This read-write object configures the disposition of frames addressed to the reserved multicast MAC 01:80:C2:00:00:0C on the flow point governed by this CPD profile. Since that address is one of the bridge-reserved control destinations, the setting decides whether the local node terminates, discards, or transparently tunnels frames sent to it. As an example, when building a flow point for an Ethernet private line that must carry the customer's own spanning-tree-adjacent protocols end to end, the engineer would set this disposition to tunnel.