Check a tentative address for duplicates
02Duplicate Address Detection uses Neighbor Discovery before assigning a tentative unicast address.
Terms in this drawing
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 5.4 ↗
RFC 4862 · § 5.4EXAMPLE
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03
A conflicting advertisement stops assignment of that address.
A conflicting advertisement stops assignment of that address.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
RFC 2462RFC 4862 Appendix C
The revision recommends Duplicate Address Detection for all unicast addresses rather than relying on an earlier link-local-only check.
Read the updated RFC section ↗A DAD solicitation uses the unspecified source address and omits the source-link-layer-address option.
- A DAD solicitation uses the unspecified source address and omits the source-link-layer-address option.
- A detected duplicate must not be assigned to the interface.
The drawing is a simplified worked example. Follow the linked RFC and its updates for implementation requirements.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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