Convergence Time Analysis of Border Gateway Protocol Using GNS3

Border Gateway Protocol is a path vector protocol. BGP is commonly used by Internet Service Providers. This protocol is considered as exterior protocol. BGP connects different Autonomous System via the internet. As the global internet traffic is rising with the increase in web applications. Most of these applications impact by delay. One of the delay sources over the internet which caused by the BGP routing protocol. BGP delay comes from the convergence time. This paper demonstrates an analysis of BGP convergence time and BGP timers or intervals. This paper analysis BGP convergence based on keepalive and hold timers. In addition, the paper considers the most important interval of route advertisement and update delay. Moreover, the paper takes into account link events such as failover and link failure mechanisms. The simulation result shows that the keepalive should be greater than 10 seconds. Furthermore, the optimum value of route advertisement should be between 30 to 60 seconds. Finally, paper results show that the delay of link failure detection based on the keepalive of BGP increases the convergence delay of the BGP system.