Hello Andrzej, Good point. You said that some ISPs are using IPv4 PI address space just because they asked it in their very small ISP status, as being pre-LIR. It would have been much better to change back these addresses to PA already long time. Is there anybody who can suggest a cleaning policy? Of course, vleaning is very difficult whan almost all IPv4 address space have gone... ;-(( Anyhow, the danger og creating too many routing table entries by allocating Provider Independent (IPv6) addresses is still exist and should not be overlooked. Best, Géza <div class="gmail_quote">2011/8/18 Andrzej Dopierała <<a href="mailto:undefine@aramin.net">undefine@aramin.net</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> W dniu 18.08.2011 23:42, Turchanyi Geza pisze:<div class="im"> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Second point: if ALL IPv4 PI holder would request IPv6 PI then you might expect another 17K prefixes in the routing table just from the RIPE Region! And this is just the start! </blockquote></div> Most ipv4 PI holders have more than one prefix - when first was not enought - they get another. Few ISP in poland get 3-4 prefixes when they weren't LIR. For ipv6 one prefix is always enought - so 17k is much to much :) Regards, Andrzej </blockquote></div>