PLDM Protocolos suportados

Computadores e servidores

Platform Level Data Model over MCTP

O que é PLDM?

PLDM (Platform Level Data Model) is a DMTF specification that defines structured data formats and message commands for platform management functions transported over MCTP. PLDM covers sensor monitoring and events, firmware update, BIOS configuration, and Redfish Device Enablement (RDE). It provides the application-layer semantics that BMCs and managed devices use to exchange telemetry, perform firmware updates, and manage platform configuration. Engineers debugging server and data center platform management need PLDM decode to verify sensor readings, firmware update sequences, event handling, and configuration parameter exchanges between the BMC and managed components.

PLDM Referência rápida

type Packet-based
signals MCTP transport
features DMTF platform management data model

Instrumentos Acute compatíveis com PLDM

Série TravelLogic

Série TravelLogic
Série LA4000

Série LA4000

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Como analisar PLDM com instrumentos Acute

1

Conecte seu analisador lógico Acute a interface de transporte MCTP transportando trafego PLDM.

2

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

3

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

4

Configure o decodificador para MCTP transport binding and PLDM message type of interest.

5

Capture e visualize os PLDM messages showing command types, sensor readings, completion codes, and data payloads.

Perguntas frequentes

Qual taxa de amostragem e necessária para a análise PLDM ?
PLDM is an application-layer protocol carried over MCTP, so the sample rate requirement is determined by the underlying transport. For SMBus MCTP, 2-4 MHz is sufficient. For Ethernet MCTP, match the PHY interface speed requirements. PLDM messages themselves are relatively infrequent, but firmware update transfers can be sustained, requiring adequate capture depth.
Por que minha atualização de firmware PLDM falha no meio da transferência?
PLDM firmware update uses a multi-step sequence: RequestUpdate, GetPackageData, PassComponentTable, UpdateComponent, and ActivateFirmware. A failure mid-transfer often indicates a timeout, transfer error, or component table mismatch. Capture the MCTP bus during the firmware update to decode PLDM messages and identify which command received an error completion code and at what point in the sequence the failure occurred.
Quantos canais são necessários para a análise de PLDM ?
Channel requirements are the same as for the underlying MCTP transport. For SMBus: 2 channels. For Ethernet: 6-12 channels depending on the interface. PLDM adds no additional physical signals beyond what MCTP and its transport require.

Protocolos relacionados

MCTP Control SPDM

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