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HD-ratio for IPv4 -A new criteria for applying IP allocation

HD-ratio for IPv4 -A new criteria for applying IP allocation. NCIC 新世紀資通股份有限公司 Mars Wei 危之華 2004/11/24 @ 3rd TWNIC OPM. Current Criteria for applying IPv4 allocation. First Time /23 needed immediately and /22 in a year to allocate /21, the minimum space Subsequence

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HD-ratio for IPv4 -A new criteria for applying IP allocation

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  1. HD-ratio for IPv4-A new criteria for applying IP allocation NCIC 新世紀資通股份有限公司 Mars Wei 危之華 2004/11/24 @ 3rd TWNIC OPM

  2. Current Criteria for applying IPv4 allocation • First Time • /23 needed immediately and /22 in a year to allocate /21, the minimum space • Subsequence • Fix utilization as 80% required for total past allocations • Including assignment and sub-allocation • Document plans required HD-ratio for IPv4

  3. Why HD-ratio for IPv4? • Difficulty for large ISP to reach 80% utilization • No allowance for hierarchy in managing IP address allocation • One 80% rule fits all size is unfair • Variable % utilization required • Different % threshold for different sized IP address allocation HD-ratio for IPv4

  4. NIR ISP … Customers and Infrastructure More ‘efficient’ with less hierarchy Source: APNIC HD-ratio for IPv4

  5. ‘Efficiency’ loss through hierarchy NIR ISP Regions/POPs “Internal” Hierarchy Services … Customers and Infrastructure Deeper hierarchy = lower efficiency Source: APNIC HD-ratio for IPv4

  6. What is HD-ratio for IPv4? • Host Density Ratio • RFC 3194 • For IP address • HD-ratio has been adopted to IPv6 HD-ratio for IPv4

  7. Selection of the HD ratio value Source: APNIC HD-ratio for IPv4

  8. 100% 90% 80% rule 80% 70% 60% 50% /21 minimum allocation 40% 30% 20% 0.96 0.972 10% 0.98 0% /32 /28 /24 /20 /16 /12 /8 Proposed flexible utilisation Source: APNIC HD-ratio for IPv4

  9. Status • First idea presented in APNIC 16 as an informational item • http://www.apnic.net/meetings/16/programme/sigs/policy.html • Posted to APNIC sig-policy mailing list as a proposal on Aug 4, 2004 • http://www.apnic.net/mailing-lists/sig-policy/archive/2004/08/msg00001.html • Presented as a proposal in APNIC 18 and still an open item for APNIC secretariat to conduct a survey • http://www.apnic.net/meetings/18/programme/minutes/policy.html#4 HD-ratio for IPv4

  10. What’s the next step in Taiwan? HD-ratio for IPv4

  11. References • [RFC3194] “The Host-Density Ratio for Address Assignment Efficiency: An update on the H ratio” A. Durand, C. Huitema, November 2001http://www.ietf.org/rfc/rfc3194.txt • [APNIC-089] “IPv6 Address Allocation and Assignment Policy”http://www.apnic.net/docs/policy/add-manage-policy.html • [APNIC-086] “Policies for IPv4 address space management in the Asia Pacific region”http://www.apnic.net/docs/policy/add-manage-policy.html HD-ratio for IPv4

  12. Thanks ! HD-ratio for IPv4

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