Thispaperfocusesontheauthors'contributionstoITU-TtodevelopthenetworkmodelingforthesupportofIN/Internetinterworking.Followinganintroductiontobenchmarkinterworkingservices,thepaperdescribestheconsensusenhancedDFParchitecture,whichisreachedbasedonIETFreferencemodelandtheauthors'proposal.Thentheproposedinformationflowsforbenchmarkservicesarepresentedwithneworupdatedflowsidentified.Finallyabriefdescriptionisgiventoimplementationtechniques.