The classification Encyclopedia of Modular Routers

Source: Internet
Author: User

The application of the

Modular router is very extensive, and the main classification of routers is analyzed here. Router products, according to different classification criteria have a variety of types. Common categories have the following categories:
By performance grade divided into high, medium and low-grade routers
typically routers that have a router throughput greater than 40Gbps are called high-end routers, and back throughput between 25gbps~40gbps routers is called mid-range routers and will be lower than 25Gbps as a low-end router. Of course, this is only a macro-division standards, the manufacturers are not exactly the same division, in fact, the division of the router grade is not only based on throughput, there is a comprehensive index. Cisco, the largest market share, for example, the 12000 series for high-end routers, 7500 of the following series routers for low-end routers. The
structurally divided into modular routers and "non-modular routers"
Modular architecture provides the flexibility to configure the router to accommodate the growing business needs of the enterprise, and the modularity can only provide fixed ports. In general, high-end routers are modular structures, and low-end routers are not modular. From the functional division, routers can be divided into "backbone routers", "Enterprise Routers" and "access-level routers."
Backbone routers are the key devices for enterprise-level network interconnection, which is of great data throughput. The basic performance requirements for backbone routers are high speed and high reliability. In order to obtain high reliability, the traditional redundancy technology such as hot backup, dual power supply and dual data access is widely used in network system, which makes the reliability of backbone routers generally not a problem.
Enterprise Routers connect many terminal systems with more objects, but the system is relatively simple and data traffic is small, and the requirement for such routers is to achieve as many endpoint interconnects as possible, while also requiring the ability to support different service quality. Access-level routers are mainly used to connect Small business customer groups within the home or ISP. Dividing a modular router into a "border router" and an "intermediate node router" is usually divided by the location of the network.
It is obvious that the "border router" is on the edge of the network for connections to different network routers, while the "intermediate node router" is in the middle of the network and is typically used to connect different networks and play a role as a bridge for data forwarding. Because of their different network location, its main performance also has a corresponding focus, such as the middle node router because of the face of a variety of networks. How do you identify the nodes in these networks? This is the MAC address memory function of these intermediate node routers.
based on the above reasons, the choice of the intermediate node modular router needs to pay more attention to the MAC address memory function, that is, the need to select a larger cache, MAC address memory strong modular router. But the border router because it may have to be accepted at the same time from many differentThe network router sends the data, therefore this request this boundary router's backplane bandwidth to be wide enough, certainly this also must with the boundary router's network environment to decide. From the performance can be divided into "wire-speed router" and "non-wire-speed routers."
the so-called "wire-speed router" is completely can be transmitted media bandwidth for unobstructed transmission, basically there is no interruption and delay. Usually the wire-speed router is a high-end router, with very high port bandwidth and data forwarding capabilities, can be transmitted at the media rate packet; The low-end router is not a wire-speed router. But some new broadband access routers also have a wired speed forwarding capability

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