This object contains the value to be used for
cpwCTDMCfgIndex when creating entries in the
cpwCTDMCfgTable. The value 0 indicates that no
unassigned entries are available. To obtain the
value of cpwCTDMCfgIndexNext for a new entry in the
cpwCTDMCfgTable, the manager issues a management
protocol retrieval operation. The agent will
determine through its local policy when this
index value will be made available for reuse.