BGP (Border Gateway Protocol) manages redundancies by selecting the best path to route traffic based on a set of defined criteria. These criteria include the shortest path to the destination, the highest bandwidth, and the lowest cost.
BGP can also manage redundancies by using multiple paths to the same destination. This is achieved by using multiple routers or ISPs that share routes to provide redundancy and avoid any single point of failure.
BGP employs several techniques to manage redundancies, some of which include:
1. AS (Autonomous System) Path Prepending: This is a technique used to influence the selection of the path by adding additional AS numbers to the path, to make it appear longer than other available paths.
1. Local Preference: This is a BGP attribute that is used to indicate the preferred path for outbound traffic, it is also used to select the best path among multiple paths.
1. Multi-homed routing: This is a setup where a network is connected to multiple routers or ISPs, to provide redundancy and avoid any single point of failure.
Overall, BGP’s ability to manage redundancies plays an essential role in ensuring network availability and reliability.
