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3. APNIC Internet Number Resource Policies

Appendix A: HD-Ratio

1 Leave a comment on paragraph 1 0 The utilization threshold T, expressed as a number of individual /56 prefixes to be allocated from IPv6 prefix P, can be calculated as:

T=2((56-P)*HD)

3 Leave a comment on paragraph 3 0 Thus, the utilization threshold for an organization requesting subsequent allocation of IPv6 address block is specified as a function of the prefix size and target HD-Ratio. This utilization refers to the allocation of /56s to end sites, and not the utilization of those /56s within those end sites. It is an address allocation utilization ratio and not an address assignment utilization ratio.

4 Leave a comment on paragraph 4 0 This document adopts an HD-Ratio of 0.94 as the utilization threshold for IPv6 address space allocations.

5 Leave a comment on paragraph 5 0 The following table provides equivalent absolute and percentage address utilization figures for IPv6 prefixes, corresponding to an HD-Ratio of 0.94.

6 Leave a comment on paragraph 6 0 P            56-P      Total /56s          Threshold          Util%

7 Leave a comment on paragraph 7 0 56         0            1            1            100.0

8 Leave a comment on paragraph 8 0 55         1            2            2            95.9

9 Leave a comment on paragraph 9 0 54         2            4            4            92.0

10 Leave a comment on paragraph 10 0 53         3            8            7            88.3

11 Leave a comment on paragraph 11 0 52         4            16         14         84.7

12 Leave a comment on paragraph 12 0 51         5            32         26         81.2

13 Leave a comment on paragraph 13 0 50         6            64         50         77.9

14 Leave a comment on paragraph 14 0 49         7            128       96         74.7

15 Leave a comment on paragraph 15 0 48         8            256       184       71.7

16 Leave a comment on paragraph 16 0 47         9            512       352       68.8

17 Leave a comment on paragraph 17 0 46         10         1,024    676       66.0

18 Leave a comment on paragraph 18 0 45         11         2,048    1,296    63.3

19 Leave a comment on paragraph 19 0 44         12         4,096    2,487    60.7

20 Leave a comment on paragraph 20 0 43         13         8,192    4,771    58.2

21 Leave a comment on paragraph 21 0 42         14         16,384 9,153    55.9

22 Leave a comment on paragraph 22 0 41         15         32,768 17,560 53.6

23 Leave a comment on paragraph 23 0 40         16         65,536 33,689 51.4

24 Leave a comment on paragraph 24 0 39         17         131,072              64,634 49.3

25 Leave a comment on paragraph 25 0 38         18         262,144              124,002              47.3

26 Leave a comment on paragraph 26 0 37         19         524,288              237,901              45.4

27 Leave a comment on paragraph 27 0 36         20         1,048,576          456,419              43.5

28 Leave a comment on paragraph 28 0 35         21         2,097,152          875,653              41.8

29 Leave a comment on paragraph 29 0 34         22         4,194,304          1,679,965          40.1

30 Leave a comment on paragraph 30 0 33         23         8,388,608          3,223,061          38.4

31 Leave a comment on paragraph 31 0 32         24         16,777,216        6,183,533          36.9

32 Leave a comment on paragraph 32 0 31         25         33,554,432        11,863,283        35.4

33 Leave a comment on paragraph 33 0 30         26         67,108,864        22,760,044        33.9

34 Leave a comment on paragraph 34 0 29         27         134,217,728      43,665,787        32.5

35 Leave a comment on paragraph 35 0 28         28         268,435,456      83,774,045        31.2

36 Leave a comment on paragraph 36 0 27         29         536,870,912      160,722,871      29.9

37 Leave a comment on paragraph 37 0 26         30         1,073,741,824   308,351,367      28.7

38 Leave a comment on paragraph 38 0 25         31         2,147,483,648   591,580,804      27.5

39 Leave a comment on paragraph 39 0 24         32         4,294,967,296   1,134,964,479   26.4

40 Leave a comment on paragraph 40 0 23         33         8,589,934,592   2,177,461,403   25.3

41 Leave a comment on paragraph 41 0 22         34         17,179,869,184               4,177,521,189   24.3

42 Leave a comment on paragraph 42 0 21         35         34,359,738,368               8,014,692,369   23.3

43 Leave a comment on paragraph 43 0 20         36         68,719,476,736               15,376,413,635               22.4

44 Leave a comment on paragraph 44 0 19         37         137,438,953,472               29,500,083,768               21.5

45 Leave a comment on paragraph 45 0 18         38         274,877,906,944               56,596,743,751               20.6

46 Leave a comment on paragraph 46 0 17         39         549,755,813,888               108,582,451,102            19.8

47 Leave a comment on paragraph 47 0 16         40         1,099,511,627,776               208,318,498,661            18.9

48 Leave a comment on paragraph 48 0 15         41         2,199,023,255,552               399,664,922,315            18.2

49 Leave a comment on paragraph 49 0 14         42         4,398,046,511,104               766,768,439,460            17.4

50 Leave a comment on paragraph 50 0 13         43         8,796,093,022,208               1,471,066,903,609         16.7

51 Leave a comment on paragraph 51 0 12         44         17,592,186,044,416               2,822,283,395,519         16.0

52 Leave a comment on paragraph 52 0 11         45         35,184,372,088,832               5,414,630,391,777         15.4

53 Leave a comment on paragraph 53 0 10         46         70,368,744,177,664               10,388,121,308,479       14.8

54 Leave a comment on paragraph 54 0 9            47         140,737,488,355,328               19,929,904,076,845       14.2

55 Leave a comment on paragraph 55 0 8            48         281,474,976,710,656               38,236,083,765,023       13.6

56 Leave a comment on paragraph 56 0 7            49         562,949,953,421,312               73,357,006,438,603       13.0

57 Leave a comment on paragraph 57 0 6            50         1,125,899,906,842,620               140,737,488,355,328     12.5

58 Leave a comment on paragraph 58 0 5            51         2,251,799,813,685,250               270,008,845,646,446     12.0

59 Leave a comment on paragraph 59 0 4            52         4,503,599,627,370,500               518,019,595,058,136     11.5

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Source: https://comment.apnic.net/?page_id=81&page=6&replytopara=44