Link State IGP Protocols Comparison for Routing Planning in Distributed Telecommunications Infrastructures

Abstract

One of the stages of designing distributed telecommunication infrastructures within autonomous systems is the choice of an internal routing protocol to organize traffic exchange between remote network segments. An example of such networks can be telecommunication infrastructures of telecom operators and large companies of various directions, including a large number of routing nodes, networks connected to them, and operating within one or more autonomous systems. As modern experience shows, a prerequisite for the development of such organizations is the appropriate scaling of the telecommunications infrastructure in terms of the number of routing nodes and networks, communication channels and traffic volumes generated by an increasing number of clients and new network services. In this regard, the preventive choice of the routing protocol in accordance with the future development of the organization is an extremely responsible step. That is why it is necessary to imagine the architecture and functionality of routing protocols for their comparison and positioning for each specific case. This article discusses the Link State IGP internal routing protocols and ignores the remote vector RIP protocol due to its significant limitations in scaling the telecommunications infrastructure and the relatively high overhead of using the bandwidth of communication channels. Protocols can be compared according to many criteria, but not all of them are significant when proactively choosing a routing protocol during the network design phase. Therefore, the article will consider the characteristics of Link State routing protocols, which from the author's point of view must be taken into account from the very beginning.