H3C HDM Redfish Technology White Paper-6W100

HomeSupportResource CenterTechnology White PapersH3C HDM Redfish Technology White Paper-6W100
Download Book
Table of Contents
Related Documents


H3C HDM Redfish

Technology White Paper


































Copyright © 2020 New H3C Technologies Co., Ltd. All rights reserved.

No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of New H3C Technologies Co., Ltd.

Except for the trademarks of New H3C Technologies Co., Ltd., any trademarks that may be mentioned in this document are the property of their respective owners.

The information in this document is subject to change without notice.


Overview·· 1

Technical background· 1

Benefits· 1

Protocol 1

HDM Redfish implementation· 1


BIOS configuration items· 2



Redfish provides HTTPS-based RESTful APIs for device management. Each HTTPS operation submits a resource request or retrieves a UTF-8-encoded resource response in JSON format. This is similar to the process that a Web application returns an HTML file to a browser. Redfish reduces development complexity and is easy to implement, easy to use, and easy to extend. You can use the Redfish interface to implement common HDM and BIOS configurations, including user management, server information query, and management module information query.

Redfish is the combination of a REST API and Software-defined servers (data models), and is defined by DMTF at www.dmtf.org.

Technical background

As a widely supported industry standard, IPMI defines a set of APIs to provide out-of-band management and monitoring functions. These functions are independent from the host system's CPU, firmware (legacy BIOS or UEFI), and operating system.

However, IPMI no longer meets the function scalability of modern data center customers as a legacy API with a history of over 20 years. IPMI is limited to a set of lowest common denominator commands (for example, power on/off, restart, temperature reading, and fan speed). Customers can use only a reduced set of functions. In addition, IPMI-capable extensions specific to vendors are not common across the platforms. Therefore, customers have to develop their own tools to implement tool integration, which relies on inband management software.

Trapped by unstandardized IPMI functions and fragments caused by OEM extensions, vendor-specific solutions are demanding function scalability. To resolve this issue, Redfish is introduced. Based on HTTPS and SSL, Redfish aims to provide a simpler, more secure, and more auditable API than IPMI.


As a general management protocol designed for converged infrastructure, Redfish can be easily integrated into commonly used tools to manage converged single-node and multiple-node server infrastructure.


In Redfish, each URL represents a resource, service, or a resource collection. In RESTful terms, Redfish uses URIs to indicate resources in order to implement resource interaction with clients.

The format of resources is defined by the Redfish schema, which can be used by clients to define correct semantics. Redfish semantics are designed to be greatly intuitive.

All resources are linked to the service entry point (the root), which is located at /redfish/v1. Main resource types are structured as collections to support standalone, multi-node, or converged rack server systems. Other resources are contained as members of these collections.

HDM Redfish implementation

Developed based on Redfish v1.5.0, HDM Redfish API can be used to implement HDM and BIOS configuration items such as user management, server information obtaining, and module management.

HDM Redfish API includes HDM API and BIOS API.


Table 1 Redfish features



Chassis management

Displays collection resource information for chassis.

Server power management

Supports power control.

Obtains server power information.

Server resource operations

Obtains information about fans, processors, memory, PCIe modules, expansion modules, UIDs, and network ports.

Configures fans, processors, memory, PCIe modules, expansion modules, UIDs, and network ports.

HDM system resource operations

Supports HDM restart and primary/backup switchover.

Storage management

Obtains RAID controller information.

Creates, deletes, and obtains logical volumes.

Firmware management

Obtains firmware information.

Updates firmware.

Network service

Obtains and configures NTP, SNMP, SMTP, and Syslog.

Session and service management

Creates sessions.

Obtains service information.

HDM user management

Supports user account and user group operations.

BIOS configuration management

Obtains next-boot device and BIOS configuration items.

Edits BIOS password.

Restores the BIOS to the default settings.

Event log report

Configures event subscription resources.


BIOS configuration items

Table 2 BIOS configuration items




ACPI settings.


Terminal settings.

Serial port console redirection.

Legacy USB devices.

XHCI hand-off.

USB mass storage driver.

Option ROM policy.


Media detect count.

Platform Configuration

SATA controller.

USB settings.

Selection of a monitor to display videos.

Debug mode.


Software error injection.

Socket Configuration

CPU core settings.


MONITOR and MWAIT instructions.

Intel TXT.



Hardware prefetcher.

EIST (P-States) settings.


Intel® Speed Select.

EIST PSD Function.

Turbo mode.

Processor core ratio.

Hardware P-states.

Hardware PM interrupt.


CPU C state control.

CPU T-state control.

Thermal monitor.

Power performance tuning.

Server Management

FRB-2 timer.

FRB-2 timer policy.

OS watchdog timer.

OS watchdog timer policy.


Secure boot mode.

Restore factory keys.


Numeric lock status.

Boot mode (UEFI and legacy).

UEFI shell status.

Boot options.


  • Cloud & AI
  • InterConnect
  • Intelligent Computing
  • Security
  • SMB Products
  • Intelligent Terminal Products
  • Product Support Services
  • Technical Service Solutions
All Services
  • Resource Center
  • Policy
  • Online Help
All Support
  • Become a Partner
  • Partner Resources
  • Partner Business Management
All Partners
  • Profile
  • News & Events
  • Online Exhibition Center
  • Contact Us
All About Us