RFC 8638

IPv4 Multicast over an IPv6 Multicast in Softwire Mesh Networks, September 2019

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M. Xu
Y. Cui
J. Wu
S. Yang
C. Metz
softwire (int)

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DOI:  https://doi.org/10.17487/RFC8638

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During the transition to IPv6, there are scenarios where a backbone network internally running one IP address family (referred to as the internal IP or I-IP family) connects client networks running another IP address family (referred to as the external IP or E-IP family). In such cases, the I-IP backbone needs to offer both unicast and multicast transit services to the client E-IP networks.

This document describes a mechanism for supporting multicast across backbone networks where the I-IP and E-IP protocol families differ. The document focuses on the IPv4-over-IPv6 scenario, due to lack of real-world use cases for the IPv6-over-IPv4 scenario.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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