[afnog] New RIPE BCOP: IPv6 prefix assignment for end-users - persistent vs non-persistent, and what size to choose

[Randy Bush]

> When you deploy IPv6-only access networks to customers, you need to
> keep some IPv4-only resources, which don’t impact your network (as
> emails servers), in order to test functionalities from transition
> protocols.
> 
> In a recent IETF, I discovered that Outlook for Mac fails with
> IPv4-only emails servers when using NAT64, so that's why I keep them,
> to make sure that I can do testing.
> 
> Of course, I can take more complex alternatives, even having a
> non-production IPv4-only email server, but is not worth the effort,
> because having the production email servers as IPv4-only doesn’t hurt
> anyone.
>
>> IPv4 is over
>     
> you would be more believable if you put your money where your mouth is

qed

all the blah blah blad aside, ipv4 will be with us for another couple of
decades