%% You should probably cite draft-ietf-bier-problem-statement instead of this I-D. @techreport{shepherd-bier-problem-statement-02, number = {draft-shepherd-bier-problem-statement-02}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-shepherd-bier-problem-statement/02/}, author = {Greg Shepherd and Andrew Dolganow and Arkadiy Gulko}, title = {{Bit Indexed Explicit Replication (BIER) Problem Statement}}, pagetotal = 13, year = 2015, month = feb, day = 6, abstract = {There is a need to simplify network operations for multicast services. Current solutions require a tree-building control plane to build and maintain end-to-end tree state per flow, impacting router state capacity and network convergence times. Multi-point tree building protocols are often considered complex to deploy and debug and may include mechanics from legacy use-cases and/or assumptions which no longer apply to the current use-cases. When multicast services are transiting a provider network through an overlay, the core network has a choice to either aggregate customer state into a minimum set of core states resulting in flooding traffic to unwanted network end-points, or to map per-customer, per-flow tree state directly into the provider core state amplifying the network-wide state problem.}, }