From: Jeff Mullan (jmullan78@gmail.com)
Date: Tue Mar 20 2007 - 04:25:30 ART
Looks like this message never made it to the group study .
On 3/17/07, Jeff Mullan <jmullan78@gmail.com> wrote:
>
> Folks, Doing one of the work books and had the following question on igmp
> helper address:
>
> The task has the following situation at hand :
>
> R1--R2--R3
>
> Initially, R1 & R2 are PIM neighbours; R2 & R3 are PIM Neigbours. Then the
> task requires on R2 to filter filter R1 as the PIM neighbour. but host
> attached to R1 should still be able to recieve multicast traffic ( although
> R1 is not a PIM neighbour to R2 any more). For this the solution has igmp
> helper address command on R1 pointing to R2s interface. My question is, even
> if we have igmp helper address command on R1, when a join comes in and there
> is no PIM neighbour relationship to R2, how will we extend the multicast
> tree down from R2 to R1 considering source is hanging off of R3 ?
>
> Thanks,
> -JM
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