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The ZebOS® ARS includes support for both IPv4 and IPv6 multicast protocol modules. This includes support for Protocol Independent Multicast-Sparse Mode (PIM-SM and PIM-SMv6) and Protocol Independent Multicast-Dense Mode (PIM-DM and PIM-DMv6). ZebOS PIM-SM routes multicast packets to multicast groups and is designed to efficiently establish distribution trees across wide area networks (WANs). PIM-SM is termed “protocol independent” because it can use the route information that any routing protocol enters into the multicast RIB, or, as it is known in Windows terminology, the multicast view. Sparse mode protocol is designed for situations where multicast groups are thinly populated across a large region. Although it can operate in LAN environments, they are most efficient over WAN environments. PIM-DM is a data-driven multicast routing protocol, which builds source-based multicast distribution trees that operate on the flood-and-prune principle. It requires unicast-routing information but does not depend on a specific unicast routing protocol. It is designed to effectively distribute data to target recipients in a concentrated area. Ideally suited for routers and switches, PIM-DM functionality greatly optimizes the delivery of video conferencing, streaming music and movies, Voice over IP (VoIP), distributed downloads, internet TV and more into Local Area Networks. In addition, ZebOS supports the Distance Vector Multicast Routing Protocol (DVMRP) Module. DVMRP is a multicast routing protocol that provides an efficient mechanism for connectionless datagram delivery to a group of hosts across an internetwork. It is a distributed protocol that dynamically generates IP multicast delivery trees using a technique called Reverse Path Multicasting.
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