<HTML dir=ltr><HEAD><TITLE>[AfriNIC-rpd] Propose Policy Change: IPv6 HD-Ratio(afpol-ipv6hdr20070330)</TITLE>
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<DIV dir=ltr><FONT face=Arial>Hi All,</FONT></DIV>
<DIV dir=ltr><FONT face=Arial></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial>sorry for late in reply...</FONT></DIV>
<DIV dir=ltr><FONT face=Arial>I'm totally support this proposal to change the HD ratio from 0.8 to be 0.94</FONT></DIV>
<DIV dir=ltr><FONT face=Arial></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial>Thanks,</FONT></DIV>
<DIV dir=ltr><FONT face=Arial>Haitham..</FONT><BR></DIV>
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<DIV dir=ltr><FONT face=Tahoma size=2><B>From:</B> rpd-bounces@afrinic.net on behalf of Adiel A. Akplogan<BR><B>Sent:</B> Sat 3/31/2007 1:49 AM<BR><B>To:</B> rpd@afrinic.net<BR><B>Subject:</B> [AfriNIC-rpd] Propose Policy Change: IPv6 HD-Ratio(afpol-ipv6hdr20070330)<BR></FONT><BR></DIV></DIV>
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<P><FONT size=2>Name: Adiel A. Akplogan<BR>Organisation: AfriNIC<BR>Policy Afected: IPv6 Allocation policy (afpol-v6200407-000)<BR><BR>Date: 30/03/2007<BR><BR>Proposal: Change to the IPv6 HD ratio from 0.8 to 0.94<BR><BR>Rational:<BR>=========<BR><BR>The current IPv6 Address Allocation and Assignment Policy (afpol-v6200407-000)<BR>suggests that most IPv6 subscribers should be assigned a /48 "in the<BR>general case".<BR>The policy also requests AfriNIC to evaluate requests for additional<BR>allocations<BR>based on "units of /48 assignments" and that LIRs be allocated in<BR>general a /32.<BR><BR>Contrary to IPv4 where only utilization determines the level of<BR>consumption hence<BR>the threshold for subsequent allocations (80% host based utilization), in the<BR>IPv6 Policy efficient address space utilization threshold is used to determine<BR>eligibility to subsequent allocations. The HD-Ratio is a way of measuring the<BR>efficiency of address assignment [RFC 3194]:<BR><BR>          Log (number of allocated objects)<BR>   HD = ------------------------------------------<BR>        Log (maximum number of allocatable objects)<BR><BR>The efficiency utilization threshold (T) is expressed as a number of<BR>individual<BR>/48 prefixes allocated from an IPv6 prefix (P). It can be calculated as:<BR><BR>        ((48-P)*HD)<BR>   T = 2<BR><BR>The HD-Ratio presently defined for IPv6 is at 0.8.<BR><BR>This has the effect of making subsequent allocations to LIRs after only 10.9%<BR>utilization of their available space. If the allocation prefix is brought down<BR>to /20 the efficient utilization threshold  will only be 2.1% using  the HD<BR>ratio of 0.80. Based on this, the LIRs will have much more unused IP addresses<BR>than they really need for their efficient growth planning. (See ANNEX 1).<BR><BR>This policy proposal suggests to raise the HD ratio from 0.80 to 0.94. Doing<BR>this could allow  to reduce by 3 bit the consumption of whole IPv6 address<BR>space over the next 50 years. An LIR will then qualify for a subsequent<BR>allocation only when its uses (for a /32) 51.41% of its allocation.<BR><BR>See<BR><A href="http://smakd.potaroo.net/ietf/all-ids/draft-narten-iana-rir-ipv6-considerations-00.txt">http://smakd.potaroo.net/ietf/all-ids/draft-narten-iana-rir-ipv6-considerations-00.txt</A><BR><BR>for more analysis on Issues Related to the Management of IPv6 Address Space.<BR><BR>** Similar adjustment of the HD-Ration has been adopted in the other<BR>RIR regions **<BR><BR><BR>ANNEX 1<BR>========<BR><BR>A) With an HD=0.8<BR><BR>The following table provides equivalent absolute and percentage address<BR>utilization figures for IPv6 prefixes, corresponding to an HD-Ratio of 0.8<BR><BR><BR>         P       48-P            Total /48s     Threshold    Util%<BR><BR>         48       0                   1                1     100.0%<BR>         47       1                   2                2      87.1%<BR>         46       2                   4                3      75.8%<BR>         45       3                   8                5      66.0%<BR>         44       4                  16                9      57.4%<BR>         43       5                  32               16      50.0%<BR>         42       6                  64               28      43.5%<BR>         41       7                 128               49      37.9%<BR>         40       8                 256               84      33.0%<BR>         39       9                 512              147      28.7%<BR>         38      10                1024              256      25.0%<BR>         37      11                2048              446      21.8%<BR>         36      12                4096              776      18.9%<BR>         35      13                8192             1351      16.5%<BR>         34      14               16384             2353      14.4%<BR>         33      15               32768             4096      12.5%<BR>         32      16               65536             7132      10.9%<BR>         31      17              131072            12417       9.5%<BR>         30      18              262144            21619       8.2%<BR>         29      19              524288            37641       7.2%<BR>         28      20             1048576            65536       6.3%<BR>         27      21             2097152           114105       5.4%<BR>         26      22             4194304           198668       4.7%<BR>         25      23             8388608           345901       4.1%<BR>         24      24            16777216           602249       3.6%<BR>         23      25            33554432          1048576       3.1%<BR>         22      26            67108864          1825677       2.7%<BR>         21      27           134217728          3178688       2.4%<BR>         20      28           268435456          5534417       2.1%<BR>         19      29           536870912          9635980       1.8%<BR>         18      30          1073741824         16777216       1.6%<BR>         17      31          2147483648         29210830       1.4%<BR>         16      32          4294967296         50859008       1.2%<BR>         15      33          8589934592         88550677       1.0%<BR>         14      34         17179869184        154175683       0.9%<BR>         13      35         34359738368        268435456       0.8%<BR>         12      36         68719476736        467373275       0.7%<BR>         11      37        137438953472        813744135       0.6%<BR>         10      38        274877906944       1416810831       0.5%<BR>          9      39        549755813888       2466810934       0.4%<BR>          8      40       1099511627776       4294967296       0.4%<BR>          7      41       2199023255552       7477972398       0.3%<BR>          6      42       4398046511104      13019906166       0.3%<BR>          5      43       8796093022208      22668973294       0.3%<BR>          4      44      17592186044416      39468974941       0.2%<BR><BR>B) with an HD=0.94<BR><BR>The following table provides equivalent absolute and percentage address<BR>utilization figures for IPv6 prefixes, corresponding to an HD-Ratio of<BR>0.94.<BR><BR>         P        48-P            Total /48s      Threshold    Util%<BR><BR>                                       <BR>         48           0                  1                1     100.00%<BR>         47           1                  2                2     95.93%<BR>         46           2                  4                4     92.02%<BR>         45           3                  8                7     88.27%<BR>         44           4                 16               14     84.67%<BR>         43           5                 32               26     81.23%<BR>         42           6                 64               50     77.92%<BR>         41           7                128               96     74.74%<BR>         40           8                256              184     71.70%<BR>         39           9                512              352     68.78%<BR>         38          10               1024              676     65.98%<BR>         37          11               2048             1296     63.29%<BR>         36          12               4096             2487     60.71%<BR>         35          13               8192             4771     58.24%<BR>         34          14              16384             9153     55.86%<BR>         33          15              32768            17560     53.59%<BR>         32          16              65536            33689     51.41%<BR>         31          17             131072            64634     49.31%<BR>         30          18             262144           124002     47.30%<BR>         29          19             524288           237901     45.38%<BR>         28          20            1048576           456419     43.53%<BR>         27          21            2097152           875653     41.75%<BR>         26          22            4194304          1679965     40.05%<BR>         25          23            8388608          3223061     38.42%<BR>         24          24           16777216          6183533     36.86%<BR>         23          25           33554432         11863283     35.36%<BR>         22          26           67108864         22760044     33.92%<BR>         21          27          134217728         43665787     32.53%<BR>         20          28          268435456         83774045     31.21%<BR>         19          29          536870912        160722871     29.94%<BR>         18          30         1073741824        308351367     28.72%<BR>         17          31         2147483648        591580804     27.55%<BR>         16          32         4294967296       1134964479     26.43%<BR>         15          33         8589934592       2177461403     25.35%<BR>         14          34        17179869184       4177521189     24.32%<BR>         13          35        34359738368       8014692369     23.33%<BR>         12          36        68719476736      15376413635     22.38%<BR>         11          37       137438953472      29500083768     21.46%<BR>         10          38       274877906944      56596743751     20.59%<BR>          9          39       549755813888     108582451102     19.75%<BR>          8          40      1099511627776     208318498661     18.95%<BR>          7          41      2199023255552     399664922315     18.17%<BR>          6          42      4398046511104     766768439460     17.43%<BR>          5          43      8796093022208    1471066903609     16.72%<BR>          4          44     17592186044416    2822283395519     16.04%   <BR><BR><BR>_______________________________________________<BR>rpd mailing list<BR>rpd@afrinic.net<BR><A href="https://lists.afrinic.net/mailman/listinfo.cgi/rpd">https://lists.afrinic.net/mailman/listinfo.cgi/rpd</A><BR></FONT></P></DIV></BODY></HTML>