Classification of modular Routers

This article mainly introduces the classification of modular routers in detail, and introduces modular routers and non-modular routers in structure. I believe this article will help you understand modular routers.

High, Medium, and low-grade routers by performance

Generally, a router with a vro throughput greater than 40 Gbps is called a high-end router, with a back-end throughput of 25 Gbps ~ A vro between 40 Gbps is called a mid-range router, and a vro lower than 25 Gbps is considered as a low-end router. Of course, this is only a macro classification standard, and the Division of manufacturers is not completely consistent. In fact, the division of router grades is not only based on throughput, but also has a comprehensive indicator. Take the Cisco company with the largest market share as an example. The 12000 series are high-end routers, and The 7500 or lower series routers are low-end routers.

The structure is divided into "modular Router" and "non-modular Router"

The modular structure can be flexibly configured to meet the increasing business needs of enterprises. Non-modular structures can only provide fixed ports. High-end routers are generally modular, and low-end routers are non-modular. In terms of functions, routers can be divided into backbone-level routers, enterprise-level routers, and access-level routers ".

Backbone Router is a key device for enterprise-level network interconnection. It has a large data throughput and is very important. The basic performance requirements for backbone routers are high speed and high reliability. To achieve high reliability, network systems generally use traditional redundancy technologies such as hot backup, dual-power supply, and dual-data channels, so that the reliability of backbone routers is generally not a problem.

Enterprise-level routers connect to many terminal systems with many connection objects, but the system is relatively simple and the data traffic is small. The requirements for such routers are to achieve as many endpoints as possible in a cheap way, at the same time, it is required to support different service quality. Access-level routers are mainly used to connect small enterprise customer groups in the home or ISP. The modular routers are generally divided into "border routers" and "intermediate node routers" based on their network locations ".

It is obvious that "VBR" is at the edge of the network and used for connection between different network routers, while "intermediate node Router" is in the middle of the network and is usually used to connect different networks, it serves as a bridge for data forwarding. Because their respective network locations are different, their main performance also has a corresponding focus, such as intermediate node routers because they need to face a variety of networks. How can we identify nodes in these networks? It relies on the MAC address memory function of these intermediate node routers.

Based on the above reasons, when selecting the intermediate node modular router, you need to pay more attention to the MAC address memory function, that is, you need to select a modular router with a larger cache and strong MAC address memory. However, because the VBR may accept data from many different network routers at the same time, this requires that the bandwidth of the VBR be wide enough, of course, this depends on the network environment of the VBR. The performance can be divided into "line rate Router" and "non-line rate Router ".

The so-called "wire speed Router" means smooth transmission based on the bandwidth of the transmission media, basically without interruption or delay. Generally, a line-rate router is a high-end router with high port bandwidth and data forwarding capabilities. It can forward data packets at a media rate. The low-end router is a non-line-rate router. However, some new broadband access routers also provide fast-forward capabilities.