Method and system for controlling internal serial port access of multi-node equipment

Abstract

A method for controlling internal serial port access of a multi-node device, comprising the following steps: according to an external serial port selection instruction, controlling the first CPLD of each node in several nodes to select one of the serial port paths of several serial port devices connected to it; A CPLD transmits the serial port device information corresponding to the selected serial port path to the MUX chip in the node; controls the MUX chip to select the output path according to the control command of the external serial port, and transmits the serial port device information through the node serial port path corresponding to the output path to The second CPLD in the corresponding management board; the management board controls the second CPLD to select the node serial port path of one of the nodes according to the switching command of the external serial port; the second CPLD transmits the serial device information corresponding to the selected node serial port path to the external serial port . The solution of the present invention can realize the access requirements for serial ports of all devices in the whole system on any management board, save the cost of the backplane and facilitate research and development, debugging and fault location.

Description

technical field [0001] The present invention relates to the technical field of cloud computing, and more specifically, to a method and system for controlling internal serial port access of a multi-node device. Background technique [0002] The current storage multi-control system or server blade system has multiple nodes in the device. Generally, the Baseboard Management Controller (BMC) is used to output the serial port signals of the BMC and the operating system. With the increase of various complex applications, more and more devices need serial port access. At present, the commonly used method is to aggregate the serial port signals of each node through the complex programmable logic device (CPLD) of the management board and output them to the outside world, and the external serial port is switched to a different serial port through the serial port switching command of the CPLD. However, this method only provides BMC and operating system strings. If serial ports of othe...

AI Technical Summary

Problems solved by technology

However, this method only provides BMC and operating system strings. If serial ports of other devices are added, the demand for backplane signal pins will be increased, and expensive backplane connectors will be occupied, resulting in waste of resources.

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