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Point-to-Multipoint LSPs Configuration

To set up a point-to-multipoint LSP, you configure the primary LSP from the ingress router and the branch LSPs that carry traffic to the egress routers. The configuration of the primary point-to-multipoint LSP is similar to a signaled LSP. In addition to the conventional LSP configuration, you specify a path name on the primary LSP and this same path name on each branch LSP. By default, the branch LSPs are dynamically signaled by means of CSPF and require no configuration. You can alternatively configure the branch LSPs as a static path.

Because E-series routers can only function as egress routers, you must use M-series routers running JUNOS software as ingress routers to enable point-to-multipoint LSPs to send packets through the network to the endpoints connected to the egress routers.

Observe the following guidelines to deliver multicast data using point-to-multipoint LSPs on the egress E-series routers:

The IP interface on which the packet arrives must be an IGMP-owned interface. An IGMP-owned interface refers to an interface in which IGMP is the only multicast protocol enabled.
The actual route to the source must be through an IGMP-owned interface.

Point-to-Multipoint LSPs Configuration

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