System for automatically switching system management buses

Abstract

The invention discloses a system for automatically switching system management buses. The system comprises two identical computing boards, two identical switching boards and a back board; each computing board is provided with a BMC chip; each switching board is provided with a switching device; the back board supports the computing boards and the switching boards, each computing board or each switching board is connected to one grounded pin or one suspended pin in the back board; two identical switching chipsets connected with the system management buses are established between each computingboard and the corresponding switching board, each switching chipset is provided with an onboard signal source and two switching chips, and every two switching chips use different output ends for beingconnected to one of each computing board and each switching board through the system management buses; each onboard signal source is connected to the grounded pins or the suspended pins and also connected to selection ends of the two corresponding switching chips; the other one of each computing board and each switching board is connected to one input end of each switching chipset. By means of the system, the system management buses can be automatically switched according to demands, and the mounting and maintenance difficulty is reduced.

Description

technical field [0001] The present invention relates to the computer field, and more specifically refers to a system for automatically switching system management buses. Background technique [0002] With the continuous improvement of server processing capabilities, its internal interconnection architecture has become increasingly complex. For example, there are three types of boards in a multi-channel server, which are two computing boards (CPU_BOARD), two switching boards (SW_BOARD), and one backplane (BP). The computing board and the switching board are connected through the backplane pin-to-pin (pin-to-pin). For example, the computing board above the backplane is CPU_BOARD0, and the one below the backplane is CPU_BOARD1; The one on the right side of one side is SW_BOARD0, and the one on the left side is SW_BOARD1. Therefore, the board interconnection topology is as follows: figure 1 shown. The BMC (baseboard management controller) chip on the computing board communic...

AI Technical Summary

Problems solved by technology

[0004] Although this solution meets the BMC management function of the above requirements, it needs to maintain the BOM (bill of materials) with two different switch boards to distinguish the left and right boards; at the same time, because the appearance of the left and right switch boards is similar, only through the R1 and R2 resistors. Therefore, it is easy to cause errors in the installation position, which increases the difficulty of installation and maintenance

There is currently no effective solution to the problem of difficulty in installation and maintenance due to different board formats in the prior art

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