maximum ipv4 bgp prefix length of /24 ?

Thu Oct 5 19:13:40 UTC 2023

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.

Owen

> On Oct 4, 2023, at 23:30, Mark Tinka <mark at tinka.africa> wrote:
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> 
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> On 10/5/23 08:24, Geoff Huston wrote:
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> 
>> The IPv6 FIB is under the same pressure from more specifics. Its taken 20 years to get there, but the IPv6 FIB is now looking stable at 60% opf the total FIB size [2]. For me, thats a very surprising outcome in an essentially unmanaged system. 
> 
> Were you expecting it to be lower than IPv4?
> 
> Mark.