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 The configuration that meets the requirements for a media server to distribute streaming videos only to requesting clients, without propagating the video feed through shared trees if there are no requests, and supporting automatic discovery and announcement of RP-set information, is Option C. This option likely includes the use of Protocol Independent Multicast (PIM) in sparse mode, which is suitable for environments where multiple routers need to dynamically discover the Rendezvous Point (RP) for multicast groups. The configuration would also involve commands to enable Auto-RP for the automatic announcement and discovery of RPs.

References: The explanation is based on the principles of multicast routing and PIM operation as described in Cisco Data Center Core Technologies documentation. For more detailed information, the “Implementing and Operating Cisco Data Center Core Technologies (DCCOR v1.2)” course material and the Cisco official documentation on multicast routing would be the appropriate references.

Bidirectional PIM is designed for scenarios where there are many sources and receivers that need to communicate with each other, such as in videoconferencing. Unlike traditional PIM sparse mode, which creates both (,G) and (S,G) entries, Bidirectional PIM only allows the (*,G) entry for the shared tree and does not build an (S,G) entry. This approach reduces the number of mroute state entries, conserving resources. Traffic can flow up and down the shared tree in Bidirectional PIM, and there is no RPF check; instead, a Designated Forwarder (DF) is used to prevent loops. References := Multicast Bidirectional PIM - NetworkLessons.com

 In a vPC (Virtual Port Channel) data center interconnect, both vPC peer devices must have the same system MAC address to ensure that remote switches perceive them as a single logical switch. Since the system MAC value on SW1 is 00:23:04:ee:be:20, the same value must be configured on SW3 to maintain consistency in the vPC domain and ensure seamless communication between the two data center fabrics connected through this vPC interconnect.

References: = The explanation can be inferred from Cisco’s official documentation and resources related to configuring and managing vPCs, ensuring that both peer devices in a vPC domain are configured with identical parameters, including the system MAC address.

 ARP suppression is a feature used in VXLAN/EVPN environments to optimize ARP responses and reduce unnecessary ARP broadcasts across the fabric. When ARP suppression is enabled, the local VTEP (VXLAN Tunnel Endpoint) can respond to ARP requests for known IP-to-MAC address bindings, which are learned via the BGP EVPN control plane. This prevents the need for ARP broadcasts to be sent across the entire VXLAN fabric, thus optimizing the ARP response mechanism and reducing broadcast traffic1.

References:

• Cisco Programmable Fabric with VXLAN BGP EVPN Configuration Guide2.
• Community discussions on ARP suppression in VXLAN/EVPN