GB/T 44887.5-2024 IPv6演进技术要求 第5部分：基于IPv6段路由（SRv6）的虚拟专用网（VPN）

ICS

33.040.40

CCS

L78

中华人民共和国国家标准

GB/T44887.5—2024

IPv6演进技术要求

第5部分：基于IPv6段路由（SRv6）的

虚拟专用网（VPN）

IPv6evolutiontechnicalrequirements—

Part5：SRv6﹘basedVPN

2024-11-28发布2025-03-01实施

国家市场监督管理总局发布

国家标准化管理委员会

GB/T44887.5—2024

目次

前言

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Ⅲ

引言

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Ⅳ

1

范围

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2

规范性引用文件

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3

术语和定义

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4

缩略语

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1

5

基于SRv6的VPN网络技术架构

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2

6

SRv6服务TLV技术要求

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3

6.1

SRv6服务TLV

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3

6.2

SRv6服务子TLV

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4

6.3

SRv6SID信息子TLV

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4

6.4

SRv6服务数据Sub﹘Sub﹘TLV

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5

6.5

SRv6SID结构Sub﹘Sub﹘TLV

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5

7

基于SRv6VPN网络的三层服务

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6

7.1

三层服务实现机制

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6

7.2

IPv4VPN服务

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7.3

IPv6VPN服务

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7

7.4

全球可寻址IPv4服务

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7.5

全球可寻址IPv6服务

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8

基于SRv6VPN网络的二层服务

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8

8.1

二层服务实现机制

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8

8.2

以太网自动发现路由

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8.3

MAC/IP通告路由

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8.4

泛组播以太网标签路由

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8.5

以太网分段路由

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8.6

IP前缀路由

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8.7

EVPN组播路由

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9

协议消息错误的处理

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12

参考文献

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13

Ⅰ

GB/T44887.5—2024

前言

本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规

定起草。

本文件是GB/T44887《IPv6演进技术要求》的第5部分，GB/T44887已经发布了以下部分：

—第5部分：基于IPv6段路由（SRv6）的虚拟专用网（VPN）；

—第10部分：支持IP网络切片的增强型虚拟专用网（VPN+）；

—第11部分：IPv6随流检测技术。

请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。

本文件由中华人民共和国工业和信息化部提出。

本文件由全国通信标准化技术委员会（SAC/TC485）归口。

本文件起草单位：中国电信集团有限公司、中国联合网络通信集团有限公司、华为技术有限公司、

中兴通讯股份有限公司、中国信息通信科技集团有限公司、新华三技术有限公司。

本文件主要起草人：龚霞、万晓兰、伍佑明、朱永庆、毛健炜、刘尧、庞冉、彭书萍、张征、汪俊芳、

杨冰。

Ⅲ

GB/T44887.5—2024

引言

根据《关于加快推进互联网协议第六版（IPv6）规模部署和应用工作的通知》，为加快政务应用改

造、拓展行业融合应用，推动IPv6规模部署和应用创新成果标准化，我国制定了一系列IPv6标准。其

中，GB/T44887《IPv6演进技术要求》是为规范国家IPv6部署而制定的标准，拟分为以下部分。

—第1部分：参考架构。目的在于规定IPv6演进技术在运营商和行业领域的应用场景，以及在运

营商及行业网络中的部署。

—第2部分：基于IPv6段路由（SRv6）的IP承载网络。目的在于规定基于SRv6的IP承载网络总体

架构、基于SRv6的设备层技术要求及基于SRv6的管控层技术要求。

—第3部分：IPv6段路由报文头（SRH）。目的在于规定IPv6段路由报文头（SRH）的格式，以

及SRH在节点处理的技术要求。

—第4部分：基于IPv6段路由（SRv6）的网络编程。目的在于规定基于SRv6网络编程的数据平

面、控制平面、管理平面。

—第5部分：基于IPv6段路由（SRv6）的虚拟专用网（VPN）。目的在于规定基于SRv6的

VPN网络的处理流程和协议消息，包含三层服务和二层服务等实现。

—第6部分：IPv6段路由（SRv6）策略（Policy）。目的在于规定用于支持基于SRv6策略技术

的网络设备的开发、设计和测试等。

—第7部分：基于IPv6段路由（SRv6）的业务链。目的在于规定基于SRv6的业务链数据面技术要

求、基于SRv6的业务链控制面技术要求。

—第8部分：基于IPv6段路由（SRv6）的报文头压缩。目的在于规定适用于支持基于SRv6的报文

头压缩的网络设备的开发、设计和测试等。

—第9部分：基于IPv6段路由（SRv6）的网络故障保护。目的在于规定适用于SRv6组网下常见网

络故障场景，包括SRv6BE节点/链路失效、SRv6Policy中间节点/尾节点失效、微环及SRv6

Policy故障场景等。

—第10部分：支持IP网络切片的增强型虚拟专用网（VPN+）。目的在于规定增强型虚拟专用

网（VPN+）的技术架构、VPN+技术要求，以及基于SR的VPN+实现流程。

—第11部分：IPv6随流检测技术。目的在于规定适用于多类型业务承载场景下数据面随流信息的

自动化质量测量，以及IP网络设备随流检测功能研发、测试与部署。

Ⅳ

GB/T44887.5—2024

IPv6演进技术要求

第5部分：基于IPv6段路由（SRv6）的

虚拟专用网（VPN）

1范围

本文件规定了基于SRv6的VPN网络技术架构、SRv6服务TLV、基于SRv6VPN网络的三层服

务、基于SRv6VPN网络的二层服务等技术要求。

本文件适用于网络设备的SRv6VPN技术研发、测试与应用。

2规范性引用文件

下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文

件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用

于本文件。

IETFRFC2545BGP﹘4多协议扩展在IPv6域间路由的应用（UseofBGP﹘4MultiprotocolExten﹘

sionsforIPv6Inter﹘DomainRouting）

IETFRFC4659IPv6VPN场景中的BGP﹘MPLSIP虚拟私有网络扩展[BGP﹘MPLSIPVirtual

PrivateNetwork（VPN）ExtensionforIPv6VPN]

IETFRFC7432基于BGPMPLS的EVPN（BGPMPLS﹘BasedEthernetVPN）

IETFRFC8950通告带有IPv6下一跳地址的IPv4网络层可达性信息[AdvertisingIPv4Network

LayerReachabilityInformation（NLRI）withanIPv6NextHop]

IETFRFC8986SRv6网络编程（SRv6NetworkProgramming）

IETFRFC9136EVPN中的IP前缀通告（IPPrefixAdvertisementinEVPN）

IETFRFC9251EVPN的IGMP和MLD代理[InternetGroupManagementProtocol（IGMP）

andMulticastListenerDiscovery（MLD）ProxiesforEthernetVPN（EVPN）]

IETFRFC9256分段路由策略架构（SegmentRoutingPolicyArchitecture）

3术语和定义

下列述术语和定义适用于本文件。

3.1

分段路由segmentrouting

应用于MPLS网络或者IPv6网络的实现业务路径定制的源路由技术。

注：在MPLS网络中，Segment被编码为MPLS标签。在IPv6网络中，Segment采用IPv6地址格式，通过分段路由

头（SegmentRoutingHeader）指示转发路径。

4缩略语

下列缩略语适用于本文件。

AFI：地址族标志（AddressFamilyIdentifier）

1