Fifth generation core router constructs new backbone business Network

With the development of IP technology, the rapid increase of IP users and the introduction of more IP services, traditional routers are far from satisfying the needs of the development of modern network business. In this network background, as the fifth generation of router advocates Huawei Company, launched Quidway NetEngine80 core router and Quidway NETENGINE40 Universal switching router, focusing on the core IP network to solve the problems. Quidway NETENGINE80/40 Series core routers are at the industry-leading level in architecture design, device performance, business agility, compatibility, and investment protection, as of October 2002, Quidway NetEngine high-end routers have been widely used in operators network and finance, government, education, electricity and other industries. --Editor

Every technological advance is the result of new demands for business development. In the Internet bubble era, the main contradictions in the forwarding performance of routers, so one to four generations of routers the biggest step is speed. Take the fourth generation router as an example, with the commercialization of IP networks, especially after the advent of Web technology, Internet users have increased rapidly. Network traffic, especially the core network traffic to the number of levels of growth, the traditional software based IP router has been unable to meet the needs of the development of the network. Then the ASIC implementation is forwarded, and all the details of the forwarding process are implemented by hardware. In addition, crossbar or shared memory is used to solve the problem of internal exchange on the Exchange network. In this way, the performance of the router reached the gigabit, that is, the early Gigabit switched routers.

However, with the rapid development of broadband Internet, the defect of IP network technology as its foundation is exposed more and more fully. The problems of network rogue operation, the lack of IP address, the QoS of IP service and IP security are all seriously hindering the further development of the network. With the bursting of the broadband internet bubble, people have a profound introspection-business is the real value of the network, all the technical requirements should revolve around the business. A variety of new technologies have emerged (such as network management technology, user management technology, business management technology, VPN technology, controllable multicast technology, IP QoS technology, traffic engineering technology, etc.), IP standards are gradually modified mature.

With the advent of new technologies and standardization of the development of high-speed routers, the business function requirements are increasingly high. The fifth generation routers adopt programmable, specially designed for IP network processor technology in the key IP business process processing. Network Processor (NP) is usually composed of several microprocessors and some hardware coprocessor, and multiple microprocessors are processed in parallel, and the process is controlled by software. For some complex standard operations (such as memory operation, routing table lookup algorithm, QoS Congestion control algorithm, traffic scheduling algorithm, etc.), the hardware coprocessor is used to improve the processing performance. The integration of business agility and high performance is realized.

The fifth generation routers are compared to the fourth generation routers, there are the following features: the use of network processor technology to achieve IP message processing and forwarding, to ensure high-speed forwarding at the same time the complex protocol processing, so as to support the rich business; by upgrading the software to add new processing capabilities to quickly respond to the user's business needs, adapt to network development; It has strong support capability of VPN, stream classification, Ip-qos, MPLS and so on, and provides perfect QoS mechanism to meet different users ' needs, adopt large capacity switch network structure, fully consider the demand of telecom users, meet the requirements of security, stability and reliability of users.

The emergence of the fifth generation routers greatly satisfies the demand of the current data, voice and image, and greatly enhances the network's support capability for MPLS VPN. Because the fifth generation router has the formidable superiority in the business characteristic, has become the current construction broadband backbone network, gathers the network the first choice. With the further reduction of cost and the further enrichment of network services, the fifth generation routers using network processor technology are developing to the lower end of the network.