A two-line server is actually a server with two lines of telecommunications and Netcom access. Through intelligent analysis of the user's IP address, the telecommunications user accesses the telecommunications line, and the Netcom user accesses the network line. In this way, the purpose of fast access throughout the country is achieved. According to different access modes of the equipment room, the dual-line service access has three access modes: single IP access, single NIC dual IP access, and dual NIC dual IP. The best one is single NIC dual IP access. Provide a telecom IP and Netcom IP dual-line, multi-line technology effect, the most critical issues are two, one is the network card, IP working mode, and the second is the intelligent analysis of the user's IP address is stable and reliable.
start with the first question:
1, the dual-card dual-IP lane: some early engine room due to its technical /equipment tests, can not be achieved in the room to switch the router only Using one server and two network cards, the two network cables are respectively connected to the telecom/communication network. This will cause the server to randomly fluctuate the route, and cause the user to access the fast and slow, or even completely inaccessible. This is actually eliminated. method.
2, two-lane single IP: IP dual-line single line, this is a new routing technology, the IP does not belong to any telecommunications operator, when parsed, automatically determine the kind of visitors The line allows the IP to take the line and meet the needs of each line. However, the single-IP dual-line service switches the corresponding telecommunication/netcom line according to the subscriber line at the router level of the equipment room. Since most of the dual-line equipment rooms obtain IP addresses from telecommunications and Netcom, there is no right to switch lines, which makes it impossible to reach the entire network. For a quick purpose, and some of the equipment rooms with IP autonomous domains, but can not get enough bandwidth from Telecom/Netcom, the user access speed is not ideal.
3, single-card dual-IP intelligent two-: This method is somewhat similar to the above, but due to the binding of the two IP on a single card, it is possible to separately obtain an IP address from Telecom /Netcom, by domain name Analyze the server for intelligent switching, thus avoiding the weakness of the single IP dual line and realizing fast access to the entire network.
online there are some operators use a third-party ISP lines to achieve the double effect, that is, non-line China Netcom's non-telecom, such as: Mobile, China Unicom. This kind of line connection is very good for both telecommunication and Netcom. The effect is similar to the real double line. However, after all, there are bandwidth restrictions. The speed of small websites is very good, and large websites are not good.
Therefore, we choose the time, you can try the menu card two-lane dual-IP or a third-party ISP lines, results are good.
matter what kind of wire, you need to IP address of the user and the server can choose to parse the line, so the IP address resolution technology, equipment and a huge sound library address is very important - it The principle is that when the user visits the website, the DNS server first queries the IP address of the website, and the DNS server determines whether the user is a telecommunications Internet access or a Netcom Internet access? It is the telecom IP address that returns to the telecom IP address; it is the Netcom IP address that Netcom accesses online; this achieves the purpose of intelligent judgment and intelligent identification.
Because of this analytical technique has a certain threshold, so not every operators are able to achieve, and only uses intelligent DNS resolution of the two-host can say is the real double service.