Boot device, single board of network equipment and network equipment

Abstract

The invention provides a startup device, a single board of a network device and a network device. The startup device comprises a first CPU, an exchange chip and a second CPU. The data transmission pinof the first CPU is connected to the multiplexing pin of the switching chip. A reset pin of the switching chip is connected with a second CPU; The multiplexing pin of the switching chip is also connected with a pull-up resistor. When the preset event is satisfied, the second CPU de-resets the switching chip so that the switching chip is configured based on the level on the multiplexing pin. By default, defining the timing of the de-reset of the switching chip, That is, only when the preset event is satisfied, the second CPU performs the de-reset operation, so as to avoid the pin instability of the first CPU in the power-on process and affect the configuration of the port of the switching chip, and ensure the correct configuration of the working mode of the switching chip port during power-on and power-on, so as to ensure the normal communication between the two CPUs.

Description

technical field [0001] The present application relates to the technical field of network communication, and in particular, relates to a single board of a network device and the network device. Background technique [0002] For network equipment, in order to meet more application scenarios, the implementation scheme of dual CPU (Central Processing Unit, central processing unit) will be adopted, such as figure 1 As shown, CPU1 is responsible for human-computer interaction and other work, and CPU2 is responsible for data communication. The two CPUs execute their own services independently of each other, but there is information interaction. For example, CPU2 is responsible for collecting the video data of the camera, and CPU1 is responsible for displaying the video data on the screen. The two CPUs need to exchange video data streams. The information exchange channel is often constructed by a switch chip, and the CPU2 configures the switch chip through the management bus, and c...

AI Technical Summary

Problems solved by technology

However, in some special cases, for example, CPU1 has not been powered on after the switch chip is reset. At this time, the signal transmitted from CPU1 to the multiplexed port of CPU2 is unstable, which may cause the configuration word error of the switch chip. In this case, the switch chip and the CPU1 cannot communicate normally

[0004] Therefore, there is a problem in the prior art that the two CPUs cannot communicate normally due to the wrong configuration of the port operation mode of the switch chip when the network device is powered on and off.

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