YD/T 4408-2023
Cloud metropolitan area network reference architecture and technical requirements (English Version)
- Standard No.
- YD/T 4408-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- Professional Standard - Post and Telecommunication CN / YD
- Latest
- YD/T 4408-2023
- Introduction
Standard Background and Technology Evolution
With the development of emerging services such as 5G and cloud computing, traditional metropolitan area networks are facing problems such as closed BRAS equipment and low resource utilization. This standard introduces SDN/NFV technology to achieve network function decoupling and build a new cloud-based metropolitan area network through separation of control and forwarding and resource pooling.
Core Architecture Design
Architecture Levels Traditional MAN Cloud MAN Networking Architecture Tree Topology Spine-Leaf Architecture Bearing Technology MPLS VPN SRv6/EVPN Network Element Form Specialized Hardware VNF+PNF Hybrid Typical Application Scenarios
An Operator Adopts After implementing the vBRAS solution, the service provisioning cycle was shortened from 7 days to 2 hours, and equipment utilization increased by more than 40%.
Key Technical Requirements
1. Node Cloud Technology
- Access Node: Support MAC Learning/Traffic Management
- Service Gateway: Control Plane Implements User/Address Management
2. SDN Controller Interface
Interface Type Protocol Support Function Northbound Interface RESTful Service Orchestration Southbound Interface NetConf/BGP-LS Device Control
Implementation Suggestions
- Phase-based evolution: Prioritize transformation of BRAS equipment and gradually promote access layer cloudification
- Hybrid networking: VNF and PNF coexistence solution is adopted during the transition period
- Protocol simplification: Unified deployment of SRv6 to replace traditional MPLS
YD/T 4408-2023 history
- 2023 YD/T 4408-2023 Cloud metropolitan area network reference architecture and technical requirements
Topics on standards and specifications
Standard and Specification
DIN ETS 300211:1993 Network Aspects (NA); Metropolitan Area Network (MAN); principles and architecture; English version ETS 300211:1992
IEEE 802.10A-1999 Local and Metropolitan Area Networks Interoperable LAN/MAN Security (SILS) Security Architecture Framework IEEE Computer Society Document; Supplement to 802.10
ISO/IEC/IEEE 8802-A:2015 Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Overview and Architecture
ISO/IEC 5021-1:2023 Telecommunications and information exchange between systems — Wireless LAN access control — Part 1: Networking architecture
IEEE 8802-A-2015 Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Overview and Architecture (IEEE
KMK 2.05.04-1997 Construction Norms and Rules for Metros
BS ISO/IEC/IEEE 8802-1AX:2021 Telecommunications and exchange between information technology systems. Requirements for local and metropolitan area networks - Link aggregation
DS/ETS 300211:1993 Network Aspects (NA). Metropolitan Area Network (MAN). Principles and architecture
IEEE 802-2001 Standard for Local and Metropolitan Area Networks: Overview and Architecture IEEE Computer Society Document
IEEE Std 802-2001 IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture