VpsAdd Tutorial: What is a BGP datacenter and what is a BGP line

VpsAdd tutorial: What is BGP datacenter,What is a BGP line I often see bgp lines and so on on some virtual hosts in mainland China. Today I will find some content and share it with you: Partial data source: Interactive Encyclopedia BGP Computer Room – Origin of BGP Computer Room BGP (Border Gateway Protocol) is a routing protocol used to connect independent systems on the 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 IP addresses available on the Internet. BGP was designed to replace the original Exterior Gateway Protocol EGP. It is also considered a path vector protocol. BGP is mainly used for interconnection between Internet AS (autonomous systems). The main function of BGP is to control the propagation of routes and select the best route. China Netcom, China Telecom, China Railwaycom and some large private IDC operators all have AS numbers. Most of the major network operators in the country achieve multi-line interconnection through the BGP protocol and their own AS numbers. To use this solution to achieve multi-line interconnection, IDC needs to obtain the AS number from CNNIC (China Internet Network Information Center) or APNIC (Asia Pacific Network Information Center), and then broadcast this IP address to other network operators' networks through the BGP protocol. . After interconnection using the BGP protocol, all backbone routing equipment of the network operator will determine the best route to the IP segment of the IDC datacenter to ensure high-speed access for users of different network operators. [1] The datacenter that uses the BGP solution to realize dual-line interconnection or multi-line interconnection is called a BGP datacenter. BGP datacenter – Advantages of BGP datacenter 1. The server only needs to set an IP address. The best access route is determined by the backbone router on the network based on the routing hop count and other technical indicators. It will not occupy any system resources of the server. Both the upstream and downstream routes of the server can choose the optimal path, so it can truly achieve high-speed single-IP high-speed access. 2. Since the BGP protocol itself has the characteristics of redundant backup and loop elimination, when an IDC service provider has multiple BGP interconnection lines, mutual backup of routes can be achieved. When one line fails, the route will automatically switch to other lines. 3. The use of BGP protocol can also make the network highly scalable. It can interconnect the IDC network with other operators, easily realize single IP multiple lines, and ensure that users of all interconnected operators can access quickly. This is unmatched by dual IP and dual lines. BGP datacenter – BGP datacenter line technology BGP is a routing protocol between autonomous systems. Its main function is to exchange network reachability information with other BGP speakers. A BGP speaker is any device configured for BGP. BGP uses TCP as its transport protocol (port 179), which provides reliable data transfer. Two BGP routers form a transport protocol connection. These two routers are called neighbors or peers. Once a transport connection is formed, the two pairs of routers exchange messages to open and confirm the connection parameters. In this step, the routers exchange information such as BGP version number, AS number, duration, BGP identifier, and other optional parameters. If any parameter is inconsistent between peers, an error notification will be sent and the peer connection will not be established. If the peer routers agree on these parameters, the entire BGP routing table is exchanged via UPDATE messages. The UPDATE message contains a list of reachable destinations through each system (i.e., network layer reachability information NLRI) and the path attributes of each route. Path attributes include information such as routing source (ORIGIN) and priority. The BGP table is valid for each peer during the BGP connection process. If a routing message changes, neighbor routers use incremental updates (messages) to convey this information. BGP does not require updating routing information. If no routing changes occur, BGP peers only exchange keepalive messages. Keepalive messages are sent periodically to ensure that the connection remains valid.

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