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Unified IPv4-in-IPv6 Softwire Customer Premises Equipment (CPE): A DHCPv6-Based Prioritization Mechanism
RFC 8026

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Document history

Date	By	Action
2026-05-20	(System)	Changed metadata: changed keywords to '['Provisioning', 'Softwire', 'IPv4 over IPv6', 'IPv4 service continuity', 'IPv4 address depletion', 'MAP', 'MAP-T', 'MAP-E', 'DS-Lite', 'Lightweight 4 over 6']' from … Changed metadata: changed keywords to '['Provisioning', 'Softwire', 'IPv4 over IPv6', 'IPv4 service continuity', 'IPv4 address depletion', 'MAP', 'MAP-T', 'MAP-E', 'DS-Lite', 'Lightweight 4 over 6']' from '[]'
2026-05-20	(System)	Metadata update from RFC Editor
2026-05-20	(System)	Changed author "I. Farrer": changed name from "Ian Farrer" to "I. Farrer", cleared country (was "Germany"), changed order from "1" to "2"
2026-05-20	(System)	Changed author "M. Boucadair": changed name from "Mohamed Boucadair" to "M. Boucadair", cleared country (was "France"), changed order from "0" to "1"
2026-05-20	(System)	Metadata update from RFC Editor
2016-11-17	(System)	IANA registries were updated to include RFC8026
2016-11-15	(System)	Received changes through RFC Editor sync (created alias RFC 8026, changed title to 'Unified IPv4-in-IPv6 Softwire Customer Premises Equipment (CPE): A DHCPv6-Based Prioritization Mechanism', … Received changes through RFC Editor sync (created alias RFC 8026, changed title to 'Unified IPv4-in-IPv6 Softwire Customer Premises Equipment (CPE): A DHCPv6-Based Prioritization Mechanism', changed abstract to 'In IPv6-only provider networks, transporting IPv4 packets encapsulated in IPv6 is a common solution to the problem of IPv4 service continuity. A number of differing functional approaches have been developed for this, each having their own specific characteristics. As these approaches share a similar functional architecture and use the same data plane mechanisms, this memo specifies a DHCPv6 option, whereby a single instance of Customer Premises Equipment (CPE) can interwork with all of the standardized and proposed approaches to providing encapsulated IPv4-in-IPv6 services by providing a prioritization mechanism.', changed pages to 11, changed standardization level to Proposed Standard, changed state to RFC, added RFC published event at 2016-11-15, changed IESG state to RFC Published)
2016-11-15	(System)	RFC published