BCP: Slicing a /32 for an ISP

Sander Steffann s.steffann at computel.nl
Tue Apr 15 15:43:50 CEST 2008

Hi Michael,

> Another point I'm thinking about is: what shall I give to our
> residential
> custumors? A /64 would be sufficient for most of them as there is
> usually only one PC/Mac. A /56 would match every constellation I can
> imagine today. A /48 would fit the 'No questions asked' rule. So
> why not a /48 for every residential custumer? Or is this to wasteful?

Not at all. A /48 is fine, and it follows the current IAB/IESG
recommendation (rfc 3177). Some say it is too wasteful. At this time I can't
see home networks needing more than 256 subnets, but I can't predict the

- Sander

More information about the ipv6-ops mailing list