is plumbed and becomes part of the active configuration when you create the interface by using the ipadm create-ip command. The interface is flagged as UP when the first address is created on the interface.
To remove an interface from active configuration without destroying the configuration, use the disable-if subcommand as follows. This subcommand unplumbs the interface in the kernel.
# ipadm disable-if -t interface
You would make an IP interface operational and its flag displayed as UP as follows:
# ipadm enable-if -t interface