nanog mailing list archives

Re: Q: is RFC3531 still applicable?


From: Jay Acuna <mysidia () gmail com>
Date: Wed, 15 May 2024 23:52:24 -0500

A /64 is not "enough" period.  Each IPv6 /64 should be thought of as
the same as an IPv4 /32.
The RFC is still relevant.  You are able to be allocated IPs
justifying 8-bits per customer
(/56) and customers should expect that /56 be the minimum delegated by
their providers.

The prefix delegation for IPv6 is based on number of separate /64
subnets they might have a reason
to use (which can be for many reasons including security and division
of traffic and use cases),

Not number of individual hosts they may have, since subnet divisions
more granular than
/64 are not possible.

On Wed, May 15, 2024 at 8:17 AM Mel Beckman <mel () beckman org> wrote:
I never could understand the motivation behind RFC3531. Just assign /64s. A single /64 subnet has 
18,446,744,073,709,551,616  host addresses.  It is enough. Period.
 -mel

--
-J


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