Layer-2 Multicast

This course is designed as a foundational starting point for learners who want to begin understanding IP Multicast technology. It is ideal for those who are new to multicast and want a clear explanation of how multicast works, where it is used, and how it differs from other packet delivery methods in modern networks. The course begins with an overview of the differences between unicast, broadcast, and multicast traffic distribution. You will learn how multicast allows data, voice, or video traffic to be efficiently delivered to multiple receivers without sending separate copies of the same traffic to each destination. The training also explains common use cases where multicast is valuable, such as streaming media, real-time applications, financial data feeds, and large-scale network services. As you progress, you will learn how to identify both IPv4 and IPv6 multicast addresses and understand how these addresses are mapped to Layer 2 destination MAC addresses. This helps learners connect multicast addressing concepts across different layers of the network. The course also covers key multicast control protocols, including IPv4 IGMP and IPv6 MLDP. You will explore the purpose of IGMP and understand the differences between IGMPv1, IGMPv2, and IGMPv3 through explanations, packet traces, and debug outputs. In addition, the course includes discussions and lab demonstrations on important multicast features such as IGMP Snooping, MLDP Snooping, IGMP Filtering, and PIM Snooping. These topics help learners understand how switches and routers manage multicast traffic efficiently and prevent unnecessary flooding within the network. By the end of this course, learners will have a strong foundation in IP Multicast concepts, addressing, protocol behavior, and practical Layer 2 multicast control mechanisms.