NCSI_DSP0222_1.0.0.pdf and NCSI_DMTF_DSP0222_1.2.0b.pdf Network Controller Sideband Interface (NC-SI) Specification

网络技术的飞速发展使得人们对于服务器的带外可管理性及可控制性提出了更高的要求。通过带外管理，工程师可以在任意地点通过网络连接到相应的服务器上，进行一系列的管理与维护，而不再需要长时间驻守在嘈杂的实验室环境中。NCSI（Network Controller Sideband Interface）就是一个由分布式管理任务组（Distributed Management Task Force, DMTF）定义的用于支持服务器带外管理的边带接口网络控制器的工业标准。

BMC重要的网络边带系统协议

In out-of-band management environments, the interface between the out-of-band Management Controller and the Network Controller is critical. This interface is responsible for supporting communication between the Management Controller and external management applications. Currently there are multiple such proprietary interfaces in the industry, leading to inconsistencies in implementation of out-of-band management.

NCSI协议文档，送给有需要的朋友。

全面，详细的NCSI硬件接口规范，服务器硬件开发必备手册

NCSI英文参考手册，在项目bring up时需详细参阅。

A Management Controller (MC) or Baseboard Management Controller (BMC) usually requires Ethernet connectivity for remote management. Initially, MC’s had a dedicated Ethernet port to achieve this connectivity. Later, Ethernet manufacturers started using proprietary sideband interfaces to provide a mechanism by which the MC could share an Ethernet port with the Operating System. This interface was generally based upon the I2C/SMBus interface, but had a proprietary protocol. The DMTF set out to create an industry standard sideband interface that would operate at a much greater speed than SMBus and alleviate some of the burden on BMC engineers who, for years, had been writing different Ethernet code based on which manufacturers’ Ethernet device was used as the LOM (LAN on Motherboard) for the server board.