Independent host Webmaster Prerequisites: What is a true dual-line host

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The introduction of dual-line mainframe in order to solve the domestic South Telecom and North Netcom users interconnection issues special launch of the intelligent dual-line host services. Refers to the same server has both the telecommunications network and Netcom network two lines. By routing intelligence to judge the user's IP address when the telecom users visit the website to visit the Telecom line, Netcom users visit the Web site to visit the Netcom line, so as to achieve the purpose of the North-South exchange.

Dual-line host classification has single IP and single card, dual IP address, dual network card, dual IP address three ways. One single network card dual IP and dual IP two kinds have a telecommunications IP address and a netcom IP address, in this case, the way is the telecommunications user access to telecommunications IP address, Netcom user access to the network IP address.

In recent years, the emergence of a two-wire multi-line technology called BGP routing, the implementation of the same way as the early dual-card dual-line is the biggest feature is that the server only needs a network card, this dual-line technology is also known as "full route Two-line", today to say, that is,

BGP (Boundary Gateway Protocol) Protocol is mainly used to interconnect the Internet as (autonomous system), the most important function of BGP is to control the transmission of Routing and select the best route. Netcom and China Telecom both have the as number (autonomous system number), the country's major network operators are mostly through the BGP protocol and its own as number to interconnect. Use this scheme to achieve dual line needs in CNNIC (China Internet Information Center) to apply for IDC's own IP address segment and as number, and then through the BGP protocol to broadcast this IP address to Netcom, telecom and other network operators, Using BGP interconnection, all backbone routing devices of netcom and Telecom will judge the best route of IP segment of IDC room to ensure the high-speed access of Netcom and telecom users.

Using the eight-degree network BGP dual-line scheme has the following advantages:

1. The server only needs to set an IP address, and the best access route is determined by the backbone routers on the network based on the route hops and other technical metrics, not on any system resources that occupy the server. The upstream routing and downlink routing of the server can choose the best path, so it can realize high-speed single IP dual-line access.

2. Because the BGP protocol itself has redundant backup, eliminates the characteristic of the loop, so when the IDC service provider has many BGP interconnection line can realize the route mutual backup, when one line fails, the route automatically switches to other lines.

3. The use of BGP protocol can also make the network has a strong scalability can be the IDC network with other operators to interconnect, easy to achieve a single IP multiple lines, so that all the Internet operators access to users are very fast. This is a dual-IP dual-line unmatched.

Although the BGP solution is the best solution, because this project needs the IDC provider's equipment input and the bandwidth input aspect to be bigger and the technology is more complex, at present the domestic adoption this plan includes eight degree network.

Do you use a real dual-line host? New to join the ranks of you, do not see the two-line on the hands of the first to understand the two-line related knowledge, to do the eye bead!

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