On 6 Oct 2023, at 6:13 am, Owen DeLong <owen@delong.com> wrote:
Ratio of FIB to RIB is only part of the equation.
IPv6 is NOT under the disaggregation pressure that IPv4 is under because there is no pressure (other than perhaps scarcity mentality from those that don’t properly understand IPv6) to dense-pack IPv6 assignments or undersize IPv6 allocations.
Look at the difference in prefixes per ASN across the two tables and that tells a much grimmer story for IPv4 in terms of RIB growth vs. IPv6.
hmm - IPv4 is at [1], IPv6 is at [2] Now I’m trying to understand what your grimmer story for IPv4 might be here Owen. Since 2005 the number of IPv4 FIB entries per origin AS has increased fropm 8 to 12 in the past 20 years - or a 50% increase. Over ther same period the number of IPv6 prefix advertisements per origin AS has increased from 1.5 to 6, or a fourfold increase. If anything, the IPv6 story appears to me to be a far greater cause for concern, but you may have a different interpretation of this data. Geoff [1] https://bgp.potaroo.net/cgi-bin/plota?file=%2fvar%2fdata%2fbgp%2fas2%2e0%2fbgp%2dentries%2das%2etxt&descr=Average%20entries%20per%20origin%20AS&ylabel=Average%20entries%20per%20origin%20AS&with=step@%82%966%88U [2] https://bgp.potaroo.net/cgi-bin/plota?file=%2fvar%2fdata%2fbgp%2fv6%2fas2%2e0%2fbgp%2dentries%2das%2etxt&descr=Average%20entries%20per%20origin%20AS&ylabel=Average%20entries%20per%20origin%20AS&with=step