This read-write INTEGER controls whether interfaces are pulled from the unallocated interface pool into a VDC, and always reads back as noOp(1) regardless of the value last set. Setting it to allocate(2) tells the switch to assign free interfaces to that VDC on a best-efforts basis, which an admin would use when expanding a VDC's port count without manually picking each interface. An admin who sets this to allocate(2) to grab a few open ports for a growing VDC will see the object read back as noOp(1) afterward, since the action itself is not a persistent state.