Probe a neighbor that may be unreachable
03Neighbor Unreachability Detection checks whether the forward path to a neighbor continues to work.
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DIAGRAM§ 7.3 ↗
RFC 4861 · § 7.3EXAMPLE
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03
A reachability confirmation returns the entry to REACHABLE.
A reachability confirmation returns the entry to REACHABLE.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
REACHABLE, STALE, DELAY, and PROBE are distinct neighbor-cache states.
- REACHABLE, STALE, DELAY, and PROBE are distinct neighbor-cache states.
- A STALE entry can still be used while the reachability procedure progresses.
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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