Observed DNS Resolution Misbehavior
RFC 4697, “Observed DNS Resolution Misbehavior”, is a Best Current Practice document published in October 2006 by M. Larson, P. Barber. It has since been updated by RFC 9520. The canonical text is published by the RFC Editor.
Abstract
This memo describes DNS iterative resolver behavior that results in a significant query volume sent to the root and top-level domain (TLD) name servers. We offer implementation advice to iterative resolver developers to alleviate these unnecessary queries. The recommendations made in this document are a direct byproduct of observation and analysis of abnormal query traffic patterns seen at two of the thirteen root name servers and all thirteen com/net TLD name servers. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
What “Best Current Practice” means
Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.
The canonical text of RFC 4697 is hosted at rfc-editor.org. Available in TXT,HTML.
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