Re: Q: is RFC3531 still applicable?

[Mel Beckman <mel () beckman org>]

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

On May 14, 2024, at 12:54 PM, Adam Thompson <athompson () merlin mb ca> wrote:


Not an IPv6 newbie by any stretch, but we still aren’t doing it “at scale” and some of you are, so…

For a very small & dense (on 128-bit scales, anyway) network, is RFC3531 still the last word in IPv6 allocation 
strategies?

Right now, we’re just approaching it as “pick the next /64 in the range”, as it all gets aggregated at the BGP border 
anyway, and internally if I really try hard, I might get to 200 subnets someday.

Is there any justification for the labour in doing something more complex like center-allocation in my situation?  
Worrying about allocation strategies seems appropriate to me if you have 100,000 subnets, not 100.

Opinions wanted, please.
-Adam

Adam Thompson
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MERLIN
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