From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Wed Jul 14 2004 - 14:01:05 GMT-3
I believe you are correct; PIM -SM will have the same prune-override
problem as PIM-DM on a frame hub and spoke topology. PIM-SM has the
optional nbma-mode to take care of this problem. If you enable this on the
the hub it will keep track of each joining router individually and will
prune only the routers from which it recieved the prune. In other words,
PIM-SM has an optional fix that is not available to PIM-DM.
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: <gladston@br.ibm.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, July 14, 2004 11:53 AM
Subject: Prune in Dense Mode Partial Meshed
> I understand the problem that arises when a spoke router sends a Prune
message to the Hub in a partial-meshed FR subnet, causing a second spoke to
lost multicast packets because it did not see the Prune.
>
> I am trying to figure out why it is different with Sparse-mode. As I view
it if R1 (hub) receives a message from R2 (spoke A) to stop sending
multicast out Serial0, R3 (spoke B) will not hear the message either, as it
occurs with Dense-mode.
>
>
> Any Tip?
>
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