16.1. Ingress Replication

16.1. Ingress Replication

The PEs may use ingress replication for flooding BUM traffic as described in Section 11 ("Handling of Multi-destination Traffic"). A given broadcast packet must be sent to all the remote PEs. However, a given multicast packet for a multicast flow may be sent to only a subset of the PEs. Specifically, a given multicast flow may be sent to only those PEs that have receivers that are interested in the multicast flow. Determining which of the PEs have receivers for a given multicast flow is done using explicit tracking per [RFC7117].