Description: BGP (Border Gateway Protocol) is the main dynamic routing protocol used across the Internet. Routers that use BGP, exchange information about reachable networks along with various attributes of the networks, which BGP uses to select the best path and set routing policies.
BGP (Border Gateway Protocol) is the main dynamic routing protocol used across the Internet. Routers that use BGP protocol, exchange information about reachable networks. Along with information about networks, various attributes of the networks are passed, which BGP uses to select the best path and set routing policies. One of the main attributes sent along with the information about the route is the list of autonomous systems transited by this information. It allows BGP to determine where is the network l
Routing is carried out step by step, from one autonomous system to another. All BGP policies are set mostly relative to external/neighboring autonomous systems, that is: describe the interaction rules with them. So as BGP operates with large volumes of data (the current size of the table for IPv4 routes is more than 580,000 routes), the principles of its configuration and operation differ from the internal dynamic routing protocol (IGP).
Interior Gateway Protocol – the protocol used to exchange routing information within an autonomous system. Exterior Routing Protocol – the protocol used to transfer exchange information between autonomous systems. Autonomous System (AS) – a set of routers with common routing rules, managed by one technical administrator and working with an IGP protocol (for routing within an AS, several IGP protocols can also be used). Transit autonomous system (transit AS) – autonomous system, through which traffic is sent