Re: IPv4 flag day

[brent saner via NANOG <nanog () lists nanog org>]

On Fri, Jun 19, 2026, 16:48 Gary Sparkes via NANOG <nanog () lists nanog org>
wrote:

> ULA is the equivalent of RFC1918, effectively. FC00::/7
>
> You’re thinking of link-local addresses which are the fe80 addresses.
> Those are autogenerated. ULA is assigned however you want – SLAAC, DHCPv6,
> static, etc…. RFC1918 equivalent.
>
> Nominally, you’d almost never think about link-local.
>
> You essentially have all of fc00::/7 to utilize as you wish.
> (SNIP)


I didn't see it mentioned yet but I'm skimming-

but this should be fd00::/8. The first /8 in fc00::/7 is reserved (ref. RFC
4193 § 3.1, 3.2, "L" bit).
_______________________________________________
NANOG mailing list 
https://lists.nanog.org/archives/list/nanog () lists nanog org/message/EGA6RAUZ6UBKGJXRJGFEQCEEQYCPGSDL/