RFC 4861: Neighbor Discovery for IP version 6 (IPv6)
In plain English — editorial summary, not part of the RFC
This document specifies the Neighbor Discovery protocol for IP Version 6. IPv6 nodes on the same link use Neighbor Discovery to discover each other's presence, to determine each other's link-layer addresses, to find routers, and to maintain reachability information about the paths to active neighbors. [STANDARDS-TRACK]
Document record
- Document ID
- RFC4861
- Published
- September 2007
- Authors
- T. Narten; E. Nordmark; W. Simpson; H. Soliman
- Status
- DRAFT STANDARD
- Stream
- IETF
- Area
- int
- Pages
- 97
- Also known as
- —
- Obsoletes:
- RFC 2461
Topics
Standards lineage
This document is one revision in a chain of 3 RFCs, each formally replacing the one before it.
- RFC 1970 (1996)
- RFC 2461 (1998)
- RFC 4861 (2007)
Read the full history of Neighbor Discovery for IP version 6 (IPv6) →
Referenced by
12 later RFCs formally update or obsolete part of this document.
- RFC 5942IPv6 Subnet Model: The Relationship between Links and Subnet PrefixesCurrent
July 2010
- RFC 6980Security Implications of IPv6 Fragmentation with IPv6 Neighbor DiscoveryCurrent
August 2013
- RFC 7048Neighbor Unreachability Detection Is Too ImpatientCurrent
January 2014
- RFC 7527Enhanced Duplicate Address DetectionCurrent
April 2015
- RFC 7559Packet-Loss Resiliency for Router SolicitationsCurrent
May 2015
- RFC 8028First-Hop Router Selection by Hosts in a Multi-Prefix NetworkCurrent
November 2016
- RFC 8319Support for Adjustable Maximum Router Lifetimes per LinkCurrent
February 2018
- RFC 8425IANA Considerations for IPv6 Neighbor Discovery Prefix Information Option FlagsCurrent
July 2018
- RFC 9131Gratuitous Neighbor Discovery: Creating Neighbor Cache Entries on First-Hop RoutersCurrent
October 2021
- RFC 9685Listener Subscription for IPv6 Neighbor Discovery Multicast and Anycast AddressesCurrent
November 2024
- RFC 9762Using Router Advertisements to Signal the Availability of DHCPv6 Prefix Delegation to ClientsCurrent
June 2025
- RFC 9926Prefix Registration for IPv6 Neighbor DiscoveryCurrent
February 2026
Related documents
Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.
- RFC 3122Extensions to IPv6 Neighbor Discovery for Inverse Discovery SpecificationCurrent
June 2001
- RFC 3077A Link-Layer Tunneling Mechanism for Unidirectional LinksCurrent
March 2001
- RFC 4882IP Address Location Privacy and Mobile IPv6: Problem StatementCurrent
May 2007
- RFC 4636Foreign Agent Error Extension for Mobile IPv4Current
October 2006
- RFC 4477Dynamic Host Configuration Protocol (DHCP): IPv4 and IPv6 Dual-Stack IssuesCurrent
May 2006
- RFC 4436Detecting Network Attachment in IPv4 (DNAv4)Current
March 2006
- RFC 4433Mobile IPv4 Dynamic Home Agent (HA) AssignmentCurrent
March 2006
- RFC 4292IP Forwarding Table MIBCurrent
April 2006
Also filed under
About this page
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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