NCSI Protocolos compatibles

Computadoras y servidores

Network Controller Sideband Interface over MCTP/RMII

¿Qué es 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 Referencia rápida

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

Instrumentos Acute compatibles con NCSI

¿Listo para analizar este protocolo?

Vea cómo los instrumentos Acute capturan y decodifican este protocolo en tiempo real. Solicite una demo o contacte a nuestro equipo.

¿Cómo analizar NCSI con instrumentos Acute

1

Conecte su analizador lógico Acute a la interfaz de transporte NC-SI (señales RMII entre BMC y NIC, o señales de transporte MCTP).

2

Conecte un cable de tierra a la referencia de tierra de la placa objetivo.

3

En el software Acute, seleccione el NCSI protocol decoder y asigne las señales de interfaz a los canales de entrada correspondientes.

4

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

5

Capture y visualice los NC-SI commands and responses showing command types, channel/package IDs, and payload data.

Preguntas frecuentes

Que tasa de muestreo necesito para el análisis 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 mi BMC no logra configurar la NIC a través de NC-SI?
NC-SI configuration failures often stem from incorrect package or channel selection, unsupported command codes for the NIC firmware versión, 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.
Cuantos canales se necesitan para el análisis 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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