Contents AS65001 Physical Topology AS65001 Multicast Topology – Auto RP User 1 Joins 224.1.1.1 Server1 sends Multicast Traffic to 224.1.1.1 Building the Shortest-Path Tree (SPT) Designated Router (DR) Election PIM Assert Mechanism – Forwarder Election AS65002 Physical Topology AS65002 Multicast Topology