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RFC 4861 / PROTOCOL MECHANISMS

Resolve a local neighbor address

02

Neighbor Solicitation and Advertisement map an on-link IPv6 neighbor to a link-layer address.

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DIAGRAM§ 7.2 ↗
RFC 4861 · § 7.2EXAMPLE
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Resolve a local neighbor addressNeighbor Solicitation and Advertisement map an on-link IPv6 neighbor to a link-layer address.hostneighborNeighbor cache: INCOMPLETENeighbor Solicitationsolicited-node multicastNeighbor Advertisement + mappingResolve only the on-link next hop, not an arbitrary remote host
03
An appropriate advertisement supplies the mapping for local delivery.

An appropriate advertisement supplies the mapping for local delivery.

Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
KEY POINT

A solicitation normally uses the target’s solicited-node multicast group when resolving its link-layer address.

  • A solicitation normally uses the target’s solicited-node multicast group when resolving its link-layer address.
  • Only an on-link next hop is resolved; remote paths still require routing.
DETAILS

The drawing is a simplified worked example. Follow the linked RFC and its updates for implementation requirements.

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Privacy
All chapters in this RFC
  1. Discover routers and on-link prefixes
  2. Resolve a local neighbor address
  3. Probe a neighbor that may be unreachable
  4. Validate a router redirect
  5. Keep Neighbor Discovery on its trust boundary

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RFC 9700 / CHAPTERS

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