Re: [nznog] BCP / Guidance on IPv6 prefix size to provide to customers

This has been my difficulty with the advice on IPv6. I do not have any intention to limit customers to the /56, however for passive customers who don’t request more and whom just get their dynamic IP Address from the PPPoE Response should we just hand out /48’s and give everyone their 65,535 subnets. Thinking about the management probably indicates that /48’s everywhere, keep some static pools, and split my /32 in half to reserve internal space and customer space. If I really get to 32k customers then I can probably justify more space for more pops etc. Regards Alexander Alexander Neilson Neilson Productions Limited alexander(a)neilson.net.nz 021 329 681 022 456 2326

On 3/01/2015, at 12:21 pm, Jed Laundry wrote:

Hey,

On 3 Jan 2015 07:59, "Brian E Carpenter" mailto:brian.e.carpenter(a)gmail.com> wrote:

...

All the same, handing out /56s means assuming that your customers never need 257 subnets. That may sound like a lot, but think about possibilities such as large numbers of virtual subnets.

I'm not a "large" customer, but I'm a lazy one. With a /48 I can encode the VLAN tag directly in the address and never worry about lookup spreadsheets again.

(my cloud providers hand over traffic at L2 at both ends of the VLAN numbering range, and VLAN translation implementations are buggy at best)

Thanks, Jed.

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