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

  • From: Scott Weeks
  • Date: Wed Dec 19 22:17:10 2007 

Disclaimer:  I'm still very much an IPv6 wussie...  :-)

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But even in 2000 the policy was and still is:
 /128 for really a single device
 /64  if you know for sure that only one single subnet will
      ever be allocated.
 /48  for every other case (smart bet, should be used per default)
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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?

scott