<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>
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<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>