Er...duh, the DR in a multicast environment. Sorry, brain lock there.
The DR is again an element on a broadcast network. The DR acts as the
"manager" for that broadcast network if and when it is the upstream network
from another router. The downstream router sends its join/leave requests to
the DR, regardless of the multicast group it is joining or leaving. This
streamlines things from the downstream router's perspective, since it only
needs to interact with one other router across this broadcast network. But
the DR may not be the direct path to the source of the multicast stream, so
the DR might have to forward the request to the correct upstream router
across the same network.
I'm getting my info from Maufer's "Deploying IP Multicast in the
Enterprise" - which isn't Cisco-specific. Maybe someone else could post
quotes from the Cisco Press books or CCO about the difference.
BJ
----- Original Message -----
From: Bradley J. Wilson
To: cisco
Sent: Saturday, March 03, 2001 5:07 PM
Subject: Re: Difference between Rendezvous Point ,Designated Router
The rendezvous point is an element in a multicasting environment - can't
recall which protocol off the top of my head, it's probably either PIM-DM
or -SM.
The designated router is an element of OSPF on a broadcast network
(ethernet, token ring, etc.). The other routers on the network form their
adjacencies with the DR, and the DR makes sure that every router on the
broadcast network have the same LSDB.
BJ
----- Original Message -----
From: rtc
To: Cisco ; CISCO GROUPSTUDY
Cc: Cisco ; CISCO GROUPSTUDY
Sent: Saturday, March 03, 2001 4:48 PM
Subject: Difference between Rendezvous Point ,Designated Router
what is the Difference between Rendezvous Point and Designated Router?
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