rfc9926v4.txt		rfc9926.txt
	Internet Engineering Task Force (IETF) P. Thubert, Ed.		Internet Engineering Task Force (IETF) P. Thubert, Ed.
	Request for Comments: 9926 January 2026		Request for Comments: 9926 February 2026
	Updates: 4861, 6550, 8505, 8928, 9010		Updates: 4861, 6550, 8505, 8928, 9010
	Category: Standards Track		Category: Standards Track
	ISSN: 2070-1721		ISSN: 2070-1721
	Prefix Registration for IPv6 Neighbor Discovery		Prefix Registration for IPv6 Neighbor Discovery
	Abstract		Abstract
	This document updates IPv6 Neighbor Discovery (RFC 4861) and IPv6		This document updates IPv6 Neighbor Discovery (RFC 4861) and IPv6
	Subnet Neighbor Discovery (RFC 8505, RFC 8928) to enable a node that		Subnet Neighbor Discovery (RFC 8505, RFC 8928) to enable a node that
	skipping to change at line 904 ¶		skipping to change at line 904 ¶
	12.2. Application to RPL-Based Route-Over LLNs		12.2. Application to RPL-Based Route-Over LLNs
	This specification also updates [RFC6550] and [RFC9010] in the case		This specification also updates [RFC6550] and [RFC9010] in the case
	of a route-over multilink subnet based on the RPL routing protocol,		of a route-over multilink subnet based on the RPL routing protocol,
	to add multicast ingress replication in Non-Storing Mode and anycast		to add multicast ingress replication in Non-Storing Mode and anycast
	support in both Storing and Non-Storing modes. A 6LR that implements		support in both Storing and Non-Storing modes. A 6LR that implements
	the RPL extensions specified therein MUST also implement [RFC9010].		the RPL extensions specified therein MUST also implement [RFC9010].
	Figure 5 illustrates the classical situation of an LLN as a single		Figure 5 illustrates the classical situation of an LLN as a single
	IPv6 subnet, with a 6LoWPAN Border Router (6LBR) that acts as Root		IPv6 subnet, with a 6LoWPAN Border Router (6LBR) that acts as Root
	for RPL operations and as Address Registrar for 6LowPAN ND.		for RPL operations and as Address Registrar for 6LoWPAN ND.
	.- -- .		.- -- .
	.-( ).		.-( ).
	( Internet )		( Internet )
	(___.________.___)		(___.________.___)
	|		|
	---+-------+--		---+-------+--
	|		|
	+--------+		+--------+
	| 6LBR |		| 6LBR |
End of changes. 2 change blocks.
	2 lines changed or deleted		2 lines changed or added
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