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ENUM Requirement for EDNS0 Support

Document Type Expired Internet-Draft (enum WG)
Authors Jim Reid , Lawrence W. Conroy
Last updated 2015-10-14 (Latest revision 2006-09-06)
Replaces draft-conroy-enum-edns0
Stream Internet Engineering Task Force (IETF)
Intended RFC status Best Current Practice
Expired & archived
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired (IESG: Dead)
Action Holders
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD Gonzalo Camarillo
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Support for EDNS0 (Extension Mechanisms for DNS) is mandated in this document for DNS entities querying for or serving NAPTR records. In general those entities will be supporting ENUM resolution. This requirement is needed because DNS responses to ENUM-related queries generally return large RRSets. Without EDNS0 support these lookups would result in truncated responses and repeated queries over TCP transport. That has a severe impact on DNS server load and on the latency of those queries. This document adds an operational requirement to use of the protocol standardised in RFC 3761.


Jim Reid
Lawrence W. Conroy

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