Side effect of DNSSEC: an increase of DS queries

Document Type Expired Internet-Draft (individual)
Author Kazunori Fujiwara 
Last updated 2014-07-24 (latest revision 2014-01-20)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


An increase of periodic DS queries is observed at top level domain (TLD) DNS servers. The reason of the increase is low NCACHE TTL value and DS nonexistence. This memo presents issues with DNSSEC and small NCACHE TTL value, including possible countermeasures in order to prepare future increase of DS queries.


Kazunori Fujiwara (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)