4) Routers 0.1.3... send an (ACK) to the controller after the task is executed;

5) The SDN controller identifies the lit ports and turns off the others;

6) All routers apply the change to the forward tables for redirection by other ports;

7) Nodes 0, 1, 2... stop sending IGP packets;

8) Ports (0 - 1, 2 - 5...) stop and enter sleep mode to be turned off;