A Study On Edge-based Traffic Engineer Solutions For Current OSPF Networks

With the fast development of the Internet, people need a more efficient network. Kinds of new services such as large amount data transfer, video conference, visible telephone need the network to provide a mechanism to anticipate the data transfer process as well as to provide reliability on data transfer. So, people pay more attention on Transfer Engineer. Traditional Routing protocol don't have the ability to control data transfer precisely, the research on TE nowadays mainly combine with the technical of MPLS, and have got great success.OSPF is the most widely used and the most mature inner gateway routing protocol in current network. In the network runs protocols like OSPF or IS-IS, we use the shortest path to routing data, we don't take the load of links into consideration. These restraints make it difficult to optimize the traffic distribution and to implement Traffic Engineer. To large-scale network especially the backbone network, the Service Provider hopes to control the load of traffic reasonably as to use the network resource with high efficiency and to improve the network performance. Meanwhile, the SP will protect their investment, so there must be a method that can satisfied the need of Traffic Engineer without change the infrastructure of network already built.In this article we first analyze the protocol OSPF thoroughly, then with the most recent development of TE, we propose and evaluate an approach that can realize near optimal traffic distribution without changes to routing protocols and forwarding mechanisms. This article proposes and evaluates a novel, edge-based approach, which we call the k-set Traffic Engineering (TE) method, to perform traffic engineering in OSPF networks by partitioning...