What is the life of the "traditional network" revolution in the Routing Switching all-in-one machine? (1)

Since the 1990s S, Major leased lines provided by carriers to enterprise users have undergone great changes. From the early widespread use of X25, DDN, PSTN Telephone lines, to the later 2 m E1 line, to the current MSTP, bare optical fiber and other lines, bandwidth is growing, Ethernet interface access has become a trend.

The business terminal equipment of financial outlets has also changed. In the early days, UNIX frontend hosts were deployed at outlets, and asynchronous dumb terminals were used for business. In order to reduce the maintenance cost of outlets, in the later stage, we generally received data from local branches or provincial branches on the front-end machine. The terminal model was gradually changed from an asynchronous port mute terminal to a network terminal or PC. In addition, Ethernet access is widely used for office sites, queuing machines, and running horse screens.

In this situation, vrouters are used to access the wide area networks, and vswitches are common access modes for LAN access. However, the "vro + vswitch" mode requires two devices. The purchase cost is high and the management and maintenance are troublesome. The routing switching machine came into being.

The routing and switching functions are integrated on the routing and switching machine. Because IT is easy to deploy and easy to configure, and integrates multiple businesses on a single platform, the Routing Switching all-in-one machine reduces network complexity, IT staff learning costs, and equipment procurement and maintenance costs. With the adoption of IP Access by financial outlets, the routing and switching all-in-one machine has become a mainstream product for access by financial outlets.

In order to seize the business opportunities brought about by this change, various data equipment manufacturers have successively launched their respective Routing Switching appliances. Are there any technical differences between these versatile Routing Switching Machines?

According to its implementation principle and implementation mechanism, there are two different exchange architectures.

Two different exchange Architectures

Based on the principle of implementing the switching function, the Routing Switching machine has two architectures: integrated switching architecture and distributed switching architecture.

Integrated switch architecture: the switch function and the routing function of the router switch machine share the CPU, and the switch chip is directly integrated into the router to provide a unified Startup File and configuration file.

Distributed switching architecture: the switch function of the router switch has independent CPU and startup files. The switch part is implemented on an independent and mature switch platform.

The hardware schematic of the two switching architectures is as follows. In essence, the exchange chip is used to implement its switching function. The exchange chip is connected through the data channel and the main CPU of the router. Only the management control of the switch part of the integrated switching architecture is implemented by the OS of the router. The switch part of the distributed switching architecture has one CPU and has an independent OS and CPU.

Integrated eXchange Architecture

Distributed switching architecture