US Patent 9832031 Bit index explicit replication forwarding using replication cache

A data packet forwarding method including receiving, by a network node, a data packet that comprises a bit string, a BFIR identifier (ID), and a multicast replication path (MRP) ID, wherein the BFIR ID identifies an ingress network node for a multicast group, and wherein the MRP ID identifies the multicast group, identifying an entry in a BIER Replication Path Cache Table (BRCT) using the BFIR ID and the MRP ID, wherein the entry identifies a replication neighbor (NBR) list associated with the BFIR ID and the MRP ID, and forwarding the data packet in accordance with the replication NBR list.