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
Get Outlook for Android<https://aka.ms/AAb9ysg> ________________________________ From: Nicolas VUILLERMET <nico...@vuillermet.bzh> Sent: Wednesday, May 15, 2024 7:31:31 AM To: Mel Beckman <m...@beckman.org>; Adam Thompson <athomp...@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 <athomp...@merlin.mb.ca><mailto:athomp...@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 100 - 135 Innovation Drive Winnipeg, MB R3T 6A8 (204) 977-6824 or 1-800-430-6404 (MB only) https://www.merlin.mb.ca<https://www.merlin.mb.ca/> Chat with me on Teams<https://teams.microsoft.com/l/chat/0/0?users=athomp...@merlin.mb.ca>
