On Oct 8, 2014, at 9:18 PM, Erik Sundberg <[email protected]> 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
[email protected]
PGP keys at http://pgp.mit.edu
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