From: Cristian Henry H (chenry@reuna.cl)
Date: Mon Dec 09 2002 - 08:32:03 GMT-3
This scene is supported with ip pim sparse-dense mode, actually the
rason for using sparse-dense mode is when your routers aren't be in the
same segment with the RP-agent . Try configuring ip pim sparse-dende
mode!
Surendran wrote:
>
> Hi Group,
> I have some question on Multicast over NBMA. I read from Cisco
> documentation that NBMA mode is to be used in a frame relay cloud and ip
> sparse mode should be used with this. However, I also understand
> Auto-RP, requires dense mode to broadcast its RP group advertisements.
> For example below,
>
>
> R1------R2-------FR--------R3
> \
> \___ R4
>
> R1 and R2 are connected to each other with ethernet cable. R2 is the
> central hub and R3 & R4 are spokes in the frame-relay cloud. Lets say, I
> am using R1 as my Candidate-RP and Mapping Agent. According to Cisco
> documentation I must run ip pim nbma-mode & ip pim sparse mode. R1 will
> be sending out RP information to all the routers. However, in a sparse
> mode environment the routers R3 & R4 must join the group 224.0.1.40 to
> receive this information in the first place. Theoretically, should not
> work....how then does it work?
>
> Any idea?
>
> Suren
> .
-- Cristian E. Henry REUNAE-mail: chenry@reuna.cl Fono: 56-2-3370336 .
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