ISP customer assignments

Thu Oct 8 10:46:47 UTC 2009

> There seems to be a variance between "It's OK to just give out a /64" to
> "You better be thinking about giving out a /48". I can live in those
> boundaries and am most likely fine with either. I'm leaning toward a /56
> for regular subscribers and a /48 only for business or large scale
> customers, and undecided on dial-up. How does this sound?

The starting point is to give everybody a /48 per site. If a business customer
has 3 sites, then give them enough space for a /48 for each site. Could be
3 /48s or could be a /46.

But, if you have a lot of residential customers, it is quite
reasonable to give them
a /56 per site instead. Be prepared for some customers to ask for two
/56s because
they have a granny-flat or in-law apartment in the house. Also be
prepared for some
to ask for a /48 because they are running a business at home, or they
are technical
types who have a their own home network lab.

Your plan for /56 to residential subscribers and /48 to business
subscribers sounds
perfectly fine as long as your systems have some way to accomodate
that grey area,
either by recording a /48 against a residential subscriber or counting
them as a class
of business customer that pays a residential rate.

Charging a customer extra for more IPv6 addresses just will not fly in
a competitive
market.

--Michael Dillon