1. IPv6 Trial in CHT & Policy Issues Fu-Kuei Chung fkchung@cht.com.tw Chunghwa Telecom Co. TWNIC IPv6 Working Group Jul. 2001

2. HiNet-IPv6-9007 1 Contents  Overview  6Bone Trial  HiNet IPv6 Trial  Lessons from the IPv6 Trial  Future Trial Works  Summary

3. HiNet-IPv6-9007 2 rChunghwa Telecom run the largest ISP (HiNet) in Taiwan Leased-Line : > 6,500 (2001/07) Dial-up : > 2,000,000 ADSL : > 420,000 rADSL grow very fast End of 2001 : 1,000,000 End of 2002 : 2,000,000 rADSL broadband service consume a great amount of IP rTime for the future provision of IPv6 Overview

4. HiNet-IPv6-9007 3 6-Bone Trial (1/6) r CHT-TL start as a leaf site in 1997/12 & a transit site in 1998/11 r Become a backbone site since 1999/02 Register as CHTTL-TW Get 3FFE:3600::/24 address prefix Have built BGP4+ tunnel with some other backbone sites: Sprint, Viagenie, Cisco, Digital-CA and Telebit, etc. rProvide stable transit service to other sites 3ffe:3600:1::/48 for NDHU 3ffe:3600:2::/48 for CCITT 3ffe:3600:3::/48 for NCKU … etc.

5. HiNet-IPv6-9007 4 6-Bone Trial (2/6) r Techniques and Protocols Trial IPv6-over-IPv4 tunneling testing Stateless auto-configuration testing RIPng and BGP4+ testing r Set up Related Services DNS server supporting AAAA records WWW server FTP server Telnet

6. HiNet-IPv6-9007 5 6Bone Trial (3/6) -- Testing Platform NTHU CCIT NCKU NCU NTU Telebit Sprint Viagenie Cisco Digital-CA HiNet INQMS server IPv6 router IPv6-over-IPv4 tunnels TANET IPv4 Internet NUS-IRDU(SG) ETRI(KR) NTT-ECL(JP)

7. HiNet-IPv6-9007 6 6Bone Trial (4/6) -- Int. Tunnels Telebit(Denmark) 3ffe:0100::/24 Sprint(USA) 3ffe:2900::/24 Viagenie(Canada) 3ffe:0b00::/24 Cisco(USA) 3ffe:0c00::/24 Digital-CA(USA) 3ffe:1200::/24 NTU NCU-1 NCU-2 NCKU-1 NCKU-2 CCU NDHU CCIT NUS-IRDU(SG) 3ffe:1600::/24 ETRI (KR ) 3ffe:2e00::/24 2001:230::/35 NTT-ECL (JP) 3ffe:1800::/24 2001:218::/35 IIJ (JP) 3ffe:8020::/28 CHTTL-TW3ffe:3600::/242001:238::/35

8. HiNet-IPv6-9007 7 6Bone trial (5/6) -- IP Allocation 138166424 3FFE:3600::/24 CHT-TL 128 001 TLA RES NLA SLA Interface ID 001 0x1ffe NLA1 NLA2 SLA Interface ID 3FFE:3600:0000::/40 for tunneling and universities 3FFE:3600:0100::/40 for CHT business groups and subordinates

9. HiNet-IPv6-9007 8 6Bone Trial (6/6) -- IP Allocation 3FFE:3600:0000::/48 reserved 3FFE:3600:0001::/48 for NDHU 東華大學 3FFE:3600:0002::/48 for CCIT 中正理工學院 3FFE:3600:0003::/48 for NCKU 成功大學 3FFE:3600:0004::/48 for NCU-CSIE 中央大學 3FFE:3600:0005::/48 for NCU-CC 中央大學 3FFE:3600:0006::/48 for NTU 臺灣大學 3FFE:3600:0007::/48 for NCCU 中正大學 138166424 3FFE:3600::/24 CHT-TL 128 001 TLA RES NLA SLA Interface ID 001 0x1ffe NLA1 NLA2 SLA Interface ID

10. HiNet-IPv6-9007 9 Purpose of HiNet IPv6 Trial rGet Experience of IPv6 Deployment  Transition Mechanism  Addressing Issues  Network Management  Training  Feedback from End Users

11. HiNet-IPv6-9007 10 HiNet IPv6 Trial Overview rIP Address Block : 2001:238::/35 rDomestic IPv6 Network : 6 POPs rBackbone : Frame Relay rRouters : Cisco 3600 、 4500 Series rServers : Mail : SUN Solaris 2.8 ， Sendmail 8.11.2 DNS : SUN Solaris 2.8 ， Bind 9.0.1 WWW : SUN Solaris 2.8 ， Apache 1.3.14 Routing Server : Linux ， MRTd 6to4 Relay Server : Win2000 rInternational IPv6 Connectivity : 6Bone (planning : 6TAP,...etc.)

12. HiNet-IPv6-9007 11 IPv6 Network Deployment (1/2) Taipei(S2) Taoyuan Hsinchu Taichung Tainan Kaoshiung Frame Relay T1~64Kbps T1~64K HiNet TWIXv6 FE TWIXv6 ISP1 ISP2

13. HiNet-IPv6-9007 12 IPv6 Network Deployment (2/2) rProvision Service Types l Tunnel Mode-Dual Stack l Native IPv6 Connection v4 Internet USer Routers v6 HiNet Routers User Hosts User Routers Relay Server Routers 6to4 Relay Auto-Tunnel Tunnel Mode Dual Stacks Native IPv6 BGP or Static Looking Glass BGP Peering Status MRTG Map IBGP

14. HiNet-IPv6-9007 13 IPv6 Address Allocation rIPv6 Address Block:2001:238::/35 lNLA1 ---/37, NLA2 ---/41 r For main PoPs (Regional Center), allocate prefix “/37” l2001:238:0000::/37, 2001:238:0800::/37 -->Taipei (Northern) l2001:238:1000::/37 --> Taichung (Central) l 2001:238:1800::/37 --> Kaohsiung (Southern) r For other PoPs, allocate prefix “/41” l2001:0238:0000::/41 --> Taoyung l2001:0238:1800::/41 --> r For leased-line end users, assign prefix “/48” l2001:238:0002::/48 --> User-1 …………………………... l2001:238:1802::/48 --> User-n

15. HiNet-IPv6-9007 14 TWIX v6 Native IPv6 BGP v6 HiNet Route Server(MRTd) User Routers User Routers RR or Looking Glass BGP Peering Status MRTG Map + Looking Glass BGP Peering Status MRTG Map IBGP Phase II Phase I Routers IPv6 Internet Exchange (1/2)

16. HiNet-IPv6-9007 15 ISP IPv6 IX Room ISP ISP Co-locate Router Ether Switch DSU/CSU IPv6 Route Reflector Native IPv6 peering NMS Server IPv4 Internet IPv6 Internet Exchange (2/2)

17. HiNet-IPv6-9007 16 Lessons from the IPv6 Trial (1/2) rHierarchy Aggregation lTop level aggregation, different from IPv4 situation lImpact to small and medium ISPs rMulti-homing l IPv4 multi-home routing approach could not be adopted lHow to resolve load-sharing and back-up issues rTransition Mechanisms Lots of defined mechanisms Which are easily provided by an ISP? Which mechanisms provide best performance for the customer?

18. HiNet-IPv6-9007 17 rIPv6 Address Assignment l How to efficiently use IPv6 address space? rIPv6 Address Naming Issues How to support huge naming database? How to maintain look-up performance?  Access Not much available: dial-up, xDSL … DHCP needed  Applications Need more new applications, IPv4 and IPv6 aware Lessons from the IPv6 Trial (2/2)

19. HiNet-IPv6-9007 18  Connect to IPv6 IX(Internet Exchange)  IPSec  Multicast  QoS-DiffServe  VoIPv6  IPv6 for Wireless LAN  Mobile IPv6 - IPv6 over 3G Cellular ….. Future Trial Works

20. HiNet-IPv6-9007 19 Summary r IPv6 technology has stepped from testing stage to initial commercial deployment r Most IPv6 activities in Taiwan are still focused on research and experiment efforts r TWNIC is promoting commercial IPv6 service via integration efforts of ISPs and related industries r Chunghwa Telecom is actively proceeding IPv6 Trial. We expect to get more experience before ready for commercial services

21. Thank you for the attention