<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Eduardo,<div><br></div><div>Sorry that I was in a run yesterday, I do know your work and I think it is great. </div><div><br></div><div>Actually, RIPE Research is working in a similar analysis but going back several years.</div><div><br></div><div>They did an interim report in their last meeting.</div><div><br></div><div>The report can be found here: <a href="http://rosie.ripe.net/ripe/meetings/ripe-56/presentations/uploads/Monday/Plenary%2016:00/upl/Karrenberg-IPv4_Prefix_Lengths.LGnt.pdf">http://rosie.ripe.net/ripe/meetings/ripe-56/presentations/uploads/Monday/Plenary%2016:00/upl/Karrenberg-IPv4_Prefix_Lengths.LGnt.pdf</a></div><div><br></div><div>Roque</div><div><br></div><div><br><div><div>On May 28, 2008, at 10:52 AM, Eduardo Ascenco Reis wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Hi LacNog Fellows,<br><br>I am forwarding bellow a message sent to NANOG about a thread related with some yesterday discussions.<br><br>Also, you can access the original work presented at the Brazilian GTER 24 meeting (in Portuguese):<br><a href="ftp://ftp.registro.br/pub/gter/gter24/04-bgp-reducao-cidr.pdf">ftp://ftp.registro.br/pub/gter/gter24/04-bgp-reducao-cidr.pdf</a><br><a href="http://gter.nic.br/reunioes/gter-24/programa">http://gter.nic.br/reunioes/gter-24/programa</a><br><br>Thanks,<br><br>Eduardo Ascenço Reis<br><eduardo@intron.com.br><br><br><br>------------- Segue mensagem encaminhada -------------<br><br>Data: Fri, 30 Nov 2007 01:05:39 -0200<br>De: "Eduardo Ascenco Reis" <eduardo@intron.com.br><br>Para: nanog@merit.edu<br>Assunto: IPv4 BGP Table Reduction Analysis - Prefixes Filter by RIRs Minimum Allocations Boundaries<br><br>Nanog Fellows,<br><br>I would like to share a work that may be of interest to some of you.<br><br>Although the BGP data is around one month old and the original focus was on Brazilian AS and IP prefixes, the general analysis covers all Regional Internet Registries (RIRs).<br><br>This work is part of an IPv4 BGP table reduction analysis and it is about IP prefixes filter by RIRs minimum allocations boundaries methodology (a well discussed Thread - Jon Lewis, et al).<br><br>The analysis uses BGP data from University of Oregon Route Views Archive Project (2007-10-23-2000) and estimate possible impacts considering suboptimal routing and unreachable destinations.<br><br>The methodology shows a good efficiency (around 40%) reducing BGP table size, but the estimated number of affect prefixes are also high (around 30%).<br><br>The report covers impact analysis per RIR and IP prefixes distribution. It also do some IP prefixes accounting and analyse each RIR contribution to BGP table size.<br><br>Here is the brief report URL:<br>http://www.intron.com.br/doc/bgp/gter24-en-summary.eascenco.bgp-table-red.rir-min-alloc.20071026.v-2007112901.html<br><br>Any comments or suggestions (list or private) are welcome.<br><br>Eduardo Ascenço Reis<br><eduardo@intron.com.br><br><br><br><br><br>_______________________________________________<br>LACNOG mailing list<br>LACNOG@lacnic.net<br>https://mail.lacnic.net/mailman/listinfo/lacnog<br></blockquote></div><br></div></body></html>