North American Network Operators Group
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Re: v6 subnet size for DSL & leased line customers

  • From: Randy Bush
  • Date: Wed Dec 19 22:28:28 2007 
> I work on a network with 100K+ DSL folks and 200+ leased line
> customers, plus some other stuff.  The leased line customers are
> increasing dramatically.  I should plan for a /64 for every DSL
> customer and a /48 for every leased line customer I expect over the
> next 5-7 years?

why not a /56 by default for both, and give them an opportunity to
justify more?

a /64 is a bit old-think unless you are having cost issues getting your
space from above.

randy