ETSI TS 103 241-3 V1.1.1 (2014-12)

Integrated broadband cable telecommunication networks (CABLE); Testing; Conformance test specifications for DS-Lite technology; Part 3: Abstract Test Suite (ATS) and Protocol Implementation eXtra Information for Testing (PIXIT)

DTS/CABLE-00013-3

General Information

• Status: Published
• Publication Date: 07-Dec-2014
• Technical Committee: CABLE WG4 - Network, Fault, Monitoring and Performance Management and Test & Measu
• Current Stage: 12 - Completion
• Due Date: 07-Dec-2014
• Completion Date: 08-Dec-2014

Standards Content (Sample)

ETSI TS 103 241-3 V1.1.1 (2014-12)






TECHNICAL SPECIFICATION
Integrated broadband cable
telecommunication networks (CABLE);
Testing; Conformance test specifications
for DS-Lite technology;
Part 3: Abstract Test Suite (ATS) and
Protocol Implementation eXtra Information for Testing (PIXIT)

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2 ETSI TS 103 241-3 V1.1.1 (2014-12)



Reference
DTS/CABLE-00013-3
Keywords
AFTR, ATS, CPE, DS-Lite, IP, IPv6, transition
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ETSI

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3 ETSI TS 103 241-3 V1.1.1 (2014-12)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 7
4 Abstract test method . 8
4.1 Abstract protocol tester . 8
4.2 Test configurations . 9
4.2.1 CF01: B4 as IUT . 9
4.2.2 CF02: AFTR as IUT . 10
4.3 TTCN-3 Test architecture. 10
4.4 Ports and ASPs (Abstract Services Primitives) . 13
4.4.1 TTCN-3 ports. 13
4.4.2 Abstract Service Primitives . 13
5 Implemented Test Purposes . 13
6 ATS conventions . 14
6.1 Naming conventions . 14
6.1.1 General guidelines . 14
6.1.2 DS-LITE specific TTCN-3 naming conventions . 15
6.1.3 Usage of Log statements . 16
6.1.4 Test Case (TC) identifier . 16
6.2 On line documentation . 17
Annex A (normative): Partial PIXIT proforma for DS-LITE . 18
A.1 Identification summary. 18
A.2 ATS summary . 18
A.3 Test laboratory . 18
A.4 Client identification . 19
A.5 SUT . 19
A.6 Protocol layer information. 19
A.6.1 Protocol identification . 19
A.6.2 IUT information . 20
Annex B (normative): PCTR Proforma for DS-Lite . 21
B.1 Identification summary. 21
B.1.1 Protocol conformance test report . 21
B.1.2 IUT identification . 21
B.1.3 Testing environment . 21
B.1.4 Limits and reservation . 22
B.1.5 Comments. 22
B.2 IUT Conformance status . 22
B.3 Static conformance summary . 22
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4 ETSI TS 103 241-3 V1.1.1 (2014-12)
B.4 Dynamic conformance summary . 23
B.5 Static conformance review report . 23
B.6 Test campaign report . 24
B.7 Observations . 25
Annex C (normative): TTCN-3 library modules . 26
C.1 Electronic annex, zip file with TTCN-3 code . 26
Annex D (informative): Bibliography . 27
History . 28

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5 ETSI TS 103 241-3 V1.1.1 (2014-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Integrated broadband cable
telecommunication networks (CABLE).
The present document is part 3 of a multi-part deliverable covering the conformance test specification for DS-Lite
technology.
Part 1: "Protocol Implementation Conformance Statement (PICS) proforma";
Part 2: "Test Suite Structure and Test Purposes (TSS&TP)";
Part 3: "Abstract Test Suite (ATS) and Protocol Implementation eXtra Information for Testing (PIXIT)".
The development of the present document follows the guidance provided in the ETSI EG 202 798 [i.1]. Therefore this
ATS documentation is also based on the guidance provided in ETSI EG 202 798 [i.1].
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "need not", "will",
"will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms
for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
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6 ETSI TS 103 241-3 V1.1.1 (2014-12)
1 Scope
The present document contains the Abstract Test Suite (ATS) for DS-Lite technology as defined in RFC 6333 [1] and
addressing specific cable industry requirements as defined in ETSI TS 101 569-1 [11] in compliance with the relevant
requirements and in accordance with the relevant guidance given in ISO/IEC 9646-7 [5].
The objective of the present document is to provide a basis for conformance tests for DS-Lite technology equipment
giving a high probability of inter-operability between different manufacturer's equipment.
The ISO standard for the methodology of conformance testing (ISO/IEC 9646-1 [2] and ISO/IEC 9646-2 [3]) as well as
the ETSI rules for conformance testing (ETSI ETS 300 406 [6]) are used as a basis for the test methodology.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] IETF RFC 6333: "Dual-Stack Lite Broadband Deployments Following IPv4 Exhaustion".
[2] ISO/IEC 9646-1 (1994): "Information technology -- Open Systems Interconnection --
Conformance testing methodology and framework -- Part 1: General concepts".
[3] ISO/IEC 9646-2 (1994): "Information technology -- Open Systems Interconnection --
Conformance testing methodology and framework -- Part 2: Abstract Test Suite specification".
[4] ISO/IEC 9646-6 (1994): "Information technology -- Open Systems Interconnection --
Conformance testing methodology and framework -- Part 6: Protocol profile test specification".
[5] ISO/IEC 9646-7 (1995): "Information technology -- Open Systems Interconnection --
Conformance testing methodology and framework -- Part 7: Implementation Conformance
Statements".
[6] ETSI ETS 300 406 (1995): "Methods for testing and Specification (MTS); Protocol and profile
conformance testing specifications; Standardization methodology".
[7] ETSI ES 201 873-1: "Methods for Testing and Specification (MTS); The Testing and Test Control
Notation version 3; Part 1: TTCN-3 Core Language".
[8] Void.
[9] Void.
[10] ETSI TS 103 241-2: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for DS-Lite technology; Part 2: Test Suite Structure and Test
Purposes (TSS&TP)".
[11] ETSI TS 101 569-1: "Integrated Broadband Cable Telecommunication Networks (CABLE); Cable
Network Transition to IPv6; Part 1: IPv6 Transition Requirements".
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7 ETSI TS 103 241-3 V1.1.1 (2014-12)
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EG 202 798: "Intelligent Transport Systems (ITS); Testing; Framework for conformance and
interoperability testing".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in ETSI TS 101 569-1 [11],
ISO/IEC 9646-1 [2] and ISO/IEC 9646-7 [5] apply.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply.
3GPP Third Generation Partnership Project
AFTR Address Family Transition Router
ASP Abstract Services Primitives
ATM Abstract Test Method
ATS Abstract Test Suite
B4 (DS-Lite) Basic Bridging BroadBand element
CPE Customer Premises Equipment
DHCP Dynamic Host Configuration Protocol
DNS Domain Name System
FTP File Transfer Protocol
GRT Global Routing Table
HTML HyperText Markup Language
HTTP HyperText Transfer Protocol
IP Internet Protocol
IPv4 IP version 4
IPv6 IP version 6
IUT Implementation Under Test
MSS Maximum Segment Size
MTC Main Test Component
MTS Methods for Testing and Specification
OSI Open System Interconnection
PA Platform Adaptor
PDU Protocol Data Unit
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation Extra Information for Testing
PTC Parallel Test Component
SUT System Under Test
TA Test Adaptor
TC Test Case
TCP Transmission Control Protocol
TP Test Purpose
TSS Test Suite Structure
TTCN Testing and Test Control Notation
VRF Virtual Routing and Forwarding
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8 ETSI TS 103 241-3 V1.1.1 (2014-12)
4 Abstract test method
This clause describes the ATM used to test the DS-Lite technology.
4.1 Abstract protocol tester
An abstract protocol tester presented in figure 1 is a process providing the test behaviour for testing an IUT. Thus it will
emulate an entity which is capable of proving the IUT functionalities. This type of test architecture provides a situation
of communication which is equivalent to real operation between real devices. The test system will simulate valid and
invalid behaviours, and will analyse the reaction of the IUT. Then the test verdict, e.g. pass or fail, will depend on the
result of this analysis. Thus this type of test architecture enables to focus the test objective on the IUT behaviour only.
In order to access an IUT, the corresponding abstract protocol tester needs to use lower layers to establish a proper
connection to the system under test (SUT) over a physical link (Lower layers link).

Figure 1: Generic abstract protocol tester
The "Protocol Data Units" (PDUs) are the messages exchanged between the IUT and the abstract protocol tester which
permits to trigger the IUT and to analyse its reactionThe result of the analysis allows to assign the test verdict.
Further control actions on the IUT may be necessary from inside the SUT, for instance to simulate a primitive from the
upper layer or the management/security entity. Further details on such control actions are provided by means of an
upper tester presented in clause 4.3.
The above "Abstract Test Method" (ATM) is well defined in ISO/IEC 9646-1 [2] and supports a wide range of
approaches for testing including the TTCN-3 abstract test language [7].
The abstract protocol tester used for DS-Lite test suite is described in figure 2. The test system will send and receive IP
packets, by using other upper layer protocols such as DHCP, DNS and FTP, in order to analyse DS-Lite functionality.
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9 ETSI TS 103 241-3 V1.1.1 (2014-12)
Test System System Under Test
DS-Lite
Functionality
DNS/DHCP/
FTP/HTTP/etc*
IP packets
IPv4/IPv6 IPv4/IPv6
Ethernet Ethernet
Lower Layers Link

NOTE: * Those protocols are used to prove certain DS-Lite functionalities.

Figure 2: Abstract Protocol Tester - DS-Lite
4.2 Test configurations
The test suite for DS-Lite uses two test configurations in order to cover the different test scenarios. Distinction between
the two configurations is given by the two main components in DS-Lite, which are B4 and AFTR.
4.2.1 CF01: B4 as IUT
In this configuration, the B4 is the IUT and the test system simulates an AFTR in one side and a IPv4 host in the other
side.
Test system (TTCN-3)
Host -
Simulated
B4 - IUT
AFTR -
Simulated

Figure 3: CF01, B4 equipment is the IUT
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10 ETSI TS 103 241-3 V1.1.1 (2014-12)
4.2.2 CF02: AFTR as IUT
In this configuration, the AFTR is the IUT and the test system simulates a B4 equipment in one side and an IPv4 host in
the other side.
Test system (TTCN-3)
Host -
Simulated
AFTR -
IUT
B4/Host -
Simulated

Figure 4: CF02, AFTR equipment is the IUT
4.3 TTCN-3 Test architecture
In general, a conformance test system architecture based on TTCN-3 is as figure 5 shows.
DS-Lite Test System SUT
Codec Test control Upper tester application
DS-Lite Abstract Test Suite Upper tester
DS-Lite IUT
transport
Test adaptor
Upper tester DS-Lite lower DS-Lite lower
Layers
transport Layers
Lower layer transport link
Upper tester transport link

Figure 5: Global test architecture
The "System Under Test" (SUT) contains:
• The "Implementation Under Test" (IUT), i.e. the object of the test.
• The "Upper tester application" enables to trigger or capture some actions (i.e. higher layer service primitives)
on the IUT.
• The "DS-Lite lower layers" enable to establish a proper connection to the system under test (SUT) over a
physical link (Lower layer transport link).
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11 ETSI TS 103 241-3 V1.1.1 (2014-12)
• The "Upper tester transport" is a functionality, which enables the test system to communicate with the upper
tester application. Then the upper tester can be controlled by a TTCN-3 test component as part of the test
process.
The "DS-Lite test system" contains:
• The "TTCN-3 test components" are processes providing the test behaviour. The test behaviour may be
provided as one single process or may require several independent processes.
• The "Codec" is a functional part of the test system to encode and decode messages between the TTCN-3
internal data representation and the format required by the related base standard.
• The "Test Control" enables the management of the TTCN-3 test execution (parameter input, logs, test
selection, etc.).
• The "Test adaptor" (TA) realizes the interface between the TTCN-3 ports using TTCN-3 messages, and the
physical interfaces provided by the IUT.
Based on the above test architecture, figure 6 shows a detailed test architecture used for the DS-Lite. The DS-Lite ATS
requires using several Parallel Test Components (PTC) dealing with specific communication protocols and a Main Test
Component (MTC) dealing with PTCs' synchronization. The different test components communicate with the DS-Lite
SUT over several ports (described in clause 4.4) which are used to exchange protocol messages between the test
components and the DS-Lite IUT.
The Upper tester entity enables triggering some functionalities by simulating actions or primitives from above
applications.
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12 ETSI TS 103 241-3 V1.1.1 (2014-12)
DS-LITE TTCN-3 ATS
DHCPv6 Http Ftp
component component component
Sync
Sync
port
DS-Lite port
component
(sync)
Upper tester / AFTR Monitoring Hosts DNS
external functions component component component
components
control
UT
port
Test Adaptor (TA)*
CODECS
FTP HTTP
IPv4 IPv6 DHCP DNS
IPv4
IPv6 Ftp Dns
IPv4 Dhcpv6 Http
port
port port port
port port port

External Upper Tester DS-Lite lower layers stack
functions Transport

Platform Adaptor (PA) System Adaptor (SA)
IPv4
UT IPv6

port
port port

NOTE: *Test Adaptor (TA) is out of scope.

Figure 6: DS-Lite TTCN-3 test architecture
The following protocol test components are available. Each of these components can be mapped to either a "Main Test
Component" (MTC), when only one component shall be executed, or to a "Parallel Test Component" (PTC), if several
components shall be used.
• AFTR: This component simulates an AFTR entity and its functionality.
• HOST: These components simulate one or more hosts (one component per host).
• MONITORING: This component is used to monitor traffic from the IUT.
• DNS: This component simulates a DNS Client.
• DHCP: This component simulates a DHCPv6 Client.
• FTP: This component simulates a FTP client.
• HTTP: This component simulates a HTTP client.
The Sync component is mapped to the MTC and is used to trigger and synchronize the PTCs in order to orchestrate the
test environment executed by the PTCs. In addition, it starts and terminates the test cases.
The upper tester external functions control represents the functions which the protocol test components may use to
control the upper tester which is located in the SUT. These functions may use either external functions or dedicated
messages and a dedicated port to realise synchronization. These functions can be executed in the protocol test
components.
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13 ETSI TS 103 241-3 V1.1.1 (2014-12)
4.4 Ports and ASPs (Abstract Services Primitives)
4.4.1 TTCN-3 ports
The DS-Lite Test Suite implements the following ports:
• Ipv6Port, to send and receive IPv6 packets.
• Ipv4Port, to send and receive IPv4 packets.
• DnsPort, to send and receive DNS messages.
• Dhcpv6Port, to send and receive DHCPv6 messages.
• FtpPort, to trigger the following FTP actions: login, logout, and data sending (both IPv4 and IPv6). It can
monitor incoming traffic.
• HttpPort, to trigger the following HTTP actions: data sending (both IPv4 and IPv6). It can monitor incoming
traffic.
• UtPort, included in order to be able to stimulate the IUT and receive extra information from IUT upper layers
(it is not used in the current implementation and is provided for future expansion).
4.4.2 Abstract Service Primitives
Abstract service primitives are commands or actions that need to be performed on the IUT in order to trigger certain
behaviour or to obtain information about the IUT state.
The list of ASP used in the DS-Lite ATS is shown in table 1.
Table 1. DS-Lite Abstract Service Primitives
TTCN-3 text Action/Command Description
Are routing tables configured GRT upstream Action To check that routing tables are
ingress & VRF upstream egress? properly configured
Is Gateway Prefix withdrawn? Action To check that the gateway prefix is
withdrawn
Remove the route Command To remove the route from IUT routing
tables
Remove the cache Command To remove the IUT cache

5 Implemented Test Purposes
Table 2 shows the test purposes from ETSI TS 103 241-2 [10] which have been implemented and included in the
present document.
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14 ETSI TS 103 241-3 V1.1.1 (2014-12)
Table 2: Implemented Test Purposes
TP Identifier TC Identifier Group Subgroup PICS Untestable Implemented
TP/DSLITE/B4/GWA/BV/001 TC_DSLITE_B4_GWA_BV_01 PICS_ROLE_IS_B4 Yes

Gateway
TP/DSLITE/B4/GWA/BV/002 TC_DSLITE_B4_GWA_BV_02 PICS_ROLE_IS_B4 Yes
Assignment
TP/DSLITE/B4/GWA/BV/003 TC_DSLITE_B4_GWA_BV_03 PICS_ROLE_IS_B4 Yes

TP/DSLITE/B4/BF/BV/001 TC_DSLITE_B4_BF_BV_01 Basic Function PICS_ROLE_IS_B4 Yes
B4
TP/DSLITE/B4/FRAG/BV/001 TC_DSLITE_B4_FRAG_BV_01 PICS_ROLE_IS_B4 Yes
Fragmentation
TP/DSLITE/B4/FRAG/BV/002 TC_DSLITE_B4_FRAG_BV_02 PICS_ROLE_IS_B4 Yes

Maximum
TP/DSLITE/B4/MSS/BV/002 TC_DSLITE_B4_MSSC_BV_01 PICS_ROLE_IS_B4 Yes
Segment Size
TP/DSLITE/AFTR/BF/BV/001 TC_DSLITE_AFTR_BF_BV_01 PICS_ROLE_IS_AFTR Yes

TP/DSLITE/AFTR/BF/BV/002 TC_DSLITE_AFTR_BF_BV_02 Basic Function PICS_ROLE_IS_AFTR Yes

TP/DSLITE/AFTR/BF/TI/001 TC_DSLITE_AFTR_BF_TI_01 PICS_ROLE_IS_AFTR Yes

Application
TP/DSLITE/AFTR/ALG/BV/001 TC_DSLITE_AFTR_ALG_BV_01 PICS_ROLE_IS_AFTR Yes
Layer Gateway
AFTR
TP/DSLITE/AFTR/RT/BV/001 TC_DSLITE_AFTR_RT_BV_01 PICS_ROLE_IS_AFTR Yes

Routing Tables
TP/DSLITE/AFTR/RT/BV/002 TC_DSLITE_AFTR_RT_BV_02 PICS_ROLE_IS_AFTR Yes

TP/DSLITE/AFTR/AW/VB/01 TC_DSLITE_AFTR_AW_BV_01 PICS_ROLE_IS_AFTR Yes
Address

TP/DSLITE/AFTR/AW/VB/02 TC_DSLITE_AFTR_AW_BV_02 Withdrawal PICS_ROLE_IS_AFTR Yes

TP/DSLITE/AFTR/FRAG/VB/01 TC_DSLITE_AFTR_FRAG_BV_01 Fragmentation PICS_ROLE_IS_AFTR Yes


6 ATS conventions
The ATS conventions are intended to give a better understanding of the ATS but they also describe the conventions
made for the development of the ATS. These conventions shall be considered during any later maintenance or further
development of the ATS.
6.1 Naming conventions
This test suite follows the naming convention guidelines provided in ISO/IEC 9646-6 [4] and ETSI EG 202 798 [i.1].
6.1.1 General guidelines
The naming convention is based on the following underlying principles:
• Identifiers should be prefixed with a short alphabetic string (specified in table 3) indicating the type of
TTCN-3 element it represents.
• Suffixes should not be used except in those specific cases identified in table 3.
• Prefixes and suffixes should be separated from the body of the identifier with an underscore ("_").
EXAMPLE 1: c_sixteen, t_wait.
• Only module names, data type names and module parameters should begin with a
...