From: Bob Sinclair (bsin@cox.net)
Date: Sat Oct 23 2004 - 12:11:10 GMT-3
AK,
I think you have it right. NMBA-mode on the hub, multipoint interface will
allow you to send multicast traffic from one spoke to another. It is
required that the hub receives a *,G join from each spoke that needs the
traffic, so make sure the hub is the RP, or that it is on the path between
each spoke and the RP.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "AK Singh" <singh.anand@gmail.com>
To: "Cisco certification" <ccielab@groupstudy.com>
Sent: Saturday, October 23, 2004 10:14 AM
Subject: Multicast over NBMA
> Hello folks,
>
> I know thie topic has been discussed in several ways on this alias. I
> searched but couldn't get a direct answer hence posting on this alias.
> Appreciate any response.
>
> Let us say we are running pim in sparse mode and we have take RP
> issues (i .e spokes are learning correct RPs, the RP is places a
> router which is on top of hub and we are using autorp listener).
>
> Now when to send a feed (ping to the group) from one of the spoke to a
> group on other spoke, do we always need a tunnel to be created between
> spokes for this?
>
> Here is my undestanding (please correct me), we don't need tunnel
> between spokes when we are using either:
>
> 1) pim nbma mode
> 2) spokes have brodcast capability between them.
>
> When else do we need? Any more lights on this topic.
>
> Thanks
> -Anand
>
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