Towards a Redundant Internetwork Structure of Exterior and Interior Border Gateway Protocol (BGP) Sessions in an Enterprise Network

A critical consideration of contemporary enterprises is a scalable and redundant end-to-end private network connection between the main campus in Manila and Taguig City. There are several options, but the research will concentrate on how widely the technology is accessible in most places. Internet is a common network connectivity that connects the company's main site to its various divisions. It is affordable to connect businesses attributable to the Internet's extensive accessibility and compatibility. The study was conducted at a state university in the Philippines, which needs to improve its network infrastructure regarding redundancy fault tolerance. The critical demand is to connect a remote campus with the main office for file and application sharing when the main link goes down. The State University's campuses in Metro Manila use the ISP router in AS 200 to externally execute BGP on their Manila and Taguig routers. IBGP is operated internally between the campuses in Manila and Taguig. The primary intention is to set up both EBGP (External Border Gateway Protocol) and IBGP (Internal Border Gateway Protocol) configurations within the internetwork to establish redundancy. Importantly, the metered connection should only be utilized as a backup option when the primary link has experienced a failure. This approach aims to ensure uninterrupted network connectivity while optimizing cost-efficiency by relying solely on the metered connection as a fallback measure when necessary. To prevent this link from being utilized excessively, traffic delivered through the metered link gives the same bandwidth as the principal link at a significant cost.