Factor Influencing the Convergence Time in Border Gateway Protocol (BGP)

Abstract

Border Gateway Protocol (BGP) is the protocol which helps to route the traffic over the internet, it also helps to interchange reachability and routing information between diverse Autonomous systems (AS). The major operations of Border gateway Protocol (BGP) takes place at transport layer. When BGP works with TCP it removes the need for acknowledgement, sequence number. The major problem which occurs over the network is due to delay during the process of path selection and due to change in routing table [2]. This degradation convergence and delay can occur due to defined policy in between the peers of network. BGP performance can be improved by implementing different techniques such as MD5 Authentication, 16 bits Autonomous system, 32 bits Autonomous system, Classless Inter Domain Routing (CIDR), IPSec over BGP and consistency assertions. In this paper we have used CIDR technique to enhance BGP performance as well as we have focused on identifying and calculating affects on convergence time of BGP protocol due to the variation in the number of nodes and complex topology design. We have designed simulation based topology over OpNet, to analyze the impact of convergence time of BGP. Simulation results show that we can minimize the convergence time due to link failure.