IXFR-ONLY to Prevent IXFR Fallback to AXFR

Document Type Expired Internet-Draft (individual)
Last updated 2010-02-26
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This documents proposes a new QTYPE (Query pseudo RRtype) for the Domain Name System (DNS). IXFR-ONLY is a variant of IXFR (RFC 1995) that allows an authoritative server to incrementally update zone content from another (primary) server without falling back from IXFR to AXFR. This way, alternate peers can be contacted more quickly and convergence of zone content may be achieved much faster in important, resilient operational scenarios.


Ondřej Surý (ondrej.sury@nic.cz)
Shane Kerr (shane@isc.org)

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