分享一下DMTF发布的NCSI Spec ver1.0.1

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【暗杠】 发表于 2018-8-31 19:18:51 | 显示全部楼层 |阅读模式
本帖最后由 【暗杠】 于 2018-8-31 19:21 编辑


NC-SI ("Network Controller Sideband Interface") is an electrical interface and protocol defined by the Distributed Management Task Force (DMTF), which enables the connection of a Baseboard Management Controller (BMC) to a set of Network Interface Controller (NICs) in server computer systems for the purpose of enabling out-of-band remote manageability.


Signal                                            Description
REF_CLK            A 50 MHz clock reference for receive, transmit, and control interface
CRS_DV             Carrier Sense/Receive Data Valid for traffic sent from one of the NCs
RXD[1:0]            Receive Data (from NC to BMC)
TX_EN               Transmit Enable - Data Valid for traffic sent from the BMC
TXD[1:0]            Transmit Data (from BMC to NC)
RX_ER                Receive Error
ARB_IN              Hardware Arbitration ring - input
ARB_OUT           Hardware Arbitration ring - output


NC-SI traffic can be either pass-through or control traffic, with both traffic types in form of Ethernet frames. Pass-through traffic consists of data exchanged between the BMC and the network via the NC-SI interface. Control traffic includes frames used to configure and control of the NC-SI interface and is identified by an EtherType of 0x88F8.
There are three types of control packets:
  • Commands, sent from the BMC to one of the NCs.
  • Responses, sent by the NCs as results of the commands.
  • AENs (Asynchronous Events Notifications), sent asynchronously by the NCs, equivalent to interrupts.








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NCSI_Spec_rev1.0.1.pdf

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NCSI,NC-SI,BMC,IPMI,AST2400,Spec

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