address fragmentation

[Lu Heng via NANOG <nanog () lists nanog org>]

Dear NANOG community,


With the increasing prevalence of address‐space leasing—effectively
operating as “mini‐RIRs” for IP distribution—fragmentation of address
blocks has become a critical concern. How are network operators and
registry practitioners today tackling the challenge of fragmentation in IP
address allocation?


   -

   Are there any comprehensive research studies or white papers that survey
   fragmentation mitigation techniques or propose novel allocation algorithms?
   -

   What best operational practices have emerged for assigning large,
   contiguous prefixes (e.g. /16) rather than multiple smaller blocks (e.g.
   /18s) across diverse networks?
   -

   How do operators handle geo‐locational constraints and customer
   reluctance to renumber when reassigning addresses across multiple regions
   or networks?


Any insights, references, or case studies you can share would be greatly
appreciated.

-- 
--
Kind regards.
Lu
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