On 11-mei-04, at 12:17, amar wrote:
Still, a /20 allows for 268435456 /48s. Is Telia really going to give half of the inhabitants of Europe a /48?
I fully understand Your point of view.
No point of view, just asking.
P 48-P Total/48s Threshold Util% ------------------------------------- 20 28 268435456 5534417 2.1%
It is all based on RFC3194. Do You suggest that the HD-Ratio in RFC3194 should be changed?
The HD ratio is based on assumptions. We should base our policies on fact. The trouble with the HD ratio is that it assumes that one out of every five digits is lost due to aggregation boundaries. That assumption may hold occasionally, but it certainly won't as a general rule. This is especially true in IPv6, where the address length is very long. With 45 bits between the 2000::/3 and the subnet edge that's 9 bits that are lost. I think that's excessive. See http://www.bgpexpert.com/archive2003q3.php#12 (at the bottom) for some additional text on this. Now I don't have a very good idea about realistic aggregation levels in very large IPv6 ISP networks. If you can shed some light on this, that would be very useful.