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Why Do We Need BIERv6?
Bit Index Explicit Replication IPv6 encapsulation (BIERv6) is a new multicast technology. With BIERv6, the ingress encapsulates into packet headers a set of nodes to which multicast packets are destined as a BitString before sending the packets to transit nodes. In this way, the transit nodes do not need to establish an MDT for each multicast flow, nor do they need to maintain per-flow states. Instead, the transit nodes replicate and forward packets based on the BitString. Combining Bit Index Explicit Replication (BIER) with native IPv6 packet forwarding, BIERv6 can efficiently carry multicast services such as IPTV, video conferencing, remote education, telemedicine, and online live telecasting.
