ETSI TS 103 443-6 V1.1.1 (2016-08)

Integrated broadband cable telecommunication networks (CABLE); IPv6 Transition Technology Engineering and Operational Aspects; Part 6: 6RD

DTS/CABLE-00018-6

General Information

• Status: Published
• Publication Date: 30-Aug-2016
• Technical Committee: CABLE WG4 - Network, Fault, Monitoring and Performance Management and Test & Measu
• Current Stage: 12 - Completion
• Due Date: 01-Aug-2016
• Completion Date: 31-Aug-2016

Standards Content (Sample)

ETSI TS 103 443-6 V1.1.1 (2016-08)






TECHNICAL SPECIFICATION
Integrated broadband cable
telecommunication networks (CABLE);
IPv6 Transition Technology Engineering and
Operational Aspects;
Part 6: 6RD

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2 ETSI TS 103 443-6 V1.1.1 (2016-08)



Reference
DTS/CABLE-00018-6
Keywords
cable, HFC, IPv6

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3 ETSI TS 103 443-6 V1.1.1 (2016-08)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 8
4 General Considerations . 10
4.1 Background . 10
4.2 General Overview. 11
4.3 Vendor Considerations . 11
5 Gap Analysis . 12
5.1 Consideration . 12
5.2 Overview . 12
6 Domain Functionality . 13
6.1 End to End Network Domains . 13
6.2 CPE Home Network Domain . 13
6.3 Access Network Domain . 14
6.4 Core Network Domain . 14
6.5 Data Centre Domain . 14
6.6 DMZ Service Domain . 14
6.7 Transit and Peering Service Domain . 14
6.8 Management and Monitoring Domain . 15
6.9 Security Domain . 15
7 Technical Considerations . 15
7.1 Hardware . 15
7.2 MTU and fragmentation . 15
7.3 Reliability . 16
7.4 Quality of Service . 16
8 LSN and CPE Requirements . 16
8.1 General . 16
8.2 LSN . 16
8.3 CPE . 17
9 6RD Feature Requirements . 17
10 Network node Requirements . 20
10.1 BR Network node Hardware Feature and Topology . 20
10.2 Network node specific requirements . 20
10.2.1 General considerations . 20
10.2.2 Integrated topology requirements . 20
10.2.3 Hairpin topology requirements . 22
10.3 Scalability . 23
10.4 Performance . 23
History . 25


ETSI

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4 ETSI TS 103 443-6 V1.1.1 (2016-08)
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 (https://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 6 of a multi-part deliverable. Full details of the entire series can be found in part 1 [20].
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "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.
Introduction
Considering the depletion of IPv4 addresses, transition to IPv6 is required in order to enable continued growth of the
customer base connected to cable networks and ensure service continuity for existing and new customers. High-quality
connectivity to all kinds of IP-based services and networks is essential in today's business and private life.
The present document accommodates an urgent need in the industry to implement and integrate the IPv6 transition
technologies as specified by ETSI TS 101 569-1 [1] into their cable networks. The choice of the technology
implemented depends on factors such as the business needs, current deployed architectures and plans for cost
effectively transition from IPv4 to IPv6.
Current global IPv4 address space was projected to be depleted around the middle of 2012; depletion for the operator
was estimated around end 2012. As part of the resulting roll-out of IPv6 in the operator's network, specific measures
had to be taken to allow a smooth transition and coexistence between IPv4 and IPv6. ETSI developed requirements to
address transition from IPv4 to IPv6 specifying six transition technologies as given by ETSI TS 101 569-1 [1] that were
at the time considered to be the most appropriate to assist cable operators to transition there cable networks to IPv6.
Since then the industry has acquired more experience with the technology options settling in the main for DS-Lite
across the cable network market and NAT64 IPv6 transition technologies across the mobile market.
The objective of the present document is to define the operational and engineering requirements to enable engineers to
implement a seamless transition of the cable networks to IPv6 with the application of the 6RD transition technology.
The present document is the final part of a companion of ETSI standards developed in 4 phases to provide the cable
sector in particular cable operators engineering and operational staff a standardized approach when integrating one of
the five IPv6 transition technologies, NAT64, DS-Lite, 464XLAT, 6RD and MAP-E.
ETSI

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5 ETSI TS 103 443-6 V1.1.1 (2016-08)
The first phase assessed the different IPv6 transition technology options being defined by industry with
recommendation for the most appropriate with consideration of current network architectures, ensuring adequate scale
and a cost effective transition approach from IPv4 to IPv6 as the IPv4 addresses deplete. The objective being to
examine the pros and cons of the IPv6 transition technologies and recommend the most cost effective solution that
would enable the cable operators to minimize the cost of upgrades to their existing network plant whilst maintain
continuity of services to their present and new added customers. The details of the study are given by ETSI
TR 101 569 [i.2].
In the second phase an ETSI technical specification was developed to specify technical requirements for six transition
technologies that industry were considering for use by Cable Operators depending on the current state of their deployed
cable network architecture, service model requirements and their IPv6 transition strategy as the IPv4 addresses depleted.
These six IPv6 transition technologies are specified by ETSI TS 101 569-1 [1], covering NAT64, DSLite, 6RD,
NAT44, 464XLAT and MAP-E.
In the third phase ETSI developed a series of conformance test specifications to enable the compliance verification of
the five IPv6 transition technologies, NAT64, DS-Lite, 464XLAT, 6RD and MAP-E that were specified during phase 2
standardization. The conformance tests are developed against the requirements given by the ETSI TS 101 569-1 [1].
The series of conformance tests developed for each of the four transition technologies, are as given by ETSI
TS 103 238 parts 1 [2] and to 3 [4] respectively for NAT64; ETSI TS 103 239 parts 1 [5] to 3 [7] respectively for MAP-
E; ETSI TS 103 241 parts 1 [8] to 3 [10] respectively for DS-Lite; ETSI TS 103 242 parts 1 [11] to 3 [13] respectively
for XLAT and ETSI TS 103 243 parts 1 [14] to 3 [16] respectively for 6RD.
Phase 4 is the present project phase for development of technical specifications covering the operational and
engineering requirements with the present document being Part 6 of a multi-part series covering the IPv6 transition
technology 6RD.
®
DOCSIS is a registered Trade Mark of Cable Television Laboratories, Inc., and is used in the present document with
permission.


ETSI

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6 ETSI TS 103 443-6 V1.1.1 (2016-08)
1 Scope
The present document presents the engineering and operational requirements for the application of the IPv6 transition
technology 6RD as defined by ETSI TS 101 569-1 [1] (IPv6 Transition Requirements) implemented within an
integrated broadband cable network end to end across its network domains.
The present document is Part 6 of a multi-part series and presents the operational aspects of the IPv6 transition
technology 6RD across the cable network domains.
Only those elements of the network that have to be engineered to operate the IPv6 transition technology 6RD are
presented. Descriptions and interface details of network elements that do not change are already addressed by the
relevant equipment cable standards and therefore this information is not included in the present document.
The conformity of the 6RD implementation is relevant when assessing its implementation and operational requirements
across the cable network to ensure the implementation is correctly engineered to conform to the requirements of the
base standard ETSI TS 101 569-1 [1]. These conformance tests are not specified in the present document as they are
already specified by ETSI TS 103 243 parts 1 [14] to 3 [16].
The operational aspects for the IPv6 transition technology 6RD are considered when engineered end to end across the
cable network domains;
• CPE Home Networking Domain
• Access Network Domain
• Core Network Domain
• Data Centre Domain
• DMZ Service Domain
• Transit and Peering Domain
• Management and Monitoring Domain
• Security Domain
The present document specifies the requirements to be considered when the defined IPv6 transition technology 6RD is
engineered across the cable network domains.
2 References
2.1 Normative 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
referenced 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.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 101 569-1: "Integrated Broadband Cable Telecommunication Networks (CABLE); Cable
Network Transition to IPv6 Part 1: IPv6 Transition Requirements".
ETSI

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7 ETSI TS 103 443-6 V1.1.1 (2016-08)
[2] ETSI TS 103 238-1: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for NAT64 technology; Part 1: Protocol Implementation
Conformance Statement (PICS) proforma".
[3] ETSI TS 103 238-2: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for NAT64 technology; Part 2: Test Suite Structure and Test
Purposes (TSS&TP)".
[4] ETSI TS 103 238-3: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for NAT64 technology; Part 3: Abstract Test Suite (ATS) and
Protocol Implementation eXtra Information for Testing (PIXIT)".
[5] ETSI TS 103 239-1: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for MAP-E technology; Part 1: Protocol Implementation
Conformance Statement (PICS) proforma".
[6] ETSI TS 103 239-2: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for MAP-E technology; Part 2: Test Suite Structure and Test
Purposes (TSS&TP)".
[7] ETSI TS 103 239-3: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for MAP-E technology; Part 3: Abstract Test Suite (ATS) and
Protocol Implementation eXtra Information for Testing (PIXIT)".
[8] ETSI TS 103 241-1: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for DS-Lite technology; Part 1: Protocol Implementation
Conformance Statement (PICS) proforma".
[9] 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)".
[10] ETSI TS 103 241-3: "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)".
[11] ETSI TS 103 242-1: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for 464XLAT technology; Part 1: Protocol Implementation
Conformance Statement (PICS) proforma".
[12] ETSI TS 103 242-2: "Integrated broadband cable telecommunication networks (CABLE) Testing;
Conformance test specifications for 464XLAT technology; Part 2: Test Suite Structure and Test
Purposes (TSS&TP)".
[13] ETSI TS 103 242-3: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for 464XLAT technology; Part 3: Abstract Test Suite (ATS) and
Protocol Implementation eXtra Information for Testing (PIXIT)".
[14] ETSI TS 103 243-1: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for 6rd technology; Part 1: Protocol Implementation Conformance
Statement (PICS) proforma".
[15] ETSI TS 103 243-2: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for 6rd technology; Part 2: Test Suite Structure and Test Purposes
(TSS&TP)".
[16] ETSI TS 103 243-3: "Integrated broadband cable telecommunication networks (CABLE); Testing;
Conformance test specifications for 6rd technology; Part 3: Abstract Test Suite (ATS) and
Protocol Implementation eXtra Information for Testing (PIXIT)".
[17] IETF RFC 5969: "IPv6 Rapid Deployment on IPv4 Infrastructures (6rd) -- Protocol Specification".
[18] IETF RFC 4459 (April 2006): "MTU and Fragmentation Issues with In-the-Network Tunneling".
[19] IETF RFC 2983 (October 2000): "Differentiated Services and Tunnels".
ETSI

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8 ETSI TS 103 443-6 V1.1.1 (2016-08)
[20] ETSI TS 103 443-1: "Integrated broadband cable telecommunication networks (CABLE); IPv6
Transition Technology Engineering and Operational Aspects; Part 1: General".
[21] IETF RFC 4787: "Network Address Translation (NAT) Behavioral Requirements for Unicast
UDP".
[22] IETF RFC 5382: "NAT Behavioral Requirements for TCP".
[23] IETF RFC 5508: "NAT Behavioral Requirements for ICMP".
2.2 Informative 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
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
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] CableLabs.
NOTE: Available at http://www.cablelabs.com/specs/.
[i.2] ETSI TR 101 569: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; Cable Network Transition to IPv6".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
4in6: encapsulation of IPv4 packets within IPv6 packet format
NAT44: network address translation from an IPv4 address to another IPv4 address
P Router: label switching router acting as a transit router in the core network of an MPLS network
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
6PE IPv6 Provider Edge
6RD IPv6 Rapid Deployment
6VPE IPv6 VPN Provider Edge
AAA Authentication, Authorization and Accounting
ALG Application Layer Gateway
AMPS Amplifiers
AS Autonomous System
ASCII American Standard Code for Information Interchange
ASIC Application Specific Integrated Circuit
B4 Basic Bridging BroadBand element
BFD Bidirectional Forwarding Detection
BGP Boarder Gateway Protocol
BNG Broadband Network Gateway
BR Boarder Routers
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9 ETSI TS 103 443-6 V1.1.1 (2016-08)
CDP Cisco Discovery Protocol
CE Customer Edge
CEF Cisco Express Forwarding
CMTS Cable Modem Termination System
CoPP Control Plane Policing
CPE Customer Premises Equipment
CPU Central Processing Unit
DAD Duplicate Address Detection
dCEF distributed Cisco Express Forwarding
DCU Destination Class Usage
DHCP Dynamic Host Configuration
DMZ Demilitarised Zone
DNS Domain Name System
DOCSIS 3.0 Data over Cable System Interface Specification version 3.0
DR Data Retention
DSCP Differentiated Services Code Point
DS-Lite Dual Stack-Lite
ECMP Equal-Cost-Multi-Path
ESM Enterprise Subscriber Management
FTP File Transfer Protocol
GRT Global Routing Table
GW Gateway
GW GateWay
HA High Availability
HFC Hybrid Fibre Coax
HSRP Hot Standby Router Protocol
ICMP Internet Control Message Protocol
ID IDentifier
IGP Interior Gateway Protocol
IMIX Internet Mix
IP Internet Protocol
IPFIX IP Flow Information Export
IPv4 IP version 4
IPv6 IP version 6
IRB Integrated Routing and Bridging
ISIS Intermediate System to Intermediate System
ISP Internet Service Provider
ISSU In-Service Software Upgrade
IXPE Internet Exchange Provider Edge
L2 Layer 2
LAN Local Area Network
LDP Label Distribution Protocol
LI Lawful Intercept
LLDP Link Layer Discovery Protocol
LSN Large Scale NAT
MAP-E Mapping of Address and Port - Encapsulation mode
MFIB Multicast Forwarding Information Base
MLD/L2 Multicast Listener Discovery / Layer 2
MLD/L2 Multicast Listener Discovery/ Layer 2
MP BGP MultiProtocol Boarder Gateway Protocol
MP MultiProtocol
MPLS MultiProtocol Label Switching
MSS Maximum Segment Size
MSTP Multiple Spanning Tree Protocol
MT Multi-Topology
MTU Maximum Transmission Unit
NAT Network Address Translation
NAT44 Network Address Translation IPv4 to IPv4
NAT64 Network Address Translation IPv6 to IPv4
NCC Network Coordination Center
ND Neighbour Discovery
NDP Neighbour Discovery Protocol
ETSI

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10 ETSI TS 103 443-6 V1.1.1 (2016-08)
NFv9 Netflow Version 9
NPU Network Processing Unit
NSF/GR Non-Stop Forwarding Graceful Restart
NTP Network Time Protocol
NUD Neighbour Unreachability Detection
OAM Operation, Administration and Maintenance
PCP Port Control Protocol
PE Provider Edge
PIM Protocol Independent Multicasting
PPTP Point-to-Point Tunneling Protocol
PPTP Point-to-Point Tunnelling Protocol
PS-BGP Pretty Secure Boarder Gateway Protocol
QoS Quality of Service
QPPB QoS Policy Propagation via Boarder Gateway Protocol
RADIUS Remote Authentication Dial-In User Service
RDT Reliable Data Transfer
RG Residential Gateway
RIPE NCC Réseaux IP Européens Network Coordination Centre
RIPE Réseaux Internet Protocol Européens
RIR Regional Internet Registry
RSTP Rapid Spanning Tree Protocol
RTCP Real-Time Transmission Control Protocol
RTP Real-Time Protocol
RTSP Real-Time Streaming Protocol
SCU Source Class Usage
SEND Secure Neighbour Discovery
SIP Session Initiated Protocol
SNMP Simple Network Management Protocol
SSH Secure SHell
SSO Stateful SwitchOver
SVI Switched Virtual Interface
SYSLOG Syslog Protocol
TACACS Terminal Access Controller Access Control System
TCP Transmission Control Protocol
UDP User Datagram Protocol
VLAN Virtual LAN
VPLS Virtual Protocol Local Area Network Service
VPN Virtual Private Network
VRF Virtual Routing and Forwarding
VRRP Virtual Router Redundancy Protocol
XLAT transLATor
XML eXtensible Markup Language
4 General Considerations
4.1 Background
The present document is part of a series of ETSI technical specifications specifying requirements to engineer and
operate the 6RD transition technology end to end across a cable operator's network. Its implementation would ensure
the network provider can continue to provide business continuity throughout the depletion of publicly routable IPv4
addresses and the subsequent rollout and migration to IPv6 in the operator's network.
To aid this transition some sectors of industry are currently evaluating 6RD as their chosen technology to mitigate the
gap and lack of integration and compatibility between IPv4 and IPv6.
ETSI

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11 ETSI TS 103 443-6 V1.1.1 (2016-08)
4.2 General Overview
An objective of deploying the IPv6 transition technology is to provide a seamless experience to users accessing IPv6
network services through IPv4 only networks and to enable current and new content to be delivered seamlessly to IPv6
users by encapsulating the IPv6 to IPv4 (6RD).
It should be noted that Cable broadband access networks may vary in build and design with characteristics
...