Cisco
300-415 · Question #279
300-415 Question #279: Real Exam Question with Answer & Explanation
The correct answer is B: PIM interfaces. When defining a multicast replicator for an SD-WAN network that has no local multicast sources or receivers, PIM interfaces are irrelevant.
Architecture
Question
Which multicast component is irrelevant when defining a multicast replicator outside the local network without any multicast sources or receivers?
Options
- Aoverlay BFD
- BPIM interfaces
- COMP
- DTLOC
Explanation
When defining a multicast replicator for an SD-WAN network that has no local multicast sources or receivers, PIM interfaces are irrelevant.
Common mistakes.
- A. Overlay BFD (Bidirectional Forwarding Detection) is crucial for monitoring the liveness of tunnel interfaces (TLOCs) in the overlay, which is essential for any traffic, including multicast, to ensure reachability to the replicator.
- C. OMP (Overlay Management Protocol) is the routing protocol of Cisco SD-WAN and is used to advertise and learn the TLOCs and service routes, including information necessary for multicast routing and replicator discovery across the overlay.
- D. TLOC (Transport Location) represents the tunnel endpoints on WAN Edge routers, and a multicast replicator needs to be reachable via a TLOC in the overlay network to receive and forward multicast traffic.
Concept tested. Cisco SD-WAN multicast replicator components
Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-cr-book/multicast.html
Topics
#Multicast#SD-WAN Overlay#OMP#PIM
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