Re: "ip multicast boundary" v "ip igmp access-group"

From: Sadiq Yakasai (sadiqtanko@gmail.com)
Date: Tue Feb 26 2008 - 14:29:24 ARST

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Shiran,

When a router receives an IGMP join from interface, this triggers that
router to send a PIM join out another interface upstream towards an RP
in a sparse mode (if this is the first IGMP membership for that MCAST
group in question).

By preventing IGMP membership for a particular group coming into an
interface, you are in essence preventing this router to send out a PIM
join upstream!

Sadiq

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