If you look at Gert Doering's slides that I presented at NANOG (in the IPv6 Deployment Experiences track) I believe it is 1.4 prefixes per ASN in IPv6 and something like 10.5 prefixes per ASN in IPv4. There are also descriptions of the reasons for some of these multiple advertisements in IPv6 as well as how many ASNs have just one and how many have 2 etc. The slides are here http://www.nanog.org/meetings/nanog51/presentations/Monday/NANOG51.Talk13.Ar... Enjoy! -----Cathy On Mon, Feb 7, 2011 at 2:10 PM, Owen DeLong <owen@delong.com> wrote:
On Feb 7, 2011, at 12:19 PM, Matthew Petach wrote:
On Mon, Feb 7, 2011 at 12:04 PM, Owen DeLong <owen@delong.com> wrote:
...
On the other hand, when we can deprecate global routing of IPv4, we will see an earth shattering improvement as the current 10:1 prefix to provider ratio (300,000 prefixes for ~30,000 active ASNs) drops to something more like 2:1 in IPv6 due to providers not having to constantly run back to the RIR for additional slow-start allocations.
Owen
I suspect as we start seeing the CIDR report for IPv6, we'll see that ASNs are announcing considerably more prefixes than that, in order to localize traffic better. I don't think it'll be 300,000 prefixes, but I'd be willing to bet it'll be more than 100,000--not exactly "earth shattering improvement".
Matt (hopeless deaggregator)
Currently: 3,134 IPv6 ASNs active. Currently: 4,265 IPv6 prefixes.
Looks like less than 2:1 to me.
That's as close as I think I can get to an IPv6 CIDR report for the moment.
Owen