1. Introduction of Tokyo6to4
JANOG23 Kochi
Tokyo6to4 Project
Shin Shirahata
Translation by Akira Kato

2. Motivation Deployment of co-existence technologies of IPv4 and IPv6
Trial IPv6 environment for IPv4 users
Initially focus on 6to4, which has been developed widely
Teredo and ISATAP will be considered.
Deployment of co-existence technologies of IPv4 and IPv6
Share config/operation techniques
Configuration and operational status will be published

3. What is 6to4? A technique to send IPv6 packets over IPv4 network
No explict tunnel configuration required
Require a Global Ipv4 address
Can not be used through a NAT
Maps an IPv4 address to a IPv6 address
In a case of :
2002:c000:022a: (/48)
/80 (*1)
::c000:022a
192 2 42
(*1) Lower 80bit shows an
example of Windows XP SP3

4. Motivation for users
To encourage many IPv4 users to try IPv6 with automatic tunnel techniques such as
6to4, Teredo, ISATAP
6to4 is implemented in Windows XP, Vista, and some broadband routers including AirMac Extreme
6to4 is just a trial environment for introduction phase of IPv6
Until global deployment of production quality IPv6 network
No 6to4 relay router operational in Japan
One operated by KDDI Laboratories ( completed operation in Mar 2006

5. Motivation for Network Operators
Introduction of automatic tunneling as a co- exsiting technique of IPv4 and IPv6
We wish many 6to4 relay routers operational
We wish native IPv6 network widely deployed
Current Project overview
A Dell PE1850 w/ Quagga is used for 6to4 relay
Disclose information for a reference of IPv6 environment operation
Hardware and software configuration
Traffic information
No privacy information is disclosed

6. 6to4 Relay Router and the IPv4/IPv6 Internet
2002::/16
6to4
Relay router
IPv4 host
6to4
Relay router
2002::/16
IPv6 host 2001:db8::1
2002::/16
Tokyo6to4
Relay Router
2002:c000:022a::c000:022a
/24 and 2002::/16 are Anycasted Asymmetric routing results frequently

7. Issues in usage of 6to4
6to4 Relay Router
IPv4
IPv6
6to4 Relay Router
If a JP user use 6to4 (unintentionally), the packets are routed via a 6to4 relay router in US or in Europe
Larger RTT
Lower network performance
To identify your 6to4 relay router:
IPv4IPv6: traceroute
IPv6IPv4: traceroute6 2002:c058:6301::

8. After Tokyo6to4 Project bootstrapped
6to4 Relay Router
IPv4
IPv6
6to4 Relay Router
Tokyo6to4
Tokyo6to4 Router results in improvement of
Smaller RTT
Improved network performance
It provides IPv6 connectivity until native IPv6 network is widely deployed.

9. The Result
RTT to via 6to4:
About 190ms to less than 10ms

10. Overview of the Project
Tokyo6to4 Project
Volunteer based group from younger ISP/iDC engineers and researchers
Neutral to all existing institutions
Those who contributed:
Yuichiro Tahara, Shin Shirahata, Shuichi Okubo, Miyoko Kumaki, Ryoko Nakanishi, Katsuhiro Horiba, and others
Advisors:
Akira Kato, Osamu Nakamura, Hiroshi Esaki, Yuji Sekiya

11. The operation A limited operation period planned
2 years?
Scalability issues
Separation of production IPv6 services
Its biz model is difficult to establish
6to4 is a kind of public service
Difference to 6to4.jp by KDDI Lab.
IPv4 Anycast ( /24)

12. Preparation Oct 25, 2008 to 26 dawn Nov, 2008 Nov 6, 2008 Dec 2, 2008
Installation of a server in a Keio campus
Nov, 2008
Performance test in a iDC
Nov 6, 2008
AS number (AS38646) get allocated
Dec 2, 2008
Server installed in KDDI Otemachi building

13. Recent Progress Dec 6, 2008 Jan 20, 2009 Current peering status
Advertise 2002::/16 to WIDE Internet
Jan 20, 2009
Peering over DIX-IE started
Advertise /24 to the peers
Current peering status
Established with 17 ASes (ISP,R&E network)
Peering solicited over DIX-IE
Especially these ASes which only has oversea 6to4 relay routes

14. Initial Configuration
IPv6 Internet
IPv4 Internet
Advertise 2002::/16
:Forward packets to ::/0
Advertise /24
Peering Partners
Tokyo6to4 6to4 relay router
Transit
(WIDE)
DIX-IE
Transit (WIDE)
Forward packets to /0
Peering
DIX-IE
Transit
Donated by WIDE Project

15. Traffic as of Jan 20, 2009
To Transit:
To DIX-IE:

16. Traffic as of Feb 28, 2009
トランジット回線:
To Transit:
DIX-IE回線:
To DIX-IE:

17. Write to peering@tokyo6to4.net or contact Okubo or Shirahata
Thank You!
Peering is welcome!
Write to or contact Okubo or Shirahata

18. 今後の展開 公開コンテンツの整備 他の自動トンネル技術の展開 好調な場合,多拠点展開も 一般ユーザ用 ネットワーク管理者用
6to4に加え,Teredoでもサービスを提供
好調な場合,多拠点展開も

19. Special Thanks WIDE Project ピアリングパートナーの皆様 DIX-IEポート提供
IPv4/IPv6トランジット提供
コロケーションスペース提供
ピアリングパートナーの皆様
IPv4ピアリング
IPv6ピアリング