Multicast

This page cover multicast topics like PIM Sparse Mode and IGMP.

Destination Multicast MAC Address Calculation

This shows how the destination multicast MAC address is calculated from the destination multicast IPv4 address. It also breaks down how and why there is an overlap of multiple Class D multicast addresses to a single destination MAC.

Embedded RP in IPv6 Multicast

Shows the breakdown of the calculation used to determine the RP address when Embedded RP addressing is used in IPv6 Multicast.

IGMPv2 Queries, Reports and Timers

Shows the basics of who sends what queries/reports to who and how often they are sent.

PIM Sparse-Mode

An exploration of how PIM-Sparse mode working, including RP elections with Bootstrap and Auto-RP protocols. This document has an accompanying lab that can be downloaded here.