Network Border Protocol

Abstract

The fundamental philosophy behind the Internet is expressed by the scalability argument: no protocol, mechanism, or service should be introduced into the Internet if it does not scale well. A key corollary to the scalability argument is the end-to-end argument: to maintain scalability, algorithmic complexity should be pushed to the edges of the network whenever possible. Perhaps the best example of the Internet philosophy is TCP congestion control, which is implemented primarily through algorithms operating at end systems. Unfortunately, TCP congestion control also illustrates some of the shortcomings the end-to-end argument. As a result of its strict adherence to end-to-end congestion control, the current Internet suffers from main maladies: congestion collapse from undelivered packets. The Internet’s excellent scalability and robustness result in part from the end-to-end nature of Internet congestion control. End-to-end congestion control algorithms alone, however, are unable to prevent the congestion collapse and unfairness created by applications that are unresponsive to network congestion. To address these maladies, we propose and investigate a novel congestion-avoidance mechanism called network border patrol (NBP). NBP entails the exchange of feedback between routers at the borders of a network in order to detect and restrict unresponsive traffic flows before they enter the network, thereby preventing congestion within the network.

Existing System

 Packets are buffered in the routers present in the network which causes Congestion collapse from undelivered packets arises when bandwidth is continuously consumed by packets that are dropped before reaching their ultimate destinations.  Retransmission of undelivered packets is required to ensure no loss of data.  Unfair bandwidth allocation arises in the Internet due to the presence of undelivered packets.

Proposed System

 Buffering of packets in carried out in the edge routers rather than in the core routers .  The packets are sent into the network based on the capacity of the network and hence there is no possibility of any undelivered packets present in the network.  Absence of undelivered packets avoids overload due to retransmission.  Fair allocation of bandwidth is ensured.

Architecture