Hi Susan & Jeffrey,

Now multicast is an important service in the network such as IPTV, etc. But 
there are complex choice for multicast solutions including L2 multicast vs. L3 
multicast, public multicast vs. multicast VPN, multicast based on 
PIM/BGP/mLDP/P2MP TE/IGP/Ingress replication which make the multicast provision 
difficult. This may be simplified through the I2RS intefaces. Could we define 
the multicast usecase in I2RS WG? And how will we define the multicast usecase: 
enhancing the draft-ietf-i2rs-usecase-reqs-summary-00 to incorporate multicast 
use cases or proposing independent multicast use case draft?





Best Regards,

Zhenbin(Robin)


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