November, 2005 IPv6 DNS Service Deployment in Korea Dr. Sir, Jae-Chul

2 Contents Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ International Trend KR Main Strategy KR Deployment Status KR Future Service Plan Ⅶ Ⅶ Korea IPv6 Infra. Status Ⅲ Ⅲ Ⅳ Ⅳ Ⅴ Ⅴ Ⅵ Ⅵ

3 Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ Korea IPv6 Infra. Status Ⅲ Ⅲ KR Main Strategy Ⅴ Ⅴ KR Deployment Status Ⅵ Ⅵ KR Future Service Plan Ⅶ Ⅶ International Trend Ⅳ Ⅳ

4 Background & Need Advent of IPv6 (1999) (1999) Advent of IPv4 (Early 1980s) Early stage of Internet Name-IP mapping table (hosts.txt file) Needs for DNS Activated IPv4 (1990s) (1990s) Increased Network/Host Development of various application services Activated hi-speed Internet service Development of wireless/mobile tech. Appearance of various new services Advent of ubiquitous era Arrangement for hi- performance IPv6 application test basis Need for stable IPv6 DNS tech. IPv4 DNS IPv6 DNS the importance of DNS protocol is increased under Internet environment, DNS tech. is advanced Depletion of IPv4 (1994) (1994) Need for systematic.KR DNS and tech. for early settlement of local IPv6 DNS service

5 Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ Korea IPv6 Infra. Status Ⅲ Ⅲ KR Main Strategy Ⅴ Ⅴ KR Deployment Status Ⅵ Ⅵ KR Future Service Plan Ⅶ Ⅶ International Trend Ⅳ Ⅳ

6 Goals in.KR IPv6 DNS Root name server (IPv4/IPv6).KR name server (IPv4/IPv6).or.kr name server (IPv4/IPv6) web server (IPv4/IPv6) ? local name server (IPv4/IPv6) user (IPv4, IPv6, IPv4/IPv6) Connect (IPv6 Socket 2001:dc5:a::100) Connect (IPv4 Socket ) query answer Stage 1 (~2001) Stage 2 (2002~2005) Stage 3 (2006~2010) Stage 4 (2011~) IPv4 Only IPv6 Only IPv6 testbed ․ ․ ․․ ․ ․ IPv6 Island IPv4 Ocean IPv6 Ocean IPv4 Island Development of DNS service to provide stability toward IPv6 Network side - IPv4/IPv6 dual-stack Network side - IPv4/IPv6 dual-stack DNS delegation config. - Need to IPv6 delegation under root name server DNS delegation config. - Need to IPv6 delegation under root name server

7 Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ Korea IPv6 Infra. Status Ⅲ Ⅲ KR Main Strategy Ⅴ Ⅴ KR Deployment Status Ⅵ Ⅵ KR Future Service Plan Ⅶ Ⅶ International Trend Ⅳ Ⅳ

8 Korea IPv6 Infra. Status(1/4) Korea IPv6 Network Topology

9 Korea IPv6 Infra. Status(2/4) First IPv6 experimental network in Korea First IPv6 experimental network in Korea 78+ org. has involved in 6Bone-KR ( ( 6Bone-KR KOREN & KREONET2 IPv6 TEIN IPv6 & 6NGIX KOREAv6 1998~ 1999~ 2001~ 2004~ IPv6 Network Deployment in Korea KOREN, First native IPv6 network in Korea(by KT) KOREN, First native IPv6 network in Korea(by KT) KREONET2(by KISTI) KREONET2(by KISTI) R&D network R&D network TEIN (Trans Eurasia Information Network) : Continetal IPv6 network between Asia & Europe TEIN (Trans Eurasia Information Network) : Continetal IPv6 network between Asia & Europe 6NGIX : IPv6 Internet Exchange Point in Korea(by NCA) 6NGIX : IPv6 Internet Exchange Point in Korea(by NCA) Native IPv6 Trial Service Network in Korea Native IPv6 Trial Service Network in Korea NIDA participates in this project for “TEST.KR” IPv6 trial DNS Service NIDA participates in this project for “TEST.KR” IPv6 trial DNS Service

10 Korea IPv6 Infra. Status(3/4) KRDNSv6 Service based on Korea IPv6 Infra. IPv6 firewall Web.KR DNS (IPv4 only) a.dns.kr (NIDA) KOREAv6 6KANET, KOREN, KREONET, 6NGIX, ISP (IPv4/IPv6) IPv6 DNS Testbed (NIDA) g.dns.kr (NIDA) KRDNSv6 (IPv4/IPv6) TEST.KR Local DNS for KOREAv6 Trial Service b.dns.kr (KT) c.dns.kr (Dacom) d.dns.kr (Dacom) e.dns.kr (KISTI) f.dns.kr (Hanaro) Internet (IPv4) Global IPv6 Network

11 Korea IPv6 Infra. Status(4/4) Campus Government IPv6 portal Hospital CDMA/WCDMA Equipment Test Home Network Enterprise HDTV ISP Service KOREN KREONET 6KANet ISP 6NGIX KOREAv6 project National trial IPv6 service network which is interconnected with existing IPv6 network (e.g., 6KANET, KOREN, KREONET, 6NGIX, commercial ISP network) Various IPv6 based trial services(VoIPv6, IPv6 Streaming, CDMA-based Home Network, IPv6 G/W, MobileIPv6, IPv6 DNS and so on) are tested

12 Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ Korea IPv6 Infra. Status Ⅲ Ⅲ KR Main Strategy VI KR Deployment Status Ⅵ Ⅵ KR Future Service Plan Ⅶ Ⅶ International Trend Ⅳ Ⅳ

13 Local Strategy in IPv6 DNS Providing Stable IPv6 DNS Service Providing Tech. information Deploying IPv6 while keeping stability of existing IPv4 based 6.KR DNS service - After additional construction of IPv6.KR Secondary DNS (g.dns.kr) - Applying IPv6 to existing DNS step by step Deploying IPv6 while keeping stability of existing IPv4 based 6.KR DNS service - After additional construction of IPv6.KR Secondary DNS (g.dns.kr) - Applying IPv6 to existing DNS step by step After deployment, trial service commencement and DNS operational tech. accumulation through service expansion - cooperation with other organization in.KR DNS trial service - Sharing DNS tech. by launching web site After deployment, trial service commencement and DNS operational tech. accumulation through service expansion - cooperation with other organization in.KR DNS trial service - Sharing DNS tech. by launching web site

14 Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ Korea IPv6 Infra. Status Ⅲ Ⅲ KR Main Strategy Ⅴ Ⅴ KR Deployment Status V V KR Future Service Plan Ⅶ Ⅶ International Trend Ⅳ Ⅳ

15 IPv6 DNS Deployment Milestone 2000 ~ Construction of tunneling IPv6 network & IPv4/IPv6 interoperability test Construction of tunneling IPv6 network & IPv4/IPv6 interoperability test Construction of Native-IPv6 network Construction of Native-IPv6 network Construction of IPv6 DNS trial system & IPv4/IPv6 interoperability test Construction of IPv6 DNS trial system & IPv4/IPv6 interoperability test Education(NGI2 & IPv6 DNS workshop) Education(NGI2 & IPv6 DNS workshop) Publication of ‘DNS Guideline’ Publication of ‘DNS Guideline’ Construction of 7 th.KR dual- stack server & network [KRDNSv6 test network] Construction of 7 th.KR dual- stack server & network [KRDNSv6 test network] Delegation of IPv6 AAAA of.kr name server to root DNS zone Delegation of IPv6 AAAA of.kr name server to root DNS zone Registration of IPv6 reverse of.kr name server to APNIC Registration of IPv6 reverse of.kr name server to APNIC Launching DNS web page ( Launching DNS web page (

16 Whatis KRDNSv6 ? IPv4/IPv6 based local DNS network for IPv6 network Construction of trial IPv6 service network through trial IPv6 deployment to.kr domain in 2004 Structureof KRDNSv6 Construction of IPv4/IPv6 interoperable network through cooperation with KOREAv6 Construction of ‘IPv6 DNS preliminary test network’ for IPv6 DNS related technical analysis Fully equipped environment for technical analysis in depth Trial KRDNSv6 Service (1/3) Trial IPv6 DNS Service through KRDNSv6

17.KR DNS IPv6 System Construction Status Trial KRDNSv6 Service (2/3) a.dns.krb.dns.krc.dns.krd.dns.kre.dns.krf.dns.krg.dns.kr - IPv4/IPv6 [1] IPv4 [6] KR. NSa.dns.kr. : KR. NSg.dns.kr. a.dns.kr.A : g.dns.kr.A g.dns.kr.AAAA 2001:dc5:a::1 Registration of reverse delegation to APNIC in /32 Registration of reverse delegation to APNIC in /32 Stabilized IPv6 DNS Service System

18 Trial KRDNSv6 Service (3/3) Trial KRDNSv6 Service Topology as of March IPv4 Network IPv4/IPv6 user IPv4 (query/response) IPv4 IPv6 (query/response) Root DNS IPv4/IPv6 Network IPv4/IPv6 DNS IPv4 KR OR GO PE ROOT(.) mic.go.kr IPv4 user IPv4.KR DNS IPv4 DNS Trial KRDNS6 network Trial KRDNS v 6 network IPv6 IPv4 based application service Application service IPv4/IPv6.KR DNS TEST

19 Trial KRDNSv6 Operation Status (1/6) Statistics Traffic Monitoring (MRTG) Zone checking tools Providing upgraded services as of Aug. 1 IPv4/IPv6 DNS statistics Monitoring 7 th.KR DNS(g.dns.kr) name server traffic Providing zone checking tools for users and so on Launching KRDNSv6 Web Site

20 Statistics.KR DNS (g.dns.kr) IPv6 delegation to root DNS zone World first delegation to ccTLD (July 21, 2004) IPv6-based DNS query/response increased as of July 21 (45, ,000) : IPv6 DNS Query Counter : IPv6 DNS Response Counter Trial KRDNSv6 Operation Status (2/6) 100,000 45,000

21 Trial KRDNSv6 Operation Status (3/6) Statistics IPv6 DNS daily average query : 133,694 vs. IPv4 DNS daily average query : 50,175,656

22 Target server : g.dns.kr Statistics on IPv6 based query by query type PTR(67%) A(14%) A6(13%) AAAA(5%) and so on Statistics Trial KRDNSv6 Operation Status (4/6)

23 Traffic Monitoring (MRTG) Target server : g.dns.kr March 15, 2005, PM 4:20 updated IPv4/IPv6 DNS (daily) Average reception: 431.3kbps Average transmission: 665.6kbps IPv4/IPv6 DNS (weekly) Average reception: 396.3kbps Average transmission: 613.3kbps Daily graph (Average in every 5 min.) Weekly graph (Average in every 30 min.) Trial KRDNSv6 Operation Status (5/6)

24 Zone Checking Tools Providing checking tools for domain config. Problems in DNS operation DNS config. error etc. Constructing stabilized DNS by providing web based zone checking tools for DNS operators Trial KRDNSv6 Operation Status (6/6)

25 Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ Korea IPv6 Infra. Status Ⅲ Ⅲ KR Main Strategy Ⅴ Ⅴ KR Deployment Status Ⅵ Ⅵ KR Future Service Plan VI International Trend Ⅳ Ⅳ

IPv6 DNS service expansion -.KR name server distribution -.KR IPv6 DNS commercial service IP Anycast study - IP Anycast(IPv4/IPv6) study and trial deployment Study to overcome UDP packet size limit Sharing IPv6 DNS technology 2006 ~ Future Service Plan in IPv6 DNS(1/2) Settlement of IPv6 DNS - stable IPv4/IPv6.KR DNS service Transference current IPv4 based.KR DNS name server to IPv4/IPv6 IP Anycast commercial service Study on EDNS0 deployment plan DNS for Next Generation Internet

27 Future Service Plan in IPv6 DNS(2/2).KR DNS Servers IPv4/IPv6 Router a.dns.kr (NIDA, Seoul) IPv4/IPv6 Southern province of Korea mirror DNS BGP & BGP4+ IPv4/IPv6 Router Location Distribution IPv4/IPv6 g.dns.kr IPv4/IPv6 g.dns.kr mirror DNS : Reconfig. & Construction range IPv6 FW BGP & BGP4+ KRDNSv6 b.dns.kr (KT, Seoul) c.dns.kr (DACOM, Anyang) d.dns.kr (DACOM, SanJose) e.dns.kr (KISTI, Daejon) f.dns.kr (HANARO, Seoul) g.dns.kr (NIDA, Seoul) Europe / North America Mirror DNS BGP & BGP4+ IPv4/IPv6 Router IPv4/IPv6 a.dns.kr mirror DNS Globalization IPv4/IPv6 a.dns.kr Internet IPv4/IPv6 :.KR Slave([b-f].dns.kr) DNS : g.dns.kr IPv6 DNS : g.dns.kr Mirror DNS : IPv4/IPv6 Router :.KR Slave(a.dns.kr) DNS : a.dns.kr Mirror DNS.KR IPv6 DNS expansion plan based on IP Anycast

28 Dr. Sir, Jae-Chul,Executive Director Tel : Fax : National Internet Development Agency of Korea CONTACT

29 Background & Need Ⅰ Ⅰ Goals Ⅱ Ⅱ Korea IPv6 Infra. Status Ⅲ Ⅲ KR Main Strategy Ⅴ Ⅴ KR Deployment Status Ⅵ Ⅵ KR Future Service Plan Ⅶ Ⅶ International Trend VII

30 International Trend (1/6) E, Mt. View, CA B, Marina Del Rey, CA F, Palo Alto, CA C, Herndon,VA A, Dulles,VA D, College Park, MD G, Vienna, VA I, Stockholm, Sweden K, London, United Kingdom M, Tokyo, Japan H, Aberdeen, MD J, Dulles,VA L, Los Angeles Worldwide Root DNS Servers : Total 13

31 IPv4/IPv6 dual-interface on 5 root servers from perspective of IP layer - IPv6 based DNS Query acceptable - so, local server needs to be built up as dual network IPv6 delegation to name servers under root - IPv6 AAAA delegation to ccTLD level name server (July 20, 2004 UTC) - Technical limit of DNS packet size 512 bytes International Trend (2/6) Name serverOrganizationLocationIP address BInformation Sciences Institute Marina Del Rey CA IPv4: IPv6: 2001:478:65::53 FInternet Software Consortium Palo AltoIPv4: IPv6: 2001:500::1035 HU.S. Army Research LabAberdeen MDIPv4: IPv6: 2001:500:1::803f:235 KRIPE NCCLondonIPv4: IPv6: 2001:7fd::1 MWIDE ProjectTokyoIPv4: IPv6: 2001:dc3::35 IPv6 Compatibility with Root DNS

32 International Trend (3/6) IPv6 Address Added to the Internet's Root DNS Zone

33 Requests for Adding IPv6 Glue Record Requests for Adding IPv6 Glue Record Delegation Policy Delegation Policy Domain Name Space KR OR NE CO GO ROOT(.) MyCompany MyShop JP COM ORG g.dns.kr.AAAA2001:dc5:a::1 ARPA IPv4/IPv6 IPv6 Enabled Name Servers IPv6 Enabled Name Servers B.ROOT-SERVERS.NET F.ROOT-SERVERS.NET H.ROOT-SERVERS.NET M.ROOT-SERVERS.NET B.ROOT-SERVERS.NET F.ROOT-SERVERS.NET H.ROOT-SERVERS.NET M.ROOT-SERVERS.NET ROOT Zone KR.NSa.dns.kr. : KR.NSg.dns.kr. a.dns.kr.A : g.dns.kr.A g.dns.kr.AAAA 2001:dc5:a::1 : KR.NSa.dns.kr. : KR.NSg.dns.kr. a.dns.kr.A : g.dns.kr.A g.dns.kr.AAAA 2001:dc5:a::1 :.KR IPv6 delegation to ROOT DNS For the first time in the world (Since July 20, 2004 UTC) IPv6 user IPv6 packet with DNS DNS Query: AAAA ? IPv6 packet with DNS DNS Query: AAAA ? IPv6 packet with DNS DNS Response: Refer to KR.NSA.DNS.KR. : KR.NSG.DNS.KR. A.DNS.KR.A : G.DNS.KR. A G.DNS.KR. AAAA 2001:dc5:a::1 IPv6 packet with DNS DNS Response: Refer to KR.NSA.DNS.KR. : KR.NSG.DNS.KR. A.DNS.KR.A : G.DNS.KR. A G.DNS.KR. AAAA 2001:dc5:a::1 International Trend (4/6) 13 Root DNS ccTLD Delegation Services As of March. 2005

34 International Trend (5/6) CountryName No. of DNS Server No. of IPv4/IPv6 dual DNS Server Name of DNS Server IP Address Japan64 a.dns.jp IPv4: IPv6: 2001:dc4::1 b.dns.jp IPv4: c.dns.jp IPv4: d.dns.jp IPv4: IPv6: 2001:240::53 e.dns.jp IPv4: IPv6: 2001:200:0:1::4 f.dns.jp IPv4: IPv6: 2001:2f8:0:100::153 France73 a.ext.nic.fr IPv4: c.ext.nic.fr IPv4: d.ext.nic.fr IPv4: IPv6: 2001:4f8:0:2::8 e.ext.nic.fr IPv4: a.nic.fr IPv4: b.nic.fr IPv4: IPv6: 2001:660:3005:1::1:2 c.nic.fr IPv4: IPv6: 2001:660:3006:1::1:1 Dual-stack Status of ccTLD Countries

35 International Trend (6/6) DNS Name System Simplification of ccTLD Countries  Minimizing DNS response message size through consistent domain name - Systemized domain name can be processed in compressed type - Systemized domain name can be processed in compressed type - This allows DNS response message size that is limited to 512 bytes - This allows DNS response message size that is limited to 512 bytes - This is also very sensitive factor in construction of dual-stack network and IPv6 delegation to root domain name server in the future - This is also very sensitive factor in construction of dual-stack network and IPv6 delegation to root domain name server in the future JP Upgrade from Jul. of 2003 to Aug. of 2003 Upgrade from Jul. of 2003 to Aug. of JP domain names changed : [a-f].dns.jp 6.JP domain names changed : [a-f].dns.jp FR March. of 2005,.FR domain names changed March. of 2005,.FR domain names changed

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