YD/T 4464-2023
Network functions virtualization (NFV) three-layer decoupling virtual layer technical requirements (English Version)

Standard No.

YD/T 4464-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Post and Telecommunication  CN  /  YD

Latest

YD/T 4464-2023

Introduction

NFV virtual layer architecture analysis

According to the ETSI reference architecture, the NFVI virtual layer includes two core components: Hypervisor and VIM, and realizes hardware resource abstraction through standard interfaces such as Vi-Ha and Nf-Vi. The key technical features include:

Architecture level	Functional module	Key technology
Compute virtualization	KVM/Qemu	NUMA affinity, CPU core binding
Storage virtualization	Cinder	Multi-path access, QoS speed limit
Network virtualization	OVS/DPDK	SR-IOV, VxLAN transparent transmission

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Core performance indicators

The standard puts forward strict requirements on the performance of the virtual layer:

• Computing loss: CPU/memory performance loss must be <5% under SPECCPU test
• Network throughput: 10GE network card OVS forwarding throughput > 4Gbps (64-byte packet)
• Fault recovery: VM HA time <30 seconds, node fault recovery <3 minutes

Typical configuration example

An operator's vEPC deployment adopts:

• Computing nodes: 2*Intel Skylake 36 cores/512GB memory
• Storage configuration: Ceph cluster 3 replica strategy
• Network plane: 25GE SR-IOV network card + DPDK acceleration

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Reliability design points

The virtual layer needs to achieve 99.999% availability. Key measures include:

1. Multi-level redundancy: odd-number deployment of management nodes (3/5-node cluster)
2. Fault isolation: network plane division (independent management/business/storage)
3. Quick recovery: black box log + WatchDog dual detection mechanism

Implementation suggestions

Note in actual deployment:

• Hypervisor reserved resource control (CPU < 2 cores, memory < 32GB)
• Disable the security group function to improve forwarding performance
• Preferably use virtio-blk disk type

YD/T 4464-2023 history

• 2023 YD/T 4464-2023 Network functions virtualization (NFV) three-layer decoupling virtual layer technical requirements

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