RTC,
I'm studying for my BCMSN right now (test Monday). Coming from an ISP
background (high end routers), I'm not used to this "Campus Network" type
stuff. I'm reading Karen Webb's Cisco Press book. She mentions DRs in the
Multicast section. She states that DRs are elected on Multi-access Segments
for both PIM-SM and PIM-DM configurations. She doesn't explain it real
deeply (not like you see explanations for the DR/BDR setup of OSPF). But she
does say that the routers that are PIM enabled elect the router with the
Highest IP address as the DR for the network. In this scenario the DR is
responsible for sending out the IGMP query messages. And similar to OSPF,
you don't need a DR on point-to-point links.
The Rendezvous Point is needed when you configure a router with PIM
sparse-mode. Unlike the DR that's used regardless of PIM-SM or PIM-DM.
I'm starting to get the feeling that the Rendezvous Point is more important
when the hosts that are part of the multicast group are widely spread out
through the network.
I'd really like to hear from someone experienced with Multicast, my exposure
to it is all book-based. This will be the weakest part of my CCNP.
Chris
-----Original Message-----
From: rtc [mailto:[EMAIL PROTECTED]]
Sent: Saturday, March 03, 2001 4:48 PM
To: Cisco; CISCO GROUPSTUDY
Cc: Cisco; CISCO GROUPSTUDY
Subject: Difference between Rendezvous Point ,Designated Router
what is the Difference between Rendezvous Point and Designated Router?
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