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CHT IPv6 Measurement and

Deployment

Chia-Wei TsengChunghwa Telecom

2015.09.09

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Agenda Chunghwa Telecom Profile IPv6 Measurements in Taiwan IPv6 Deployment Status of Chunghwa Telecom Chunghwa Telecom IPv6 Deployment experience Summary

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Chunghwa Telecom Profile

Subscribers in Major Services

Broadband Service(FTTx/xDSL)

4,509,516

Mobile Service(2G/3G/4G)

11,189,288

An Integrated Telecom Operator Employees: 23,287 (Aug. 2015)

Capital : NT$ 77,574,465,450

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Agenda Chunghwa Telecom Profile IPv6 Measurements in Taiwan IPv6 Deployment Status of Chunghwa Telecom Chunghwa Telecom IPv6 Deployment experience Summary

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IPv6 Measurements in Taiwan

ISO-3166 Code

Internet Users

IPv6 Use ratio IPv6 Users(Est) Population Country

TW 18706330 0.498% 93228 23382913 Taiwan

Index IPv6 Users(Est) Country1 72062824 United States of America2 15805239 Germany3 11741449 Japan

Index IPv6 Use ratio Country1 42.51% Belgium2 25.85% Switzerland3 19.92% United States of America

Top 3 in the world

Taiwan IPv6 Ranking IPv6 User ratio: 45th IPv6 User(Est)： 35th

Source:Google IPv6 Adoption Source:AKAMAI

Source:APNIC

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IPv6 Measurements in Taiwan

Source:APNIC

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Agenda Chunghwa Telecom Profile IPv6 Measurements in Taiwan IPv6 Deployment Status of Chunghwa Telecom Chunghwa Telecom IPv6 Deployment experience Summary

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2007 2009 2010 2011 2012 2013 2014 2017

HiNet IDC Center Support IPv6

HiNet Launched IPv6 Tunnel Broker Trial

Service

HiNet Obtained“IPv6 Enabled SP

Logo”

CHT participated in World IPv6 Day

CHTTL IPv6 Testing Lab participated the government’s “Next Generation Internet Interoperability Certification Program”

(2009-2012)

HiNet Launched FTTx/Dual Stack IPv6

Trial Service

CHT supportgovernment IPv6 GSN

network Project

CHT Participated in World IPv6

Launch

CHT IPv6 Major Milestones

PWLAN and LTE IPv6 trial run

HiNet online E-service provide

IPv6 application

HiNet Launched FTTx/Dual Stack IPv6

Service

CHT released the IPv6 White Paper

HiNet, ISP of CHT (Chunghwa Telecom, NYSE:CHT)

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CHT IPv6 deployment status Network status

Backbone and access network is IPv6 capable

International Networking HiNet has established IPv6 networking with the world's leading ISP and ICP

operators, including AT & T,Verizon, Sprint, TeliaSonera, HE, NTT, FT,KDDI, PCCW, SingTel, StarHub, Google, Facebook…,etc.

Domestic and TWIX interconnection HiNet has provided IPv6 traffic exchange (TWIXv6) for other Taiwan

ISP operators, including GSN, TANET, TWAREN, TWGATE…,etc.

CHT IPv6 Exchange

Description numbers

International Networking Numbers of interconnection with international ISPs

42

Domestic Networking(including TANET and ISP)

Numbers of interconnection with Domesticl ISPs

5

TWIX interconnectionNumbers of interconnection with Domesticl

ISPs(TWIX)9

10

2008~ Future2004~20072001~2004Dedicated Frame-Relay IPv6

NetworkDedicated GE IPv6 Network Commercial Dual Stack Network

All POPs support IPv6 dual stack service

HiNet Dual Stack Network

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HiNet IPv6 exchange status

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HiNet Backbone(Dual Stack)

InternetISP 1 ISP N

Domestic Peering(Dual Stack)

International Peering

(Dual Stack)

Access Network(Dual Stack)

HiChannel videoHiNet Mail HiNet e-AdvertisementHiNet e-Mall

Dual Stack Services

HiNet IPv6 Deployment

IDC Data Center(Dual Stack)

TWIX(Dual Stack)

HiNet is the first ISP to obtain IPv6 Enabled Logo in Taiwan

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IPv6 services in CHT HiNet IPv6 Native Access Service

For leased line users. Users must prepare a router and connected to HiNet IPv6 with leased line.

 IPv6 Configured Tunnel Service For HiNet IPv4 users with fixed IP address.

Users can set up a configured tunnel with HiNet tunnel server.

 Tunnel Broker Service For all HiNet IPv4 users. Users need to install

TB client software to set up dynamic tunnel with HiNet tunnel broker.

FTTx IPv6/IPv4 Dual Stack Service For HiNet FTTx users. There are two different types.

Fixed types: The OS of CPE must support SLAAC(RFC4862).Non-fixed types: The OS of CPE must support IPv6 PPPoE.

HiNet is currently in pre-commerical Fiber to the Home(FTTx) IPv4/IPv6 services stage

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IPv6 services in CHT HiNet HiNet DNS and domain name hosting service are

IPv6 ready HiNet Mail, HiNet Internet advertising, HiNet digital

mall and other services are supported IPv6 All of HiNet IDC POP is dual stack now Online e-service for IPv6 application is available

http://ipv6.taco.hinet.netIt’s free service for IPv6 users.

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IPv6 Testing Service in CHT-TL CHT-TL (Chunghwa Telecom Laboratories, the R&D lab

under Chunghwa Telecom)  Established in 2003, the IPv6 Ready Logo Accredited Lab in Taiwan Test Capabilities Include:IPv6

Core、 IPSec、 DHCPv6、 SNMPv2C and CE Router

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Agenda Chunghwa Telecom Profile IPv6 Measurements in Taiwan IPv6 Deployment Status of Chunghwa Telecom Chunghwa Telecom IPv6 Deployment experience Summary

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IPv6 interconnection with ICP is not equal to IPv4

ex： Taiwan YAHOO

YAHOO TWHiNet

Dual Stack User (IPv6 first)

Server

IPv4 (shorter path)

IPv6(longer path)

Transit Provider

Dual Stack Web server

Domestic interconnection(IPv4 Only)

Foreign Interconnection(支援 IPv6)

Case1 :QoE-IPv6 routing problem

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Case1 :QoE-IPv6 routing problem

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Case2 :QoE-ICP DNS problem

Client prefers IPv6 over IPv4. Twice the load on the DNS CAPEX is added

IPv4 Only IPv4/IPv6 dualstack

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Case3:QoE-IPv6 Partially-deployed environment

IPv6/IPv4 fallback problem Problem is especially significant in TCP-based applications 

使用者 test.ipv6.tw

1. IPv6 first

DNS ServerIPv6 add resolution

test.ipv6.twA IPv4 =1.1.1.1AAAA IPv6 = 2001::1

2. Try IPv4

Est 20 secs Network or Server problem

User： IPv4/IPv6DNS : IPv4/IPv6Network : Not IPv6 readyServer : Not IPv6 ready

IPv4/IPv6

DNS provide server’s IPv6 address Client is IPv4/IPv6 dualstack

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Case4: CPE IPv6 issues Not all CPE Support IPv6 MTU Size issue

Carrier IPv4 and IPv6

NetworkLayer 2 Access

VLANIPv4 and / or IPv6 devices

BNTBridged-Mode IPv4/IPv6 Edge Router

(B-RAS)

WAN port MTU=1492(PPPoE)LAN port default MTU=1500

CPE

Server1500 Bytes Packets

Packet Too Big (PTB)

RA(MTU should be1492)

Issue 1End user CPE does not support IPv6 over PPPoE

Issue 2The IPv6 MTU advertised on Ethernet interfaces

should be 1492 bytes in PPPoE environments

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Agenda Chunghwa Telecom Profile IPv6 Readiness in Taiwan IPv6 Deployment Status of Chunghwa Telecom Chunghwa Telecom IPv6 Deployment experience Summary

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Summary IPv6 has minor flaws, which are enough to give bad impressions to

users IPv6 routing path, ICP DNS problem, fallback problem and CPE IPv6

support..,etc. ISP/ICP should ensure that new equipment and software they

purchase is IPv6 ready The transition from IPv4 to IPv6 will be a significant network

changeover and a milestone in the history of the internet CHT Provided the FTTx based IPv6/IPv4 dual stack trial services

since 2011 Becoming IPv6-ready is a key part of CHT plans for wider 4G LTE

and PWLAN network deployments

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