Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. BGP is classified as a See more

Message header format
• Marker: Included for compatibility, must be set to all ones.
• Length: Total length of the message in octets, … See more

The routing tables managed by a BGP implementation are adjusted continually to reflect actual changes in the network, such as links or routers … See more

The Border Gateway Protocol was sketched out in 1989 by engineers on the back of "three ketchup-stained napkins", and is still known as the three-napkin protocol. It was first … See more

BGP neighbors, called peers, are established by manual configuration among routers to create a TCP session on port 179. … See more

BGP is "the most scalable of all routing protocols."
An autonomous system with internal BGP (iBGP) must have all of its iBGP peers connect to each other in a full mesh (where everyone speaks to everyone directly). This full … See more

One of the largest problems faced by BGP, and indeed the Internet infrastructure as a whole, is the growth of the Internet routing table. If the global routing table grows to the point where some older, less capable routers cannot cope with the … See more