This read-write CmControlProtocolDispType sets how the device disposes of frames matching a flow's CPD filter entry, such as passing, dropping, or tunneling them. An admin needs to configure this correctly because control-protocol frames like BPDUs or CDP that leak across a customer-facing flow can trigger spanning-tree topology changes or leak internal network information if not filtered appropriately. For example, on a flow carrying a business Ethernet service, an admin might set cmFlowCpdDispType to drop for a filter row matching CDP so the customer's switch never sees the carrier's discovery frames.