Home » Juniper » JN0-661 » Which purpose does the MSDP session between RP1 and RP2 serve?
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RP1 and RP2 are acting as PIM-SM rendezvous points (Rps) in their autonomous system.
Referring to the diagram, which purpose does the MSDP session between RP1 and RP2 serve?
A. MSDP allows RPs in different PIM domains to advertise any active multicast receivers to each other.
B. MSDP allows RPs in different PIM domains to advertise any active multicast sources to each other.
C. MSDP routes are used by an RP for reverse path forwarding lookups when milticast sources exist in different autonomous systems.
D. MSDP allows RPs in different PIM domains to form PIM neighbor relationship with each other.
Correct Answer: B
Explanation/Reference:
The Multicast Source Discovery Protocol (MSDP) is used to connect multicast routing domains. It typically runs on the same router as the Protocol
Independent Multicast (PIM) sparse-mode rendezvous point (RP). Each MSDP router establishes adjacencies with internal and external MSDP peers similar to the way BGP establishes peers. These peer routers inform each other about active sources within the domain. When they detect active sources, the routers can send PIM sparse-mode explicit join messages to the active source.
References: http://www.juniper.net/techpubs/en_US/junos15.1/topics/concept/multicast-msdp-overview.html
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