On Oct 8, 2014, at 9:18 PM, Erik Sundberg <ESundberg@nitelusa.com> wrote:
I am planning out our IPv6 deployment right now and I am trying to figure out our default allocation for customer LAN blocks. So what is everyone giving for a default LAN allocation for IPv6 Customers. I guess the idea of handing a customer /56 (256 /64s) or a /48 (65,536 /64s) just makes me cringe at the waste. Especially when you know 90% of customers will never have more than 2 or 3 subnets. As I see it the customer can always ask for more IPv6 Space.
/64 /60 /56 /48
Small Customer? Medium Customer? Large Customer?
Thanks
Erik
Erik, Selection of a default prefix is easy. Here are the steps. 1. Design your address allocation systems using /48. 2. Estimate your ongoing address management costs using /48. 3. For each +4 in prefix length, estimate doubling your long term address management costs. 4. Keeping in mind 4.1 Prefixes longer than somewhere around /48 to /56 may be excluded from the global routing table 4.2 Your customers want working Internet connections 4.3 You want income at a minimum of ongoing expense make a sensible business decision. Easy-peasy. James R. Cutler James.cutler@consultant.com PGP keys at http://pgp.mit.edu