Vro Technology Development History

China's vro technology has developed very rapidly. Here we mainly introduce the innovative upgrade of vro technology, including the evolution of 80/20 rules. As the core device, the router is in a crucial position on the IP network. With the popularization of Internet applications, network bandwidth increases rapidly.

Vro technology is also facing new changes as users demand higher service quality. Exchange Routing Technology is a hot topic in this field. It not only solves communication traffic problems, but also has higher network control and management capabilities.

80/20 rule Evolution

The disadvantages of software-based router technology are well known. Software-based router technology is sufficient when network traffic is mainly used within the Working Group. Because the main network traffic is not cross-route boundary, the slow forwarding performance of the router technology will not affect the implementation of the routing protocol. This is the so-called 80/20 rule, that is, 80% of the network traffic occurs in the Working Group, and 20% of the network traffic is carried out across the Working Group.

However, the network environment has changed dramatically, as Web applications have experienced explosive growth, network traffic distribution models have become unpredictable, and the number of users has increased exponentially. However, controlling network traffic is still an important network requirement, and people can no longer accept the performance defects of software-based router technology. Now, the 80/20 rule has been converted to 20/80.

During a heated discussion in the industry on the exchange-type router technology, performance occupies a central position. The software-based router technology forwards data packets at a rate of 100,000 packets per second, while the rate of data packets forwarded by the Exchange router reaches tens of millions of packets per second. This performance improvement is achieved by changing the architecture: Traditional router technology uses software running on a microprocessor to forward data packets; the switched router technology uses hardware, such as dedicated Integrated Circuit ASICs ).

Although the basics of packet forwarding technology have changed, the tasks to be completed are the same: Check the incoming data packet and compare its target address with the project in the route table, and then send it from the correct interface. In this process, data packets also accept some additional processing tasks.

Improvement of network control capability

Traditional router technology cannot guarantee both performance and control functions. The control function is provided by a series of rules, for example, priority, access denied, or accounting data. When data packets enter the vro technology, these rules also apply to data packets. In software-based router technology, these rules are stored in a software database, and each data packet must be checked when it passes. This is the root cause of the problem: the microprocessor processing the routing function must also query the database. At this time, data packets are not sent, so the router technology has low forwarding capabilities.

The new generation of exchange router technology will not encounter this problem, because query and control functions are implemented in hardware. The key to combining the performance and control functions of a switched router is how much the ASIC can read per packet.