NCSI Protocolos suportados

Computadores e servidores

Network Controller Sideband Interface over MCTP/RMII

O que é NCSI?

NC-SI (Network Controller Sideband Interface) is a DMTF standard that enables a baseboard management controller (BMC) to configure and manage network controllers (NICs) through a dedicated sideband channel. NC-SI can be transported over MCTP or directly over an RMII interface. The protocol handles NIC configuration commands such as enabling management traffic passthrough, setting MAC address filters, and querying link status — all without using the main network data path. Engineers debugging server network connectivity, BMC-to-NIC communication failures, and management network configuration need NC-SI decode to verify command-response exchanges and diagnose configuration errors.

NCSI Referência rápida

type Packet-based
signals MCTP or RMII
features BMC to NIC sideband management

Instrumentos Acute compatíveis com NCSI

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Como analisar NCSI com instrumentos Acute

1

Conecte seu analisador lógico Acute a interface de transporte NC-SI (sinais RMII entre BMC e NIC, ou sinais de transporte MCTP).

2

Conecte um fio terra a referência de terra da placa alvo.

3

No software Acute, selecione o NCSI protocol decoder e atribua os sinais de interface aos canais de entrada correspondentes.

4

Configure o decodificador para transport type (RMII or MCTP).

5

Capture e visualize os NC-SI commands and responses showing command types, channel/package IDs, and payload data.

Perguntas frequentes

Qual taxa de amostragem e necessária para a análise NCSI ?
For NCSI over RMII, the REF_CLK is 50 MHz, requiring a sample rate of at least 200 MHz. For NCSI over MCTP, the sample rate depends on the underlying MCTP transport (SMBus or Ethernet). NC-SI commands are relatively infrequent, but the transport interface must be sampled fast enough for reliable physical-layer decoding.
Por que meu BMC não consegue configurar a NIC via NC-SI?
NC-SI configuration failures often stem from incorrect package or channel selection, unsupported command codes for the NIC firmware version, or physical-layer connectivity issues on the sideband interface. Capture the NC-SI traffic during BMC initialization to see the command sequence and identify which command receives an error response. Verify that the NIC supports the NC-SI commands being sent and that the package/channel IDs match the hardware configuration.
Quantos canais são necessários para a análise de NCSI ?
For NCSI over RMII: 6-7 channels (TXD[1:0], RXD[1:0], REF_CLK, TX_EN, CRS_DV). For NCSI over MCTP using SMBus: 2 channels (SDA, SCL). The required channel count is determined by the physical transport, not the NC-SI protocol layer itself.

Protocolos relacionados

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