Validate a router redirect
04A redirect can indicate a better first hop, but acceptance is constrained by the existing local routing context.
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DIAGRAM§ 8.1 ↗
RFC 4861 · § 8.1EXAMPLE
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03
Reject a redirect whose sender fails the required first-hop checks.
Reject a redirect whose sender fails the required first-hop checks.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
The sender must be the current first-hop router for the destination.
- The sender must be the current first-hop router for the destination.
- Required checks include link-local source and Hop Limit 255; an arbitrary distant sender cannot be accepted as a redirect authority.
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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