OPTIMIZING NETWORK CONVERGENCE OF ISP BY TUNING ROUTING PROTOCOLS

To ensure L3 network performance accurate & precise routing table entries need to be exchanged between ISPs and client organizations. But most of the cases it is not the scenario. The client organization may tend to send irrelevant subnet updates towards ISP. Some clients need whole Internet routes, some need updates about specific network(s), and some don’t need any routes at all. Inappropriate routing updates if exchanged among ISPs and between ISPs & their clients will impact routing convergence. Subsequently the inconsistent routing information triggers intermittent L3 updates, sub-optimal routing within AS, route flopping, routing loops and un-sized routing tables which in turn degrades the performance of both ISP as well as client networks. We propose to validate the route updates received by ISPs from clients before forwarding them to Internet. We propose to filter and forward only relevant routing information and to alter some specific parts of routing information before exchanging with client networks and other ISPs. Here the manipulation proposed to improve network convergence by controlling and tuning L3 updates by deploying a scalable solution using a combination of techniques namely distribute lists, route maps, metrics manipulation and outbound route filtering.