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Cisco support for SSM signaling

I have a few questions about SSM signaling:

  1. Can the PIM to IGMP proxy support converting a PIM message with (S,G) information to a IGMPv3 message?
  2. Can two static sources be mapped to a single multicast group using SSM-Mapping?
  3. Can IGMP Helper support IGMPv3?

I’ve done some preliminary testing for the first two, on a Cisco 3560 with IOS 12.2(50)SE4. I can only get the igmp proxy to translate into an IGMPv2 message and for SSM-Mapping the first static source configured is the only one used to create an mroute entry. Additionally does it make a difference if I am testing this on a layer 3 switch vs. a router?

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