From: Michael Jones (majonestx@gmail.com)
Date: Fri Aug 15 2008 - 17:59:52 ART
Experts I can not wrap my brain around this, please help!
Scenario: I'm running all sparse mode interfaces, the workbook is asking for
R2(below) to be Auto RP/ C-RP and MA.
The announce command takes care of the C-RP
The discovery command takes care of MA
The static RP command takes care of the auto rp- because its tied to the
access lits. The access lists says only permit 150.1.2.2 to be the auto rp
for the mentioned groups.
What I do understand is that the candidate RP will talk on the
224.0.1.39address while the Mapping agent listens exclusively for any
Candidates
talking on that address. The Mapping agent then turns around and speaks on
the 224.0.1.40 for the "client routers"and tells them who the RP is. What I
don't understand is, why do you need the access lists ?? If 150.1.2.2 is
the only speaking candidate in the network, shouldn't this become the RP by
default for all multicast groups ? Also is this really auto RP ? Because
without the Auto rp listener command or sparse dense mode on the interface
how is that 224.0.1.39/40 even getting pushed out since they're no
sparse-dense/dense mode interfaces ???
ip pim rp-address 150.1.2.2 1
ip pim send-rp-announce 150.1.2.2 scope 16
ip pim send-rp-discovery Loopback0 scope 16
!
access-list 1 permit 224.0.1.39
access-list 1 permit 224.0.1.40
Thanks in advance for getting me straightened out!
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