The port identified by vlanMemberPortIndex becomes a member of the VLAN identified by vlanMemberIndex when this object is set to true(1). The same port ceases to be member of that VLAN when the object is set to false(2). All ports in the switch must belong to some VLAN. Consequently, the switch will return badValue if this object is used such to remove the port from all membership lists. Note that when vlanAllowMembershipOverlap is disabled, a port can only be member of exactly one VLAN. In this case, setting vlanMemberPortOfVlan to true(1) for a port adds the port to the membership list of the current VLAN and removes the same port from all other VLAN membership lists. When vlanAllowMembershipOverlap is enabled, a port may reside in multiple VLANs. Setting vlanMemberPortOfVlan to true(1) in this case adds the port to the membership list of the current VLAN and does not change other VLAN membership lists.