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Multicast Support for Dual Stack Lite and 6RD

Multicast Support for Dual Stack Lite and 6RD. Behcet Sarikaya. draft-sarikaya-softwire-dslite6rdmulticast-00.txt. DS- Lite Multicast. IPv6. IPv4. IPv6 Internet. DS- Lite B4 MUST support IGMP Proxy DS- Lite AFTR MUST support IGMP Querier ASM/SSM transparently supported.

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Multicast Support for Dual Stack Lite and 6RD

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  1. Multicast Support for Dual Stack Lite and 6RD Behcet Sarikaya • draft-sarikaya-softwire-dslite6rdmulticast-00.txt

  2. DS-Lite Multicast IPv6 IPv4 IPv6 Internet • DS-Lite B4 MUST support IGMP Proxy • DS-Lite AFTR MUST support IGMP Querier • ASM/SSM transparently supported Private IPv4 Address IPv6 Network AFTR - CGN IPv4 4-in-6 tunnel IPv4 Internet Home Network NAT44 (Private->Public) B4 - CPE (dual-stack) IPv6 IGMP Proxy IGMP Querier

  3. DS-Lite Multicast Operation • B4 establishes a tunnel interface with AFTR • IGMP messages and v4 multicast data are carried in v4 in v6 tunnel between B4 and AFTR • B4 sends aggregated IGMP report messages to AFTR • B4 receives v4 multicast data, decapsulates it and then delivers it to the hosts • Due to the shared link no duplication is needed • AFTR acts as the default multicast querier for all B4s • AFTR receives v4 multicast data, first replicates and then forwards in IPv4-in-IPv6 tunnel to B4s • PROS: Encapsulation based no translation • PROS: Does not require native multicast in access

  4. 6rd Multicast • 6rd CPE MUST support MLD Proxy • 6rd BR MUST support MLD Querier • ASM/SSM transparently supported 6rd BR IPv4 IPv4 Network IPv6 Network CPE 6-in-4 tunnel IPv6 MLD Proxy MLD Querier

  5. 6rd Multicast Operation • 6rd customer edge device (CPE) is MLD Proxy • 6rd CPE establishes tunnel interface with 6rd BR • MLD messages and v6 multicast data are carried in v6 in v4 tunnel between CPE and BR • The protocol is analogous to DS-Lite multicast but instead of IGMP, MLD is supported • PROS: Encapsulation based no translation • PROS: Does not require native multicast in access

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