RFC 8978

Reaction of IPv6 Stateless Address Autoconfiguration (SLAAC) to Flash-Renumbering Events, March 2021

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Status:
INFORMATIONAL
Authors:
F. Gont
J. Žorž
R. Patterson
Stream:
IETF
Source:
v6ops (ops)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC8978

Discuss this RFC: Send questions or comments to v6ops@ietf.org

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Abstract

In scenarios where network configuration information related to IPv6 prefixes becomes invalid without any explicit and reliable signaling of that condition (such as when a Customer Edge router crashes and reboots without knowledge of the previously employed prefixes), hosts on the local network may continue using stale prefixes for an unacceptably long time (on the order of several days), thus resulting in connectivity problems. This document describes this issue and discusses operational workarounds that may help to improve network robustness. Additionally, it highlights areas where further work may be needed.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.