It is reported that an IDC service provider recently plans to invest in the construction of BGP projects and wants to make a big move in the dual-line field. The rights and wrongs will not be evaluated for the time being. When talking about dual-line, we often see terms such as single IP, single network card, dual-line, dual-IP, dual-network card, dual-line. Especially the recently emerged technology called BGP dual-line is frequently mentioned. So, BGP dual-line What's going on.
The BGP (Border Gateway Protocol) protocol 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 and China Telecom both have AS numbers, and most of the country's major network operators are interconnected with their own AS numbers through the BGP protocol. To use this solution to implement dual lines, you need to apply for IDC's own IP address segment and AS number at CNNIC (China Internet Information Center), and then broadcast this IP address segment to other network operators such as China Netcom and Telecom through the BGP protocol, using BGP After protocol interconnection, all backbone routing equipment of Netcom and Telecom will determine the best route to the IP segment of the IDC computer room to ensure high-speed access for Netcom and Telecom users. BGP (Border Gateway Protocol) is a routing protocol that dynamically exchanges routing information between autonomous systems. The classic definition of an autonomous system is a group of routers under the control of a management organization that uses IGP and common metrics to forward messages to other autonomous systems. The term autonomous system is used in BGP to emphasize the fact that the management of an autonomous system provides a unified internal routing plan for other autonomous systems, which provides a consistent routing plan for those networks reachable through it. describe.
Using the BGP dual-line solution has the following advantages:
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, and will not occupy any system resources of the server. Both the upstream and downstream routes of the server can choose the optimal path, so high-speed single IP dual-line access can be achieved.
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 and interconnect the IDC network with other operators, easily realizing single IP multiple lines, so that users of all interconnected operators can access quickly.
Seeing this, we know that the BGP solution is indeed the best solution. However, because this solution requires a large investment in equipment and bandwidth from the IDC provider and is technically complex, few IDC service providers in China currently adopt this solution. BGP is very good, but it is still unknown how many users will use it. For now, it is still a relatively luxurious thing. Therefore, I can’t help but have some thoughts about the operator mentioned at the beginning. It’s easy to build a boat, but you also have to consider where the people crossing the boat will find it. Only when there is a market can products become commodities. (Source: http://www.qy.com.cn )