All things related to multicast

On Tue, 30 Nov 2004, John Kristoff wrote:

> On Tue, 30 Nov 2004 12:35:26 -0800 (PST)
> 
>  wrote:
> 
> > Setting DR priority will only set which router win's DR election - 
> > overriding the normal IP-based election.
> > 
> > If you want faster DR failover, tweak down the PIM hello timers. 
> > This is what is used for a candidate DR to determine that the elected DR 
> > is either alive or dead.
> 
> OK, thanks.  I guess that will have to do.  I thought that I might
> be able to gracefully migrate the DR to another interface, which would
> magically move PIM state by issuing the associated joins and prunes, but
> I guess that is just asking for too much magic.  :-)

Gracefully? The DR election state-machine will do just that - within 2.5x 
the PIM hello timer interval. When a new DR is elected, it will use the 
magic of IGMP host reports and PIM joins to move the state over. ;)

Greg
 
> John
>