RFC 9131

Gratuitous Neighbor Discovery: Creating Neighbor Cache Entries on First-Hop Routers, October 2021

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RFC 4861
J. Linkova
6man (int)

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DOI:  https://doi.org/10.17487/RFC9131

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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.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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