Multicast Support for 4 rd Behcet Sarikayasarikayaieee org
Multicast Support for 4 rd Behcet Sarikaya(sarikaya@ieee. org) IETF 85 draft-sarikaya-softwire-4 rdmulticast-04 1
4 rd Multicast Motivation l 4 rd IPv 6 transition technologies are unicast l Multicast support approaches for 4 rd are needed mainly for MAP-E but also MAP-T & 4 rd to enable IPv 4 host to have multicast communication over IPv 6 network l draft-sarikaya-softwire-4 rdmulticast-04 defines encapsulation for MAP-E and translation for MAP-T & 4 rd based multicast support l 2
MAP-T & 4 rd Multicast l IPv 4 Multicast Source Use RFC 2473 for tunneling IPv 4 multicast user 4 rd CE IPv 6 IGMP Proxy IPv 6 packet Payload: IGMP IPv 6 Network l 4 rd BR IPv 4 Network ne 4 -in-6 tun IGMP Group Management Router PIM Messages in IGMP Multicast Data IPv 6 packet Payload: IPv 4 multicast data 3
Translation Multicast l On IPv 6 network, may use native multicast with MLD IPv 4 Multicast Source IPv 4 multicast user 4 rd CE IPv 6 Network 4 rd BR IPv 4 Network MLD Querier on WAN side MLD to IGMP translator IPv 6 Group Management Messages in MLD IPv 4 Network side IGMP/PIM Router Multicast Data in IPv 6 Multicast user: IGMP join CE: MLD join Multicast source: IPv 4 multicast data BR: IPv 6 multicast data 4
Discussion q MAP-E multicast is based on RFC 2473 encapsulation q. Use Multiple BRs but for different groups, same group use always the same BR q. This provides more scalable solutions q. Eases the avalanche problem q 5
Next Steps l Propose to add this draft to 4 rd set of WG drafts to complete the picture 6
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