For traffic to be generated on the graphics, it is necessary to leave all IPv4 or IPv6 interfaces as monitored.
To do this, simply go to the options bar in the left corner and select the Routers option:
Within routers, select the editing pencil on the registered Router to verify the interfaces loaded on it:
Finally, just go to the bottom of the screen and leave the interfaces as ON:
Once this is done, the interfaces will be monitored, causing traffic to be generated on the graphics.
See also our video tutorial: