From: Bob Sinclair (bob@bobsinclair.net)
Date: Fri Jan 04 2008 - 13:16:15 ARST
Monica Belluci wrote:
> Hi,
>
> If I increase dr-priority of router in Multicasting by using ip pim
> dr-priority command, What action(Job responsibility) will be taken by DR in
> multicasting ?
> If Edge router become DR in Multicast network , Will it effect the flow of
> multicast traffic ?
> Your comments are appereciable for me.
>
Here are some PIM DR facts:
By default, the router with the highest interface IP address on a
subnet will be the PIM Designated Router.
Highest IP on the subnet can be overridden ip pim dr-priority X
(default 1, higher preferred)
In Sparse mode, the DR on the subnet sends *,G join and register
messages.
With equal metrics to the source, the DR will be the forwarder for
the subnet, even if not highest IP.
With equal metrics, the upstream neighbor with the highest IP will be
the rpf neighbor, even if it is not DR.
Hth,
--Bob Sinclair CCIE 10427 CCSI 30427 www.netmasterclass.net
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