Testing methods for SDH-based MSTP embedded with MPLS
1 Scope
This standard specifies the testing methods for the functions, performance and network management system of MSTP embedded with MPLS, including the testing requirements and passing criteria that nodes shall meet in data plane functions, control plane functions, MPLS layer performance, L2VPN applications and MPLS layer network management technologies, etc.
This standard is applicable to SDH devices embedded with MPLS, to realize L2VPN Ethernet service and also used to test Multi-Service Transport Platform (MSTP) with unified network management system.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
YD/T 1022-1999 Requirement of synchronous digital hierarchy (SDH) equipment function
YD/T 1238-2002 Technical requirements for SDH multi-service transport platform
YD/T 1276-2003 Testing methods of SDH multi-service transport platform
YD/T 1345-2005 Technical requirements for SDH-based MSTP embedded with RPR
YD/T 1346-2005 Test specifications for SDH-based MSTP embedded with RPR
YD/T 1474-2006 Technical requirements of Multi-Service Transport Platform (MSTP)based on SDH - Embedded with MPLS function
YDN 099-1998 Synchronous optical transport network technology system (internal standard)
ITU-T Y.1711 Operation & maintenance mechanism for MPLS networks
IEEE 802.3-2005 Carrier sense multiple access mode with collision detection and physical layer definition
3 Abbreviations
For the purposes of this standard, the following abbreviations apply.
AF Assured Forwarding
BDI Backward Defect Indication
BE Best Effort
CoS Class of Service
CR-LDP Constraint Based Routing LDP
CV Packet Connectivity Verification Packet
EF Expedited Forwarding
EVPL Ethernet Virtual Private Line
EVPLAN Ethernet Virtual Private Local Area Network
FCS Frame Check Sequence
FDI Forward Defect Indication
FFD Fast Failure Detection
FS Forced Switch
GFP Generic Framing Procedure
HDLC High Level Data Link Control
LAPS Link Access Procedure SDH
LDP Label Distribution Protocol
LOCV Loss of Connectivity Verification
LSP Label Switched Path
LSR Label Switching Router
MAC Media Access Control
MPLS Multiprotocol Label Switching
MS Manual Switch
MSTP Multi-Service Transport Platform
NNI Network to Network/Network Node Interface
OAM Operations, Administration and Maintenance
QoS Quality of Service
P Provider
PE Provider Edge
PPP Point-to-Point Protocol
PS Protection Switching
PW Pseudo-Wire
RPR Resilient Packet Ring
RSVP Resource Reservation Protocol
SDH Synchronous Digital Hierarchy
SD Signal Degrade
SF Signal Fail
TE Traffic Engineering
TTL Time to Live
TTSI Trail Termination Source Identifier
UNI User-Network Interface
VCG Virtual Concatenation Group
VLAN Virtual Local Area Network
VPN Virtual Private Network
VSI Virtual Switch Instance
WTR Wait To Restore
4 Model of MSTP embedded with MPLS
This standard defines SDH-based MSTP embedded with MPLS as a Multi-Service Transport Platform based on SDH platform, embedded with MPLS function and providing unified network management system. Its key feature is that Ethernet service adapts to the MPLS layer and then maps to SDH channel for transport, or Ethernet service adapts to the MPLS layer, then maps to the RPR layer, and then to the SDH channel for transport. MSTP embedded with MPLS shall meet the function requirements of YD/T 1238-2002, YD/T 1345-2005 and YD/T 1474-2006.
The functional block model of SDH-based MSTP embedded with MPLS is shown in Figure 1.
Note: The combination of MPLS and RPR is defined in Annex A to YD/T 1474-2006, and RPR MAC layer processing is optional during processing of MPLS layer embedded in MSTP.
Figure 1 Diagram of MSTP embedded with MPLS function
The specific functional requirements for SDH-based MSTP embedded with MPLS are as follows:
a) meeting the basic functional requirements of SDH nodes specified in YD/T 1022-1999 and YDN 099-1998;
b) meeting the basic functional requirements of SDH-based MSTP specified in YD/T 1238-2002;
c) supporting carrying Ethernet services on MPLS, and the its specific functions shall meet the requirements of Clause 5 of YD/T 1474-2006, and the adaptation of Ethernet services to MPLS layer shall comply with the requirements of Clause 7 of YD/T 1474-2006;
d) ensuring the transparency of Ethernet if MPLS carries Ethernet;
e) supporting static LSP assignment mode;
Foreword i
1 Scope
2 Normative references
3 Abbreviations
4 Model of MSTP embedded with MPLS
5 Test instruments
6 SDH test
7 Ethernet test
8 MPLS test
8.1 Data plane function test
8.2 Data plane function test
8.3 Application of MSTP with embedded MPLS - L2VPN test
8.4 Test of performance of MPLS layer
9 Clock test
10 Test of functions of network management system
10.1 Test of functions of element management system
10.2 Test of functions of subnet management system
基于同步数字体系(SDH)的多业务传送节点(MSTP)测试方法
——内嵌多协议标记交换(MPLS)功能部分
1 范围
本标准规定了内嵌MPLS多业务传送节点(MSTP)的功能、性能和网络管理的测试方法,包括节点在数据平面功能、控制平面功能、MPLS层性能、L2VPN应用以及MPLS层网络管理等技术所应达到的测试要求和通过准则。
本标准适用于SDH设备上提供内嵌MPLS功能,实现L2VPN以太网业务,同时提供统一网管的多业务传送节点(MSTP)的测试。
2 规范性引用文件
下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准。然而,鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件,其最新版本适用于本标准。
YD/T 1022-1999 同步数字体系(SDH)设备功能要求
YD/T 1238-2002 基于SDH的多业务传送节点技术要求
YD/T 1276-2003 基于SDH的多业务传送节点测试方法
YD/T 1345-2005 基于SDH的多业务传送节点(MSTP)技术要求——内嵌弹性分组环(RPR)功能部分
YD/T 1346-2005 基于SDH的多业务传送节点(MSTP)测试方法——内嵌弹性分组环(RPR)功能部分
YD/T 1474-2006 基于SDH 的多业务传送节点(MSTP)技术要求——内嵌MPLS功能部分
YDN 099-1998 光同步传送网技术体制(暂行规定)
ITU-T Y.1711 MPLS OAM机制
IEEE 802.3-2005 带碰撞检测的载波监听多重访问方式及物理层定义
3 缩略语
下列缩略语适用于本标准。
AF Assured Forwarding 保障转发
BDI Backward Defect Indication 后向缺陷指示
BE Best Effort 尽力而为
CoS Class of Service 业务分类
CR-LDP Constraint Based Routing LDP 使用约束路由的LDP协议
CV Packet Connectivity Verification Packet 连通性检验包
EF Expedited Forwarding 快速转发
EVPL Ethernet Virtual Private Line 以太网虚拟专线
EVPLAN Ethernet Virtual Private Local Area Network 以太网虚拟专网
FCS Frame Check Sequence 帧校验序列
FDI Forward Defect Indication 前向缺陷指示
FFD Fast Failure Detection 快速失效检测
FS Forced Switch 强制倒换
GFP Generic Framing Procedure 通用成帧规程
HDLC High Level Data Link Control 高级数据链路控制
LAPS Link Access Procedure SDH 链路接入协议SDH
LDP Label Distribution Protocol 标记分发协议
LOCV Loss of Connectivity Verification 连通性检验丢失
LSP Label Switched Path 标记交换路径
LSR Label Switching Router 标记交换路由器
MAC Media Access Control 介质访问控制
MPLS Multiprotocol Label Switching 多协议标记交换
MS Manual Switch 人工倒换
MSTP Multi-Service Transport Platform 多业务传送节点
NNI Network to Network/Network Node Interface 网络(节点)到网络(节点)之间的接口
OAM Operations,Administration and Maintenance 操作、管理、维护
QoS Quality of Service 服务质量
P Provider 运营商核心设备
PE Provider Edge 运营商边缘设备
PPP Point-to-Point Protocol 点对点协议
PS Protection Switching 保护倒换
PW Pseudo-Wire 伪线
RPR Resilient Packet Ring 弹性分组环
RSVP Resource Reservation Protocol 资源预留协议
SDH Synchronous Digital Hierarchy 同步数字体系
SD Signal Degrade 信号劣化
SF Signal Fail 信号失效
TE Traffic Engineering 流量工程
TTL Time to Live 生存时间
TTSI Trail Termination Source Identifier 路径终结源标识
UNI User-Network Interface 用户网络接口
VCG Virtual Concatenation Group 虚容器级联组
VLAN Virtual Local Area Network 虚拟局域网
VPN Virtual Private Network 虚拟专用网
VSI Virtual Switch Instance 虚拟交换实例
WTR Wait To Restore 等待恢复
4 内嵌MPLS的MSTP功能模型
本标准所定义的基于SDH的内嵌MPLS的MSTP是指:基于SDH平台,内嵌MPLS功能,而且提供统一网管的多业务节点(MSTP)。其关键特征为:以太网业务适配到MPLS层,然后映射到SDH通道中传送;也可以是以太网业务适配到MPLS层,然后映射到RPR层,再映射到SDH通道中传送。内嵌MPLS的MSTP应满足YD/T 1238-2002、YD/T 1345-2005、YD/T 1474-2006要求的功能。
内嵌MPLS的基于SDH的MSTP功能块模型如图1所示。
PDH接口
ATM接口
ATM层处理
STM-N接口
以太网接口
二层交换
RPR MAC层处理
VC映射
交叉连接
复用段开销处理
再生段开销处理
MPLS层处理
注:MPLS和RPR结合在YD/T 1474-2006的附录A中定义,在MSTP内嵌MPLS层处理时,RPR MAC层处理为可选功能。
图1 内嵌MPLS功能的MSTP功能框图
对于内嵌MPLS的基于SDH的MSTP,具体的功能要求如下:
a)应满足YD/T 1022-1999和YDN 099-1998中规定的SDH节点基本功能要求;
b)应满足YD/T 1238-2002中规定的基于SDH的多业务传送节点基本功能要求;
c)应支持在MPLS上承载以太网业务,具体的功能要求应遵循YD/T 1474-2006要求第5章的规定,以太网业务适配到MPLS层应遵循YD/T 1474-2006要求第7章的规定;
d)MPLS承载以太网时,应保证以太网的透明性;
e)支持LSP静态指配方式;
f)支持MPLS信令协议动态建立LSP方式(可选);
g)具备MPLS操作管理维护功能(可选);
h)具备MPLS LSP保护功能(可选);
i)提供L2VPN业务;
j)具备在MPLS层按服务等级调度业务的能力;
k)具备将MPLS帧映射到SDH层传送并指配SDH虚容器作为传送通道的功能,应支持采用VC级联通道作为承载业务的传送通道。
本标准定义的PE为具备内嵌MPLS的MSTP网络边缘设备,完成本地业务如以太网业务到MSTP设备封装和适配。P为具备内嵌MPLS的MSTP网络中间设备,支持MPLS标签交换功能。PE和P节点处理功能参考YD/T 1474-2006第5.1节的规定。
5 测试仪表
本标准建议使用目前业界常用的数据网络性能分析仪和SDH测试仪。
所采用的数据网络性能分析仪,10/100Mbit/s以太网电接口符合IEEE 802.3-2005中的10BASE-TX/100BASE-TX标准,支持10/100Mbit/s速率,全双工/半双工自适应,全双工Pause帧流控。GE光接口符合IEEE 802.3-2005标准中吉比特以太网物理层定义。
所采用的SDH测试仪,应支持STM-4、STM-16或者STM-64速率的光接口,支持连续级联和虚级联的格式,提供GFP封装、LAPS封装和HDLC/PPP封装的映射格式的产生和分析。
6 SDH测试
参见《基于SDH的多业务传送节点测试方法》(YD/T 1276-2003)第5章SDH测试。
7 以太网测试
参见《基于SDH的多业务传送节点测试方法》(YD/T 1276-2003)第6章以太网测试。
8 MPLS测试
8.1 数据平面功能测试
8.1.1 MPLS封装格式测试
8.1.1.1 MPLS over GFP封装格式测试
编号:8.1.1.1
测试项目:MPLS over GFP封装格式测试
测试目的:测试设备对MPLS over GFP封装的处理
测试仪表:数据网络性能分析仪、SDH测试仪
测试配置:
SDH测试仪
以太网连接1
以太网连接2
数据网络性能分析仪
测试步骤:
1.如图连接组网配置,SDH测试仪为穿通测试模式;
2.从PE1到PE2建立一条LSP,SDH层VCG封装格式配置GFP封装;
3.建立端口1到端口2的业务连接;
4.从数据网络性能分析仪向PE1发送以太网帧;
5.查看SDH测试仪捕获的GFP帧
预期结果:
SDH测试仪捕获的GFP帧,其封装格式符合MPLS over GFP的定义
测试说明:
8.1.1.2 MPLS over PPP/HDLC封装格式测试(可选)
测试编号:8.1.1.2
测试项目:MPLS over PPP/HDLC封装格式测试
测试目的:测试设备对MPLS over PPP/HDLC封装的处理
测试仪表:数据网络性能分析仪、SDH测试仪
测试配置:
SDH测试仪
以太网连接1
以太网连接2
数据网络性能分析仪