This object is responsible for managing the creation and deletion of rows, which supports 'active', 'notReady', 'createAndGo', 'destroy'. Until instances of all corresponding columns are appropriately configured, the value of the corresponding instance of the h3cMPortGroupJoinStatus column is 'notReady'. In particular, a newly created row cannot be actived until the port belongs to the corresponding VLAN and IGMP or IGMP snooping is enabled on that VLAN.