Point-to-multipoint LSPs, 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 at the [edit chassis fpc slot-number pic slot-number port port-number] hierarchy level, the PFE is forced to be a leaf node in the multicast 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 therefore they are less likely to become saturated with traffic.