Understanding PIM and Static RPs

Protocol Independent Multicast (PIM) sparse mode is the most common multicast protocol used on the Internet. PIM sparse mode is the default mode whenever PIM is configured on any interface of the device. However, because PIM must not be configured on the network management interface, you must disable it on that interface.

Each any-source multicast (ASM) group has a shared tree through which receivers learn about new multicast sources and new receivers learn about all multicast sources. The rendezvous point (RP) router is the root of this shared tree and receives the multicast traffic from the source. To receive multicast traffic from the groups served by the RP, the device must determine the IP address of the RP for the source.

One common way for the device to locate RPs is by static configuration of the IP address of the RP. For information about alternate methods of locating RPs, see the Junos Multicast Protocols Configuration Guide.

Related Topics

• Junos OS Feature Support Reference for SRX Series and J Series Devices
• Multicast Overview
• Example: Configuring PIM Sparse Mode and RP Static IP Addresses (CLI)
• Protocol Independent Multicast Overview in the Junos Multicast Protocols Configuration Guide
• PIM Sparse Mode in the Junos Multicast Protocols Configuration Guide