Junos OS Multicast Standards

The Junos OS implements the following protocols to support IP multicast routing:

• Internet Group Management Protocol (IGMP), versions 1 and 2—Used to learn whether group members are present, for IP version 4 (IPv4) routers.
• Multicast Listener Discovery (MLD), versions 1 and 2—Used to learn whether group members are present, for IP version 6 (IPv6) routers.
• Distance Vector Multicast Routing Protocol (DVMRP)—Dense-mode multicast routing protocol.
• Protocol Independent Multicast (PIM)—Multicast routing protocol that routes to multicast groups that might span wide-area and interdomain internetworks. Both dense mode and sparse mode are supported.
• Multicast Source Discovery Protocol (MSDP)—Multicast routing protocol that discovers active sources of multicast messages. PIM sparse mode uses these sources.
• Session Announcement Protocol (SAP) and Session Description Protocol (SDP)—Handle conference session announcements.