BGP (Core)

What is BGP? BGP (Border Gateway Protocol) is the protocol used to exchange routing information between different networks on the Internet. It's often referred to as the "backbone of the Internet" because it ensures data can travel across various Autonomous Systems (AS), which are networks managed by different organizations or providers. Key Details: Type: Exterior Gateway Protocol (EGP). Purpose: To find the best path for data to travel across multiple networks. Operation: BGP uses a path-vector mechanism to advertise routes and maintain a table of IP networks or prefixes. How BGP Works: Establishes Peer Connections: BGP routers (neighbors/peers) exchange routing information. Advertises Routes: Each router shares information about the networks it knows how to reach. Selects the Best Path: BGP uses attributes like AS Path, Next-Hop, and policies to determine the optimal route. Applications: ISPs and Data Centers: Used to connect large networks and manage traffic. Load Balancing: Helps in traffic optimization. Multi-Homing: Ensures redundancy by connecting to multiple providers. Why BGP is Important: BGP ensures that the Internet is scalable, reliable, and able to handle millions of interconnected networks efficiently. Would you like to dive deeper into BGP attributes, troubleshooting, or configuration? Let me know!

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• Created: Anwar Alam Sir
• Last Updated: 23rd January 2025
• Hindi