Marnet Interconnection: Detailed Web site ventilation and Solutions

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Ventilation, also known as: Network ventilation, the current international network is a common phenomenon. A lot of the first time to use foreign space webmaster, how also do not understand, why in the Internet Café clearly can open their own website, once back home, how can not open? Why Telecom open a very fast website, netcom but need several times even 10 times times to visit? With this question, the author Visited the current domestic well-known U.S. IDC operator Marnet Interconnection technology Director: Yue Lang.

Excuse me, network ventilation This phenomenon is how to form?

Yue: To understand this phenomenon, we must first understand the status of the domestic network and foreign network situation, first of all, China's mainland network mainly consists of telecommunications, and Unicom two major ISPs, under which there are a variety of local private ISP operators, mainland China to overseas has 5 international exports, in terms of export bandwidth, telecommunications accounted for the total bandwidth of 70 % above, Unicom accounted for more than 20%, leaving less than 10% of education research network, such as private network possession.

In this complex network environment, assuming that there is data congestion on one of the continent's international exports, it will be difficult for several provinces that exchange data through the export to visit abroad, while those with 4 other exports will not feel abnormal; It may be difficult for netcom users to visit foreign websites, but telecommunications do not feel unusual.

So why sometimes, the United States a computer room site visit will be very slow, but the other room is not?

Yue: This is going to be from the network environment in the United States, the United States ISP have a lot of different areas of the computer room is generally used by different ISP business lines, these ISPs are independent with China Telecom and Unicom signed a networking agreement, with different sizes of export bandwidth. For example: The United States PR Room is 123 of the company's network, and T2 is the use of the ABC company's network, assuming that the PR room now needs to exchange with overseas data size, more than 123 of the company's export bandwidth, then, in overseas will be difficult to access to put in the PR room site, Access to the T2 computer room site will not have any problems, even in the presence of export congestion, you will find that in the United States to visit the site is no problem, but not overseas.

That being the case, how should we judge which link causes the ventilation?

Yue: The question is really simple, for example, if you find yourself in a foreign site that you can't access, you can use the Website speed Detection tool on the Web to detect if all the networks in the mainland are inaccessible, or only in your area or only some network.

If only a small part of the region is inaccessible, it is certainly a problem for the urban network in the region; if only a certain network, such as telecommunications can be accessed, netcom can not access, it is certainly the international export of netcom congestion. And if there is no domestic visit, you can try foreign access, if the foreign access, it can only suspect that the submarine cable has been broken off. There are many initial use of overseas space users always think as long as the site is not open, is the engine room or server problems, in fact, in foreign countries, especially the United States, the possibility of server problems is very small, the site can not open or open slowly, at least 30% of the time is caused by ventilation.

Since the effect of ventilation on network stability is so large, what is the solution?

Yue: At present, the best solution is BGP routing technology, after our years of observation and statistics, because the United States ISP many, and relatively independent, almost every year two ISP network at the same time ventilation, therefore, to completely eliminate the ventilation, must use BGP technology, Let IDC company in accordance with their own customer needs, free switch ISP line. In March this year, Marnet Interconnection has taken the lead in self-service management of the BGP router, can independently according to the needs of users to switch lines, to avoid network congestion, the maximum elimination of network ventilation. At present, Marnet Interconnection is developing a new BGP strategy to ensure that the network and telecommunications lines are not affected by the ventilation.