Valid Ways to Configure Redundant Rendezvous Point for BIDIR Multicast

B.

Multicast is a one-to-many communication method used in networking to send data to multiple recipients. A rendezvous point (RP) is a multicast router that acts as a shared root for a multicast tree, where senders and receivers register themselves with the RP. Bidirectional PIM (BIDIR-PIM) is a multicast routing protocol used to build multicast distribution trees for bidirectional traffic flows.

To configure a redundant rendezvous point for BIDIR multicast, the following methods are available:

A. Phantom RP: This method creates a virtual RP address, and multiple routers can assume the role of the RP for a multicast group. In case of failure, another router takes over the role of RP with the same virtual RP address.

B. Anycast RP: This method involves assigning the same RP address to multiple routers, where each router has a unique IP address. The multicast traffic is sent to the closest RP, based on the routing table.

C. Auto RP: This method uses a designated RP mapping agent (MA) that dynamically learns the RP information and advertises it to the multicast routers. Auto RP simplifies the RP configuration but has limitations, such as scalability issues and security vulnerabilities.

D. MSDP: Multicast Source Discovery Protocol (MSDP) is used to distribute source-active multicast traffic between different multicast domains. MSDP is used in conjunction with another multicast routing protocol, such as PIM-SM or BIDIR-PIM, and does not provide redundancy for the RP.

In summary, A (Phantom RP) and B (Anycast RP) are valid ways to configure a redundant RP for BIDIR multicast, while C (Auto RP) and D (MSDP) are not used for redundancy.