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The out-of-band management system defined by IPMI only supports IIC bus for inter-node communication, which has low communication rate and poor flexibility for multi-node layout, and it is not suitable for cluster management applications with large data volume of multiple nodes. This article adopts Ethernet instead of IIC to realize the structure layout of multi-node distributed cluster management system. The operation and maintenance information are trans-mitted by RMCP+, but the original RMCP + is rate limited and less stable in the transmission of large data volume in multi-cluster management system due to the use of AES-CBC encryption algorithm. This article optimizes the RMCP + communication process logic to reduce the redundancy in the system cascade data about transmission encryption and decryption calculation, and proposes the method of using parallel CTR for data block encryption instead of serial CBC data block encryption, which realizes the loose coupling of database decryption in data packets, in-creases the decryption rate of data cipher text at remote clients, educes the error transmission caused by tight coupling of data blocks, and improves the communication efficiency. The experimental environment of QEMU-based multi-node management system is built to verify that the communication method proposed in this article is suitable for the operation and maintenance management of distributed multi-node complex ATCA.

ATCA Multi-Node Management System Protocol Optimization