Over sub at around 20-40 to 1 is very easy now. With PBA, DET-NAT and other tools, the average customer largely doesn’t know it is happening and it solves for many provider side issues as well (logging being the biggest). For those customers who have issues, the over-sub ratios leave IPv4 space for those corner cases and/or native IPv6 should be made available.
And before anyone yells that this "breaks something,” It was already broken. > On Aug 25, 2020, at 11:46 PM, Mark Tinka <mark.ti...@seacom.com> wrote: > > > > On 25/Aug/20 22:40, Brian Johnson wrote: > >> I usually solve this problem by designing for NAT444 and dual-stack. This >> solves both problems and allows for users to migrate as they are able/need >> to. If you try and force the change, you will loose users. > > At some point, you run out of IPv4. > > You could cascade to a high degree of NAT444, but then it gets hairy, > and costly, at some point. > > Mark.
