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Bit Indexed Explicit Replication (BIER) Problem Statement

Document Type Expired Internet-Draft (bier WG)
Expired & archived
Authors Greg Shepherd , Andrew Dolganow , Arkadiy Gulko
Last updated 2016-10-05 (Latest revision 2016-04-03)
Replaces draft-shepherd-bier-problem-statement
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


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.


Greg Shepherd
Andrew Dolganow
Arkadiy Gulko

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)