It looks like it's large putback time at the moment: The outcome of the Project Brussels II found it's integration into the codebase yesterday. So ipadm is the new ifconfig:
The ipadm command provides a set of subcommands that can be used to manage interfaces(interface creation and deletion, modifying interface properties and displaying interface configuration), manage addresses (address creation and deletion, modifying address properties and displaying address configuration) and manage TCP/IP protocol properties (modifying and displaying them).
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