https://songkou.github.io/tags/msdp/Recent content in MSDP on Council of ElrondHugoenMon, 20 Nov 2023 12:00:00 +0800https://songkou.github.io/posts/pim-sparse-mode-detailed/Mon, 20 Nov 2023 12:00:00 +0800https://songkou.github.io/posts/pim-sparse-mode-detailed/<p>A step-by-step walk through the PIM Sparse Mode (PIM-SM) control plane — from a receiver&rsquo;s IGMP report through shared-tree construction, source registration, the native source tree, and the optional shortest-path-tree switchover — then how to make the Rendezvous Point redundant with Anycast RP. For the Designated Router versus Assert election and multicast-ECMP behavior, see the companion post <a href="https://songkou.github.io/posts/pim-dr-assert-multicast-ecmp/">PIM DR, Assert, and Multicast ECMP</a>.</p> <h2 id="1-overview">1. Overview</h2> <p>Protocol Independent Multicast Sparse Mode (PIM-SM) builds multicast distribution trees only where receivers explicitly request traffic. It is intended for networks where multicast receivers are sparsely distributed.</p>