DNS Glue Requirements in Referral Responses

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Publisher: IETF
Doc Type: Standard
Pages: 9
Abstract: The DNS uses glue records to allow iterative clients to find the addresses of name servers that are contained within a delegated zone. Authoritative servers are expected to return all available glue records for in-domain name servers in a referral response. If message size constraints prevent the inclusion of all glue records for in-domain name servers, the server must set the TC (Truncated) flag to inform the client that the response is incomplete and that the client should use another transport to retrieve the full response. This document updates RFC 1034 to clarify correct server behavior.
Publication Date: 2023-09-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9471
Link: https://doi.org/10.17487/RFC9471
Author(s): Mark P. Andrews
Shumon Huque
Paul Wouters
Duane Wessels
Keyword(s): Glue Record

Latest version of IETF RFC 9471

Document Versions — IETF RFC 9471

▶ IETF RFC 9471 (2023-09-01)

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Normative Reference(s)

IETF RFC 1034 [Active*]
IETF RFC 1035 [Active, Amended*]
IETF RFC 2119 [Active*]
IETF RFC 8174 [Active*]

Bibliographic Reference(s)

ICANN, "Centralized Zone Data Service", <https://czds.icann.org/>. EXTERNAL
Various DNS software and service providers, "DNS Flag Day 2020", October 2020, <https://dnsflagday.net/2020/>. EXTERNAL
Wikipedia, "dig (command)", September 2023, <https://en.wikipedia.org/wiki/Dig_(command)>. EXTERNAL
IETF RFC 2931 [Active*]
IETF RFC 4033 [Active*]
IETF RFC 4034 [Active*]
IETF RFC 4035 [Active*]
IETF RFC 6891 [Active*]
IETF RFC 8499 [Superseded*]
IETF RFC 8945 [Active*]

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doi: 10.17487/RFC9471
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Referenced By

IETF RFC 10001 [Active*]
IETF RFC 9499 [Active*]