Performance Analysis of Two Inter-Domain Routing Protocols: BGP and HLP Using Taylor Series

Inter-domain routing protocol routes network reachability information between autonomous systems (ASs) in the network. Network reachability information contains the details about the neighbors of the ASs and it contains messages used to maintain the connection between ASs. On one hand, given the size and the rapid growth of the Internet, any inter-domain routing protocol should satisfy basic desirable algorithmic properties, such as scalability, robustness and rapid convergence by Griffin, T., and Wilford, G. 1999. On the other hand, for economic reasons inter-domain routing should support policy routing, where Internet service providers (ISPs) have the flexibility to implement a wide variety of private routing policies that ISPs choose not to reveal. Moreover, the routing protocol should provide sufficient information to enable ISPs to make informed policy decisions. Border gateway protocol (BGP) by Goodell, G. et al. (2003) is the inter-domain routing protocol that is currently being used. BGP has a number of problems which includes scalability and large convergence time by Labovitz, C et al. (2000). This paper explains in detail the alternative to BGP which is the hybrid optimized link-state path-vector routing protocol (HLP) [1] and gives a comparison based on the simulation of these protocols. The comparison shows us that HLP overcomes some of the important problems faced in BGP.