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RFC 9131: Gratuitous Neighbor Discovery: Creating Neighbor Cache Entries on First-Hop Routers

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

Neighbor Discovery (RFC 4861) is used by IPv6 nodes to determine the link-layer addresses of neighboring nodes as well as to discover and maintain reachability information. This document updates RFC 4861 to allow routers to proactively create a Neighbor Cache entry when a new IPv6 address is assigned to a node. It also updates RFC 4861 and recommends that nodes send unsolicited Neighbor Advertisements upon assigning a new IPv6 address. These changes will minimize the delay and packet loss when a node initiates connections to an off-link destination from a new IPv6 address.

Document record

Document ID
RFC9131
Published
October 2021
Authors
J. Linkova
Status
PROPOSED STANDARD
Stream
IETF
Area
int
Pages
20
Also known as
—
Updates:
RFC 4861

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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/9131-gratuitous-neighbor-discovery-creating-neighbor-cache-entries-on-first-hop-route