A read-write enumerated value controlling the row status of a group membership entry, enabled via active and removed via destroy, with notReady, notInService, and createAndGo noted as unsupported. Adding a membership entry here automatically updates the group name shown in the corresponding cmIfaceTable entry, so an admin uses this table as the actual place to manage which group an interface belongs to. An admin moving an interface into a new group would add an entry to the cmMemberTable and set cmMemberRowStatus to active, expecting the interface's group name in cmIfaceTable to update automatically as a result.