Re: IPv4 flag day

["Aaron C. de Bruyn via NANOG" <nanog () lists nanog org>]

On Fri, Jun 19, 2026 at 12:06 PM Gary Sparkes via NANOG <
nanog () lists nanog org> wrote:

> Internal clients are 1:1 NPT'd to provider addresses, and on failover, the
> internal addressing doesn't change, but all the traffic flips to the other
> provider's addresses.

And now we've got to have a mechanism to update external DNS for the SMB or
Enterprise that hosts their own MX, a remote access server, and all those
SSH port forwards the IT guys use to remotely access/manage stuff.

I thought I was promised an IPv6 where there were so many dang addresses
that every business could have their own *public* /48 with enough room left
over to allocate a /48 to every molecule on the planet or whatever.

I don't want to renumber everything because I ditch one ISP and switch to
another.
In IPv4 I don't have to thanks to RFC1918 space.
In IPv6 I guess I have fc00::/7 that gets allocated "pseudo-randomly".

So in IPv6 I either have to renumber because I ditched some ISP for
another...or I have to pay for my addressing space and my ISPs have to
support routing my address space, right?

-A
_______________________________________________
NANOG mailing list 
https://lists.nanog.org/archives/list/nanog () lists nanog org/message/WKVQVUCDQTR2Y2EAJGEYEK3FQNUHDUET/