Demonstrate four generations of WAN routing technology "genealogy"

With the development of China's routing technology, emerging technologies are emerging. The WAN routing technology is one of them. Here we mainly introduce the development history of the WAN routing technology. Since the company has promoted the application of multi-Wan routing technology, the "Xin Xiang" enterprise-level broadband routers and dedicated Broadband Router series products have been affirmed by the majority of users.

With its strength, haofeng once again made a breakthrough in the Multi-Wan routing technology after gaining a lot of market practices and meticulous research. He began to upgrade the fourth generation of Multi-Wan routing technology, it maintains the advantages of leading technology. With rapid development in just five years, the multi-Wan routing technology has experienced four generations.

Generation 1: IP balancing

IP balancing is a technology that distributes WAN port loads based on the number of IP addresses. In general, he is the number of people, 1, 3, 5 go WAN1, 2, 4, 6 go WAN2. This is the most primitive technology in the application of multi-Wan routing technology. The factory settings of some Broadband Router products are still IP balancing by default. Although there are few opportunities for such applications to encounter problems, such as QQ and bubble Hall support, they sacrifice the advantages of multi-wan. Strictly speaking, IP balancing is equivalent to the superposition of two or more single WAN products.

Second generation: Server Load balancer or Dual Network

The second generation of Multi-Wan routing technology includes two types. One is balancing, the other is shunting, and the first is load balancing. It allocates and schedules all Intranet Session requests to bind and aggregate bandwidth. Server Load balancer is more advanced than IP address balancing because it processes sessions rather than IP addresses. Another second-generation technology is dual-network. Yiba's dual-network function is to optimize access paths for two broadband carriers, such as China Telecom and China Telecom. It requires a database to store the IP address distribution and interconnection status of the carrier's network, identify the network belonging of the accessed server based on the information, and connect the access through the nearest WAN port. Most of the most common Internet cafe broadband routers on the market are basically second-generation products.

Third generation: Load Balancing with multiple networks

If there are more than three broadband lines and the lines are divided into two carriers, the above two second-generation multi-Wan routing technologies are not applicable. 1. The relationship between Server Load balancer and multiple networks needs to be considered for Load Balancing under multiple networks. Server Load balancer and a multi-network can be said to be a contradiction between the two. The two are mutually dependent and contradictory. to reconcile the contradiction between the two, we need a very thorough algorithm and complex and rigorous program support. For example, how does a router handle access from a China Netcom network or two Telecom lines? How should we deal with one 10 m Netcom optical fiber, one 5 M Telecommunications optical fiber, and one 1 M Telecommunications ADSL? In this case, we need to use a multi-Network Server Load balancer. At present, novogene has adopted the third-generation multi-Wan routing technology, including NuR5028, NuR5058, and NuR9058.

Fourth generation: comprehensive multi-WAN optimization strategy

The Comprehensive Optimization Strategy of Multi-Wan routing technology is to intelligently differentiate various service requirements, such as server Load balancer, one-way multi-network, identity binding, and VIP services, when multiple broadband connections are connected, according to the design rules, various requests are connected to the Internet in the best way and the best effect. Its core technology is that the CPU no longer only processes the underlying protocol data, but identifies and processes Internet businesses. Its role is to identify and process applications at the application layer, make full use of the resource advantages of the Multi-Wan routing technology to ensure the best service effect. To illustrate the meaning of the Multi-Wan Integrated optimization strategy, it is necessary to reiterate the three major roles of the Multi-Wan application:

1. Traffic Distribution and backup-when no fault exists, Intranet users can access the Internet through multiple WAN ports. Once a line fails, all the users on the line are forwarded to the normal line.
2. bandwidth convergence-bandwidth can be expanded through multiple bandwidth bundle.
3. Optional Optimal Path-ensure that the access line and the online server are placed on the same operator, such as the "one-to-many-network" function.

It can be seen that although the multi-Wan application has a huge advantage over a single line, its three major functions are also limited for different businesses. The Comprehensive Optimization Strategy of Multi-Wan is to foster strengths and circumvent weaknesses, and to integrate the business with the advantages of multi-wan. Specifically, a comprehensive multi-WAN optimization policy includes a series of content. Example:

1. Identify the identity authentication service and bind the identity. Identity binding is different from Intranet IP binding, port binding, destination IP binding, and other fixed binding policies. Due to the increasing popularity of security applications that require identity recognition, other methods except identity binding may not be able to cope with the problem, or at the cost of losing the technical advantages of multi-Wan routing.
2. Identify businesses with high bandwidth requirements and balance these "Bulk heads" to multiple WAN ports based on the massive load balancing policy to ensure bandwidth allocation. Other "sharding" services are still balanced according to the traditional load balancing policy.
3. Identify the VIP service that needs to be guaranteed), and allocate bandwidth and reserve bandwidth to ensure service effectiveness under the conditions of Multi-Wan routing technology. Such as Enterprise video applications and VPN applications.