1.3.3.1.4 Shutdown Phase
The shutdown phase is used to terminate the UDP channel and end the connection between the RDG client and the RDG server. To tear down the channel and terminate the connection, either the RDG client or the RDG server sends the DISC_PKT Structure (section 2.2.11.6) packet to the other party.

Figure 12: Message sequence between the RDG client and RDG server during shutdown phase