Chunghwa Telecom has made significant strides in deploying IPv6 services in Taiwan, having launched various trials and services since 2007. As of 2015, Taiwan ranks 45th in IPv6 user ratio globally, with Chunghwa Telecom being the first ISP to obtain an IPv6 enabled logo in the country. The company emphasizes the importance of transitioning to IPv6 to support the advancement of network technologies and services.

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Chia-Wei Tseng
Chunghwa Telecom
2015.09.09

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

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

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ISO-3166
Code
Internet
Users
IPv6 Use
ratio
IPv6 Users(Est) Population Country
TW 18706330 0.498% 93228 23382913 Taiwan
Index IPv6 Users(Est) Country
1 72062824 United States of America
2 15805239 Germany
3 11741449 Japan
Index IPv6 Use ratio Country
1 42.51% Belgium
2 25.85% Switzerland
3 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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Source:APNIC

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 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 support
government IPv6 GSN
network Project
CHT Participated
in World IPv6
Launch
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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 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 interconnection
Numbers of interconnection with Domesticl
ISPs(TWIX)
9

10. 10
2008~ Future2004~20072001~2004
Dedicated Frame-Relay IPv6
Network
Dedicated GE IPv6 Network Commercial Dual Stack Network
All POPs support IPv6 dual stack service

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HiNet Backbone(Dual Stack)
Internet
ISP 1 ISP N
Domestic Peering
(Dual Stack)
International
Peering
(Dual Stack)
Access Network
(Dual Stack)
HiChannel video
HiNet Mail
HiNet e-
Advertisement
HiNet e-Mall
Dual Stack Services
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 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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 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.net
It’s free service for IPv6 users.

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 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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 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)

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 Client prefers IPv6 over IPv4. Twice the load on the DNS
 CAPEX is added
IPv4 Only IPv4/IPv6 dualstack

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 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.tw
A IPv4 =1.1.1.1
AAAA IPv6 = 2001::1

2. Try IPv4
Est 20 secs Network or Server problem
User：IPv4/IPv6
DNS : IPv4/IPv6
Network : Not IPv6 ready
Server : Not IPv6 ready
IPv4/IPv6
 DNS provide server’s IPv6 address
 Client is IPv4/IPv6 dualstack

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 Not all CPE Support IPv6
 MTU Size issue
Carrier
IPv4 and IPv6 Network
Layer 2
Access
VLANIPv4 and / or IPv6
devices
BNT
Bridged-Mode IPv4/IPv6 Edge Router
(B-RAS)
WAN port MTU=1492(PPPoE)
LAN port default MTU=1500
CPE
Server
RA(MTU should be1492)
Issue 1
End user CPE does not support IPv6 over PPPoE
Issue 2
The IPv6 MTU advertised on Ethernet interfaces
should be 1492 bytes in PPPoE environments

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

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 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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