From: Mohamed Saeed (mohamed_saeed2@rayacorp.com)
Date: Sun Nov 26 2006 - 06:36:14 ART
Hi All,
In that task, we have R1, R4 and R5 in hub and spoke setup with R1 as
the hub. PIM sparse-dense mode is running over the cloud. It is required
that the Ethernet interface of R4 to receive multicast feed from R5
Ethernet and also to make R4 responds to ICMP ping to 224.4.4.4 group.
First, I though there will be an issue with RPF and also I though I
should use the "ip igmp" command to R4 to allow it responding to ICMP
ping. What I found in the solution guide is that the only configuration
done is enabling the "ip pim nbma-mode" command under the hub physical
interface.
As I know, that command is used to send multicast feed ONLY to the DLCIs
that have multicast receivers in sparse mode. I wonder what that command
is supposed do in this setup. Also do not we need to enforce R4 Ethernet
interface to join the 224.4.4.4 group? Hope if someone could help with
that.
Kind Regards
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