Understood, yes, but I should have been more clear: I'm talking about statically allocating my own internal /64s out of the /56 I've reserved for my org's own use. Is there any point in using a more complex scheme than just "next!" ?-Adam
From: Nicolas VUILLERMET <nicolas@vuillermet.bzh>
Sent: Wednesday, May 15, 2024 7:31:31 AM
To: Mel Beckman <mel@beckman.org>; Adam Thompson <athompson@merlin.mb.ca>
Cc: nanog <nanog@nanog.org>
Subject: Re: Q: is RFC3531 still applicable?Hello,
The minimum addressable on a LAN is a /64. So you have to provide the customer with a larger subnet.
Public operators in France generally deliver a /60.
The RFC gives /56, however, as customers are mobile and there is a risk of disaggregating into PAs (or rather allowing the customer to keep his IPs, such as DID portability), we, as operators, supply /48s directly.
Talking about the number of IPs that can be assigned in IPv6 shows a lack of understanding of IPv6. It's time to get trained!
My 2 cents,Nicolas VUILLERMET
Network Engineer... and IPv6 ready.
On 14/05/2024 22:12, Mel Beckman 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
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
Consultant, Infrastructure Services
MERLIN
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Winnipeg, MB R3T 6A8
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