IPv6 Multicast - multiple join on one Multicast address

  Kippix 20:14 20 Jun 2014

hi i have a problem with understanding PIM-SM multicast tree. i just cant figgure why there is a (2001:DB8:1111:1111::1, FF08:1111) tree with shared tree (*,FF08::1111) on R3 router.

i have been spending a lot of time on that problem and just cant figgure that out. one more important thing is that R3 does not process each multicast packet from FF08::1111 twice.

here are pictures with relevant information

Please help

  Kippix 20:23 20 Jun 2014

just to be clear - i understand why is R3 member of shared tree - but i have no idea why is also member of source-specific tree.

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