Hi, Jan and all, As RFC3849 specified, the prefix reserved for documentation is a /32  block, 2001:DB8::/32 while people can use the following: net A = 2001:db8:1::/48 net B = 2001:db8:2::/48 net C = 2001:db8:3::/48 <div id="signEditor"></div>we can also use net A = 2001:db8:1::/48 net B = 2001:db8:8000::/48 net C = 2001:db8:a000::/48 for being easy recognized as separated networks. The only shortcoming that I can think of is, because 2001:db8::/32 is one big block, when being used to describe inter-domain network topology, /32 address block may easily be considered as all networks belong to one organization. Any comment? I also cc:ed this email to the co-author of RFC3849, G.Huston, Chief Scientist from APNIC, for further discussion. Best regards, --MA Yan <div style="FONT: 9pt ">----- reply email -----<div style="BACKGROUND: #e4e4e4; font-color: black">Sender:Jan Zorz @ go6.si <jan@go6.si></div><div>Recipient:bcop <bcop@ripe.net></div><div>Time:08/21/2014 22:11:55</div><div>Subject:[bcop] Fwd: [Bcop-gc] documentation ipv6 prefix</div></div> <blockquote style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0mm; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0mm; MARGIN: 5pt 0mm 5pt 3.75pt; BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0mm; BORDER-BOTTOM: medium none"><div class="bodyclass"> Dear RIPE BCOP community, I got a question from Seiichi Kawamura, JANOG BCOP co-chair and I think this suggestion/question would be best if discussed here on this mailing list (and maybe also on IPv6 WG ml). Please read below. Cheers, Jan -------- Original Message -------- Date: Tue, 19 Aug 2014 10:04:56 +0900 From: Seiichi Kawamura <kawamucho@mesh.ad.jp> Fellow BCOPers Hi there. Some folks in Japan, especially tech bloggers and tech documentation producers are saying that we need more ipv6 documentation prefix than just 2001:db8::/32 When describing a classic 3 prefix network topology they would use net A = 2001:db8:1::/48 net B = 2001:db8:2::/48 net C = 2001:db8:3::/48 where as with v4, net A = 192.0.2.0/24 net B = 198.51.100.0/24 net C = 203.0.113.0/24 The 3 IPv6 prefixes are too similar and it's intuitively hard to tell if the 3 prefixes are talking about a network, or is it 3 separate networks. I guess this is bad especially for educational tutorial documentation. So I'm thinking that if there are 2 more prefixes defined as documentation, I would say that's enough. We can maybe even revive 3ffe:: and make that documentation purpose. However, I'm intersted in hearing opinions from other regions. Do you think there are any such needs in your region? -Seiichi _______________________________________________ Bcop-gc mailing list Bcop-gc@elists.isoc.org https://elists.isoc.org/mailman/listinfo/bcop-gc </div></blockquote>