Consideration on IPv6 Address Management Sean Shen Mar 3rd, 2010 Outline CNNIC’s Mission on Address Management Current Address Management Considerations on Address Management Conclusion.
Download ReportTranscript Consideration on IPv6 Address Management Sean Shen Mar 3rd, 2010 Outline CNNIC’s Mission on Address Management Current Address Management Considerations on Address Management Conclusion.
Consideration on IPv6 Address Management Sean Shen Mar 3rd, 2010 Outline CNNIC’s Mission on Address Management Current Address Management Considerations on Address Management Conclusion CNNIC’s Mission on Address Management From the perspective of a NIR, CNNIC values the following targets Address Aggregation Address Administration Allocation Renumbering Statistics Address Authentication ··· Outline Introduction of CNNIC Current Address Management Considerations on Address Management Conclusion IPv4 Address Allocation IPv4 Addresses 283 members of CNNIC IP Address Allocation Confederation Allocation Window is 4B More than 181 million IPv4 addresses in China, 26% of them are allocated by CNNIC Country/Region USA Number of IPv4 Addresses 1480545792 Mainland China 205031168 Japan 155271963 Germany 85760152 Canada 76549888 Korea 72320768 UK 71075160 France 68283072 Australia 37630208 Italy 33116608 By June of 2009 IPv4 Address Management in China IPv4 Allcation National Internet Registry 0.4 • CNNIC 0.3 Confederations • China Telecom • China Unicom • CERNET 0.2 0.1 0 CHINANET 34.24% CNNIC 26.33% UNICOM 20.18% CMNET CERNET 6.99% 6.72% Feedback from MIIT and ISPs Lack of statistics information For governance Common ISP For ISPs Inefficiency • Request from RIR Manual configuration • China Mobile Address block number and BGP entries • Request from NIR or other confederations The idleness of address • 263 Organizations User Identity Management Billing Customization Others 5.54% IPv6 Address Management in China • The more organizations, the more complicated • IPv6 brings some new features, providing some solutions to the above problems • • • • Stateless address auto-configuration Prefix Delegation ID/locator split Portable address 国内IPv6地址分配情况 1 1 1 1 1 1 1 1 1 1 1 1 1 1 长城宽带网络服务有限公司 北京谷翔信息技术有限公司 东方有线网络有限公司 中国中信集团公司管理信息部 北京软件与信息服务业促进中心 北京万网志成科技有限公司 东莞市博路电信科技有限公司 重庆网通信息港宽带网络有限公司 北京电信通电信工程有限公司 中国移动通信集团公司 中国科技网 中国国际电子商务中心 中国铁通集团有限公司 中国互联网络信息中心 中国南方电网有限责任公司 中国联合网络通信有限公司 中国电信集团公司 2 2 2 8 北京神州长城通信技术发展中心 11 中国教育和科研计算机网 16 北京天地互连信息技术有限公司 0 5 10 15 20 Goals for Address Management Automation • Automatic block allocation and end-point address assignment Flexibility • Support the change of network topology and scale Information Sharing • IP address Information sharing mechanism for Internet Governance • IP address Information sharing mechanism inside the ISPs Authentication • Address is authorized and authenticated Outline Introduction of CNNIC Current Address Management Considerations on Address Management Conclusion Address Management Structure • Internet governance RIR • NIR & LIR • Request IP address from RIR ISP1 • ISPs • ISPs get IP addresses from NIR & LIR • Downstream ISPs • Access network ISP2 ··· Level1.2 Level1.1 Level2.2 Level2.1 • Terminals • Get IP addresses from upstream Level3.2 Level3.1 Person Company Subnet1 PC Subnet2 PC CNNIC ··· PC Subnetn Server Terminal Notebook PDA TV for Governance Unified Allocation Plan • block allocation and coordination system • To minimize the size of routing table • To meet the growth-based requirements • Topology-independent solutions, GAP • Topology-dependent solutions, not necessary, but it is important for ISP. Address block information acquisition • The statistics for the address usage • The number of address and block • Ratio of usage • Topology • Geo-location • ... For ISPs Automatic address block management Initial allocation, fairness • Plan on demand • Meet the requirement based on ISP’s future change • Need topology-dependent solutions • Configuration • Prefix delegation is a good idea in IPv6 Renumbering, efficiency • Topology-independent solutions • Topology-dependent solutions, NONE For Access Network Authenticated and Trustworthy management authorized address assignment and control • To prevent fake IP addresses • SAVI Address information acquisition and validation • To eliminate the abusage of IP address • IP Whois? Reverse DNS ? • ISP, Geo-location, user identity, etc • Challenge from dynamic address management • In China, 62.4% of IPv4 addresses are dynamic address • Stateless address auto-configuration is available in IPv6 Privacy preserving Outline Introduction of CNNIC Current Address Management Considerations on Address Management Conclusion Conclusion A rational algorithm is important for initial allocation and renumbering • Topology independent • Topology dependent Automatic address delegation solutions are desirable • DHCP is used for terminal IP address assignment • DHCP is extended to support prefix delegation in IPv6 • Combined with allocation algorithm Hierarchical IP address storage and query system • Statistics data for internet governance • Supportive data for Internet business • Validated data for trustworthy application CNNIC-Cisco Addressing Research Lab, Oct.2009 Thank you! GAP: Growth-based Address Partitioning An+1, Rn+1 n+1 Ai, Ri 1 i n Li Ln+1 max min t ( Li , Ai , Ri ), t ( Ln 1 , An 1 , Rn1 ), i 1,..., n Renumbering Overview (RFC 4192) 1. Plan for the renumbering process A. Develop a new addressing plan B. Prepare address assignment and DNS 2. Configure network elements with the new prefix A. Modify ACLs, filters and other security B. Assign prefixes to links and addresses to interfaces C. Add new prefixes to routing infrastructure 3. Configure hosts with addresses of new prefix 4. Transition from use of the old prefix to the new prefix 5. Remove the old prefix CNNIC-Cisco Addressing Research Lab Focus on network addressing-related research: • address allocation • address management and administration • address identification • address security • IPv6 addresses • … To identify potential issues and provide solutions for the next generation internet. http://hdl.cnnic.cn/