Multicast Support for Dual Stack Lite

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Last updated 2012-12-23 (latest revision 2012-06-21)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo specifies modifications required to Dual-Stack Lite (DS- Lite) so that both IPv4 hosts can receive multicast data from IPv4 servers. The DS-Lite solution is based on DS-Lite Basic Bridging BroadBand element (B4) proxying Internet Group Management Protocol (IGMP) and then tunneling IGMP messages over IPv4-in-IPv6 softwire to DS-Lite Address Family Transition Router element (AFTR). IPv4 multicast data received at AFTR is tunneled over IPv4-in-IPv6 softwire to B4 and then delivered to the hosts. This solution integrates well with DS- Lite unicast solution by using IPv4-in-IPv6 softwire and works with unicast IPv6 network connecting B4 with AFTR.


Behcet Sarikaya (

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