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GB/T 44887.5-2024: IPv6 evolution technical requirements - Part 5: SRv6-based VPN
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Basic data

Standard ID GB/T 44887.5-2024 (GB/T44887.5-2024)
Description (Translated English) IPv6 evolution technical requirements - Part 5: SRv6-based VPN
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard L78
Classification of International Standard 33.040.40
Word Count Estimation 18,190
Date of Issue 2024-11-28
Date of Implementation 2025-03-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 44887.5-2024: IPv6 evolution technical requirements - Part 5: SRv6-based VPN


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IPv6 evolution technical requirements - Part 5.SRv6-based VPN Technical Requirements for IPv6 Evolution Part 5.Segment Routing over IPv6 (SRv6) Virtual Private Network (VPN) IPv6 evolution technical requirements- Part 5.SRv6-based VPN ICS 33.040.40 CCS L 78 National Standard of the People's Republic of China Released on 2024-11-28 2025-03-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface ... Ⅲ Introduction ... Ⅳ 1 Scope ... 1 2 Normative references ... 1 3 Terms and Definitions ... 1 4 Abbreviations ... 1 5 SRv6-based VPN network technology architecture ... 2 6 SRv6 Service TLV Technical Requirements ... 3 6.1 SRv6 Service TLV 3 6.2 SRv6 Service Sub-TLV 4 6.3 SRv6 SID Information Sub-TLV 4 6.4 SRv6 Service Data Sub﹘Sub﹘TLV ... 5 6.5 SRv6 SID structure Sub﹘Sub﹘TLV ... 5 7 Layer 3 services based on SRv6 VPN network ... 6 7.1 Three-layer service implementation mechanism ... 6 7.2 IPv4 VPN Service ... 7 7.3 IPv6 VPN Service ... 7 7.4 Globally Addressable IPv4 Services ... 7 7.5 Globally Addressable IPv6 Services ... 8 8 Layer 2 services based on SRv6 VPN network ... 8 8.1 Layer 2 Service Implementation Mechanism ... 8 8.2 Ethernet Automatic Routing Discovery ... 9 8.3 MAC/IP Advertisement Routing ... 9 8.4 Flood Multicast Ethernet Label Routing ... 10 8.5 Ethernet Segment Routing ... 11 8.6 IP Prefix Routing ... 11 8.7 EVPN Multicast Routing ... 12 9 Handling of protocol message errors ... 12 References ... 13

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting is required. This document is Part 5 of GB/T 44887 Technical Requirements for IPv6 Evolution. GB/T 44887 has published the following parts. Part 5.Virtual Private Network (VPN) based on IPv6 Segment Routing (SRv6);- Part 10.Enhanced Virtual Private Network (VPN) supporting IP network slicing; - Part 11.IPv6 flow detection technology. - Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This document is under the jurisdiction of the National Communications Standardization Technical Committee (SAC/TC 485). This document was drafted by. China Telecom Corporation Limited, China Unicom Group Co., Ltd., Huawei Technologies Co., Ltd., ZTE Corporation, China Information and Communications Technology Group Corporation, and H3C Technologies Co., Ltd. The main drafters of this document are. Gong Xia, Wan Xiaolan, Wu Youming, Zhu Yongqing, Mao Jianwei, Liu Yao, Pang Ran, Peng Shuping, Zhang Zheng, Wang Junfang, Yang Bing.

Introduction

According to the Notice on Accelerating the Large-Scale Deployment and Application of Internet Protocol Version 6 (IPv6), in order to accelerate the improvement of government application my country has formulated a series of IPv6 standards to create and expand industry integrated applications, promote the large-scale deployment of IPv6 and standardize innovative application results. Among them, GB/T 44887 "Technical Requirements for IPv6 Evolution" is a standard formulated to regulate the national IPv6 deployment and is intended to be divided into the following parts. Part 1.Reference Architecture. The purpose is to define the application scenarios of IPv6 evolution technology in operators and industry fields, as well as the Deployment in business and industry networks. Part 2.IP bearer network based on IPv6 segment routing (SRv6). The purpose is to specify the overall IP bearer network based on SRv6. Architecture, SRv6-based device layer technical requirements, and SRv6-based control layer technical requirements. Part 3.IPv6 Segment Routing Header (SRH). The purpose is to specify the format of the IPv6 Segment Routing Header (SRH). and technical requirements for SRH processing at the node. Part 4.Network programming based on IPv6 segment routing (SRv6). The purpose is to specify the data plane based on SRv6 network programming. plane, control plane, and management plane. Part 5.Virtual Private Network (VPN) based on IPv6 Segment Routing (SRv6). The processing flow and protocol messages of the VPN network include the implementation of Layer 3 services and Layer 2 services. Part 6.IPv6 Segment Routing (SRv6) Policy. The purpose is to define the technology used to support SRv6 policy. Development, design and testing of network equipment. Part 7.Service chain based on IPv6 segment routing (SRv6). The purpose is to specify the data plane technical requirements of service chain based on SRv6. Requirements and technical requirements for the service chain control plane based on SRv6. Part 8.Header compression based on IPv6 Segment Routing (SRv6). The purpose is to specify the header compression applicable to supporting SRv6-based packets. Development, design and testing of network equipment with header compression. Part 9.Network Fault Protection Based on IPv6 Segment Routing (SRv6). The purpose is to specify the common network fault protection applicable to SRv6 networking. Network failure scenarios, including SRv6 BE node/link failure, SRv6 Policy intermediate node/end node failure, micro-ring and SRv6 Policy failure scenarios, etc. Part 10.Enhanced Virtual Private Network (VPN) supporting IP network slicing. The purpose is to specify enhanced virtual private The technical architecture of VPN, VPN technical requirements, and VPN implementation process based on SR. Part 11.IPv6 flow detection technology. The purpose is to specify the data plane flow information applicable to multi-type service carrying scenarios. Automated quality measurement, as well as development, testing and deployment of IP network equipment flow detection functions. Technical Requirements for IPv6 Evolution Part 5.Segment Routing over IPv6 (SRv6) Virtual Private Network (VPN)

1 Scope

This document specifies the SRv6-based VPN network technology architecture, SRv6 service TLV, and three-layer service based on SRv6 VPN network. services, and Layer 2 services based on SRv6 VPN networks. This document applies to the development, testing, and application of SRv6 VPN technology for network devices.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies. in this document. IETF RFC 2545 Use of BGP﹘4 Multiprotocol Extensions for IPv6 Inter-Domain Routing sions for IPv6 Inter﹘Domain Routing） IETF RFC 4659 BGP﹘MPLS IP Virtual Private Network Extensions in IPv6 VPN Scenario Private Network (VPN) Extension for IPv6 VPN] IETF RFC 7432 BGP MPLS-Based Ethernet VPN (BGP MPLS-Based Ethernet VPN) IETF RFC 8950 Advertising IPv4 Network Layer Reachability Information with IPv6 Next-Hop Addresses Layer Reachability Information (NLRI) with an IPv6 Next Hop] IETF RFC 8986 SRv6 Network Programming IETF RFC 9136 IP Prefix Advertisement in EVPN IETF RFC 9251 IGMP and MLD Proxy for EVPN [Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Proxies for Ethernet VPN (EVPN)] IETF RFC 9256 Segment Routing Policy Architecture

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Segment routing Source routing technology applied to MPLS or IPv6 networks to implement service path customization. Note. In an MPLS network, the segment is encoded as an MPLS label. In an IPv6 network, the segment uses the IPv6 address format and is routed through segment routing. The Segment Routing Header indicates the forwarding path.

4 Abbreviations

The following abbreviations apply to this document. AFI. Address Family Identifier ...

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