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CurrentINTERNET STANDARDIETF streamSTD75

RFC 6891: Extension Mechanisms for DNS (EDNS(0))

In plain English — editorial summary, not part of the RFC

The Domain Name System's wire protocol includes a number of fixed fields whose range has been or soon will be exhausted and does not allow requestors to advertise their capabilities to responders. This document describes backward-compatible mechanisms for allowing the protocol to grow. This document updates the Extension Mechanisms for DNS (EDNS(0)) specification (and obsoletes RFC 2671) based on feedback from deployment experience in several implementations. It also obsoletes RFC 2673 ("Binary Labels in the Domain Name System") and adds considerations on the use of extended labels in the DNS.

Document record

Document ID
RFC6891
Published
April 2013
Authors
J. Damas; M. Graff; P. Vixie
Status
INTERNET STANDARD
Stream
IETF
Area
int
Pages
16
Also known as
STD75
Obsoletes:
RFC 2671, RFC 2673

Topics

Standards lineage

This document is one revision in a chain of 3 RFCs, each formally replacing the one before it.

  1. RFC 2671 (1999)
  2. RFC 2673 (1999)
  3. RFC 6891 (2013)

Read the full history of Extension Mechanisms for DNS (EDNS(0)) →

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/6891-extension-mechanisms-for-dns-edns-0