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Status:

INTERNET STANDARD

Obsoletes:

RFC 2671,RFC 2673

Authors:

J. Damas
M. Graff
P. Vixie

Stream:

IETF

Source:

dnsext (int)

Cite this RFC:TXT  | XML  |  BibTeX

DOI:  https://doi.org/10.17487/RFC6891

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Abstract

The Domain Name System's wire protocol includes a number of fixedfields whose range has been or soon will be exhausted and does notallow requestors to advertise their capabilities to responders. Thisdocument describes backward-compatible mechanisms for allowing theprotocol to grow.

This document updates the Extension Mechanisms for DNS (EDNS(0))specification (and obsoletes RFC 2671) based on feedback fromdeployment experience in several implementations. It also obsoletesRFC 2673 ("Binary Labels in the Domain Name System") and addsconsiderations on the use of extended labels in the DNS.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.