{ "access": "write", "avail": "1.5.0", "brief": [ "This command adds a new class to the existing server configuration." ], "cmd-comment": [ "The ``next-server``, ``server-hostname``, and ``boot-file-name`` are DHCPv4-specific. Only one client class can be added with a single command. " ], "cmd-syntax": [ "{", " \"command\": \"class-add\",", " \"arguments\": {", " \"client-classes\": [ {", " \"name\": ,", " \"test\": ,", " \"option-data\": [