Reaction of Stateless Address Autoconfiguration (SLAAC) to Renumbering Events

The information below is for an old version of the document
Document Type Expired Internet-Draft (individual)
Authors Fernando Gont  , Jan Zorz 
Last updated 2019-08-22 (latest revision 2019-02-18)
Replaced by draft-ietf-6man-slaac-renum
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


In scenarios where network configuration information related to IPv6 prefixes becomes invalid without any explicit signaling of that condition (such as when a CPE crashes and reboots without knowledge of the previously-employed prefixes), nodes on the local network will continue using stale prefixes for an unacceptably long period of time, thus resulting in connectivity problems. This document analyzes these problem scenarios, and proposes workarounds to improve network robustness. This document updates RFC4861 and RFC4862 to allow for a more robust reaction to network configuration changes.


Fernando Gont (
Jan Zorz (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)