Router as the core of IP network equipment, the technology has become the key technology of information industry, the equipment itself in the data communications play an increasingly important role. At the same time as powerful router equipment, and technical complexity, the manufacturers of the router to achieve too much selectivity. We all know, Router In the computer network has a significant place, is the computer network of bridges, not only can be connected through different networks, but also select the data transmission path, and to block illegal access. Router as the IP core network equipment, the technology has become the key technology of information industry, the equipment itself in the data Communicate Play an increasingly important role. At the same time as powerful router equipment, and technical complexity, the manufacturers of the router to achieve too much selectivity. Router is to connect multiple networks or network equipment segment, it will be differe nt networks, or segments of data information between the "translation" to enable them to each other, "read" to understand each other's data, which form a larger network. Router has two typical features, namely, data path functions and control functions. Data access capabilities, including forwarding decision, forwarding backplane and output link scheduling, usually accomplished by a specific hardware; control for general use Software To achieve, including the exchange of information between adjacent routers, system configuration, system management. Over the years, the development of router-downs. 90 mid, traditional routers become bottlenecks restricting the development of the Internet. ATM Switch Instead, a core IP backbone network, the router into a supporting role. Into the late '90s, Internet scale further expanded to double every six months traffic, ATM networks has become a bottleneck, the router make a comeback, Gbps routing switches, available in 1997, people began t o replace the ATM switches Gbps Routing Switch, as the framework for router the core backbone network. Router has been developed to the fifth age. Let us look at the router technology development and its typical products. 1, router technology: 1, the first generation router technology and its products First IP network is not large, the gateway to connect the equipment needed and the need to deal with very small load. This time the gateway (router) is basically a computer with a network interface card insert multi-block approach to achieve. Interface card and the CPU ( CPU ) Through the internal bus connected between, CPU is responsible for all transactions, including routing the collection, forwarding address, equipment management. After the network interface received the packet passes through the internal bus CPU, the CPU after completion of all processing passed out from the other network interface. Typical products Cisco2500 series routers, Huawei QuidwayR2500 series rout ers. Huawei QuidwayR2500 below to illustrate series routers. Huawei QuidwayR2500 series routers include QuidwayR2501/2501E, QuidwayR2509/2509E, QuidwayR2511/2511E, QuidwayR4001/4001E of eight routers. QuidwayR2500 series routers for small and medium Huawei Office Room developed a new generation of routers. QuidwayR2500 series routers with 32-bit microprocessor technology to use Huawei's network operating system platform - VRP common routing platform. VRP provides bilingual configure simple configuration interface, it provides rich Network Security Features, support dumb terminal access server functionality to support SNA / DLSw, providing complete branch router as a backup center technology is widely used. QuidwayR2500 series routers to provide the 8 / 16 asynchronous serial port can be used as small and medium ISP's dial-up access servers, dial-up lines can also be asynchronous interconnect eight / 16 low-speed local area network, more than two asynchronous serial protocol can be accessed with speed synchronous line, connecting remote local area network or interconnection other ISP. 2, the second generation router technology and its products: Since each message must be sent through the bus, CPU processing, with the increase of network users, network traffic increases, the number of interfaces, bus bandwidth and CPU bottlenecks on the increasingly prominent.
access point vs router
Niciun comentariu:
Trimiteți un comentariu