Multicast Assert Messages in PIM-SM - Designated Forwarder?

From: Roger RPF (rpf@bluemail.ch)
Date: Tue May 20 2008 - 05:44:12 ART


Hi group,

I have a question regarding the assert messages in PIM-SM. I undertand, that
the assert is responsible for the folowing in PIM-DM and PIM-SM:

Used on multiaccess networks to determine which router wins the right to
forward multicast onto the LAN. In other words, this would be the Designated
Forwarder.

Until now I was thinking that the Designated Router is the router which
forwards traffic to the LAN. But as far as I see now, the DR is really only
needed for IGMPv1 to manage the queries.

Is that correct?

So how can I manually select the Designated Forwarder if for example for
administrative purposes I want to select the forwarder towards the LAN?

regards

Roger



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