Reaction of Stateless Address Autoconfiguration (SLAAC) to Flash- Renumbering Events

Document Type Replaced Internet-Draft (individual)
Authors Fernando Gont  , Jan Zorz  , Richard Patterson 
Last updated 2020-02-20
Replaced by RFC 8978
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
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RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-v6ops-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This Internet-Draft is no longer active.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 documents this problem, and discusses operational workarounds that may help to improve network robustness. Additionally, it highlights areas where further work may be needed.


Fernando Gont (
Jan Zorz (
Richard Patterson (

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