RFC 9927 · PROPOSED STANDARD · 2026
MON · 27 JUL 2026
Fixing the C-Flag in the Extended Address Registration Option
Overview
RFC 9927, “Fixing the C-Flag in the Extended Address Registration Option”, is a Proposed Standard document published in February 2026 by P. Thubert, A. Rashid. It updates RFC 8928. The canonical text is published by the RFC Editor.
Abstract
This document updates "Address-Protected Neighbor Discovery for Low-Power and Lossy Networks" (RFC 8928) by changing the position of the C-flag in the Extended Address Registration Option (EARO) and registering it with IANA.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 9927 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
Relationships to other RFCs
Other RFCs from 2026
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- RFC 9929 IGP Unreachable Prefix Announcement
- RFC 9924 Advanced Professional Video
- RFC 9930 Tunnel Extensible Authentication Protocol Version 1
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