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

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…

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Outgoing relationships (8 related RFCs)

Obsoletes, Normative reference — RFC 2671: Extension Mechanisms for DNS (EDNS0)
Obsoletes, Informative reference — RFC 2673: Binary Labels in the Domain Name System
Normative reference — RFC 2119: Key words for use in RFCs to Indicate Requirement Levels
Normative reference — RFC 1035: Domain names - implementation and specification
Normative reference — RFC 3225: Indicating Resolver Support of DNSSEC
Informative reference — RFC 5625: DNS Proxy Implementation Guidelines
Informative reference — RFC 3363: Representing Internet Protocol version 6 (IPv6) Addresses in the Domain Name System (DNS)
Informative reference — RFC 3364: Tradeoffs in Domain Name System (DNS) Support for Internet Protocol version 6 (IPv6)

Incoming relationships (30 related RFCs)

Normatively referenced by — RFC 9499: DNS Terminology
Normatively referenced by — RFC 7766: DNS Transport over TCP - Implementation Requirements
Normatively referenced by — RFC 8094: DNS over Datagram Transport Layer Security (DTLS)
Normatively referenced by — RFC 7871: Client Subnet in DNS Queries
Normatively referenced by — RFC 7873: Domain Name System (DNS) Cookies
Normatively referenced by — RFC 8914: Extended DNS Errors
Normatively referenced by — RFC 7719: DNS Terminology
Normatively referenced by — RFC 7828: The edns-tcp-keepalive EDNS0 Option
Normatively referenced by — RFC 7830: The EDNS(0) Padding Option
Normatively referenced by — RFC 8109: Initializing a DNS Resolver with Priming Queries
Normatively referenced by — RFC 6975: Signaling Cryptographic Algorithm Understanding in DNS Security Extensions (DNSSEC)
Normatively referenced by — RFC 7314: Extension Mechanisms for DNS (EDNS) EXPIRE Option
Normatively referenced by — RFC 8764: Apple's DNS Long-Lived Queries Protocol
Normatively referenced by — RFC 9664: An EDNS(0) Option to Negotiate Leases on DNS Updates
Normatively referenced by — RFC 9715: IP Fragmentation Avoidance in DNS over UDP
Normatively referenced by — RFC 8906: A Common Operational Problem in DNS Servers: Failure to Communicate
Normatively referenced by — RFC 9609: Initializing a DNS Resolver with Priming Queries
Normatively referenced by — RFC 9660: The DNS Zone Version (ZONEVERSION) Option
Normatively referenced by — RFC 9824: Compact Denial of Existence in DNSSEC
Normatively referenced by — RFC 10001: Operational Guidelines for DNS Transport in Mixed IPv4/IPv6 Environments
Normatively referenced by — RFC 10029: DNS Multiple QTYPEs
Informatively referenced by — RFC 9471: DNS Glue Requirements in Referral Responses
Informatively referenced by — RFC 8165: Design Considerations for Metadata Insertion
Informatively referenced by — RFC 9103: DNS Zone Transfer over TLS
Informatively referenced by — RFC 8767: Serving Stale Data to Improve DNS Resiliency
Informatively referenced by — RFC 9567: DNS Error Reporting
Informatively referenced by — RFC 7720: DNS Root Name Service Protocol and Deployment Requirements
Informatively referenced by — RFC 9170: Long-Term Viability of Protocol Extension Mechanisms
Informatively referenced by — RFC 9520: Negative Caching of DNS Resolution Failures
Informatively referenced by — RFC 9413: Maintaining Robust Protocols