Statement introduced in Junos OS Release 11.3.
For point-to-multipoint LSPs configured on T Series routers, protect the Packet Forwarding Engine (PFE) from bandwidth saturation. When a PFE does not need to replicate traffic, the PFE’s bandwidth is less likely to become saturated. When you include the no-mcast-replication statement, the PFE is forced to be a leaf node in the binary tree. Leaf nodes, unlike branch nodes, do not replicate traffic in the process of forwarding traffic. Because leaf nodes have no children, they do not need to replicate traffic, and thus are less likely to become saturated with traffic.
If you omit the no-mcast-replication statement, the PFE can become a branch node or a leaf node. When the PFE becomes a branch node, the PFE must replicate traffic.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.