This report describes progress made during the third six months of a contract to make several improvements to ARPANET routing. During this period all aspects of the ARPANET's new routing algorithm were implemented and the new algorithm was run through an extensive series of tests. The results of these tests are presented, along with a discussion of our testing goals, techniques, and tools. A full description of the procedures needed to handle a dynamically changing topological data base is also presented. Measurements on the performance of the ARPANET's new line up/down protocol are presented. Lastly, the procedures used in the ARPANET for managing buffer space are described.