Which of the following configuration steps are mandatory for IPv4 PIM ASM to work? (Choose two)

For IPv4 PIM Any-Source Multicast (ASM) to function, two core components are mandatory. First, PIM must be enabled on the network interfaces that will participate in the multicast domain. This includes interfaces facing the multicast source (to receive the initial traffic) and core interfaces that form the path toward the Rendezvous Point (RP) and receivers. Second, all PIM routers must know the address of the RP, which acts as the central meeting point for sources and receivers. This is accomplished by either statically configuring the RP address on each router or using a dynamic discovery mechanism like the Bootstrap Router (BSR) protocol.

B. Configure PIM on access facing interfaces: While needed for end-to-end delivery, the core PIM domain and source registration can be established without PIM on receiver-facing interfaces.
D. Create and apply register and join policies: Policies are optional controls for filtering sources or groups. PIM ASM functions without any explicitly defined policies, using default-allow behavior.
E. Define the rpf-table: The Reverse Path Forwarding (RPF) check uses the main unicast routing table by default. Defining a specific rpf-table is an optional, advanced feature.

1. Nokia 7750 SR OS Multicast Protocols Guide, Release 22.10.R1, Page 61, "PIM Configuration Process": This section states, "The minimal PIM configuration must include enabling PIM on the router and on PIM interfaces, and configuring a rendezvous point (RP)." This directly supports that enabling PIM on interfaces (A) and configuring an RP (C) are the mandatory steps.

2. Nokia 7750 SR OS Multicast Protocols Guide, Release 22.10.R1, Page 81, "Rendezvous Point": The documentation emphasizes the necessity of the RP, stating, "For PIM-SM to function, every PIM-SM router must be able to map a multicast group address to the same RP address." This confirms that configuring the RP (C) is a mandatory requirement.

3. Nokia 7750 SR OS Multicast Protocols Guide, Release 22.10.R1, Page 64, "Configuring PIM Interfaces": This section details the requirement to enable PIM on interfaces to establish adjacencies and forward multicast traffic, which is the action described in option A.