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This article mainly introduces what bgp refers to, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

The full name of bgp is "Border Gateway Protocol", which refers to the Border Gateway Protocol, which is a routing protocol used to connect independent systems on Internet. It is a strengthened, perfect and scalable protocol developed by the Internet Engineering Task Force.

BGP (Border Gateway Protocol, Border Gateway Protocol) is a routing protocol used to connect independent systems on Internet. It is an enhanced, complete and scalable protocol developed by the Internet Engineering Task Force. BGP4 supports the CIDR addressing scheme, which increases the number of available IP addresses on the Internet. BGP is designed to replace the original external gateway protocol EGP. It is also considered to be a path vector protocol.

BGP is mainly used for the interconnection between Internet AS (autonomous systems). The main function of BGP is to control the propagation of routes and choose the best route. China Unicom, China Telecom, China TieTong and some large private IDC operators all have AS numbers. Most of the major network operators in China achieve multi-line interconnection through the BGP protocol and their own AS numbers. To use this scheme to achieve multi-line interconnection, IDC needs to apply for its own IP address segment and AS number in CNNIC (China Internet Information Center) or APNIC (Asia-Pacific Network Information Center), and then broadcast this IP address to the networks of other network operators through the BGP protocol. After interconnecting with BGP protocol, all backbone routing devices of network operators will judge the best route of IP section of IDC computer room to ensure high-speed access of users of different network operators.

The computer room that uses BGP scheme to realize double-line interconnection or multi-line interconnection is called BGP computer room.

Advantages

1. The server only needs to set an IP address, and the best access route is determined by the backbone router on the network according to route hops and other technical indicators, and will not occupy any system resources of the server. Both uplink and downlink routing of the server can choose the optimal path, so it can really achieve high-speed single-IP high-speed access.

2. Because BGP protocol itself has the characteristics of redundant backup and elimination of loops, when IDC service providers have multiple BGP interconnection lines, they can backup each other's routes, and when one line fails, the route will automatically switch to other lines.

3. Using BGP protocol can also make the network have strong expansibility, can interconnect IDC network with other operators, easily realize single IP multi-line, and make the user access of all interconnected operators very fast. This is incomparable with double IP and double lines.

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