IMPROVING INTERNET ROUTING INFORMATION PROTOCOL

We improve tile Internet Routing Information Protocol (RIP) in three a spects: dynamically measuring routing delays and costs (instead of usi ng fixed metrics); delaying installation of a new route when the route expires until the expired route is deleted to prevent potential routi ng loops (instead of using 16 as routing infinity); and actively inqui ring about routes when necessary (instead of passively listening for R IP messages). Results of our simulation implementation indicate that t he improved RIP is more efficient and responsive than the classical RI P. The proposed techniques can also be applied to general internet rou ting.