BIER Ping and Trace

Document Type Expired Internet-Draft (bier WG)
Authors Nagendra Nainar  , Carlos Pignataro  , Nobo Akiya  , Lianshu Zheng  , Mach Chen  , Greg Mirsky 
Last updated 2020-11-16 (latest revision 2020-05-11)
Replaces draft-kumarzheng-bier-ping
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state WG Consensus: Waiting for Write-Up
Other - see Comment Log
Document shepherd Mankamana Mishra
IESG IESG state Expired
Consensus Boilerplate Yes
Telechat date
Responsible AD (None)
Send notices to mankamana mishra <>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Bit Index Explicit Replication (BIER) is an architecture that provides optimal multicast forwarding through a "BIER domain" without requiring intermediate routers to maintain any multicast related per- flow state. BIER also does not require any explicit tree-building protocol for its operation. A multicast data packet enters a BIER domain at a "Bit-Forwarding Ingress Router" (BFIR), and leaves the BIER domain at one or more "Bit-Forwarding Egress Routers" (BFERs). The BFIR router adds a BIER header to the packet. The BIER header contains a bit-string in which each bit represents exactly one BFER to forward the packet to. The set of BFERs to which the multicast packet needs to be forwarded is expressed by setting the bits that correspond to those routers in the BIER header. This document describes the mechanism and basic BIER OAM packet format that can be used to perform failure detection and isolation on BIER data plane.


Nagendra Nainar (
Carlos Pignataro (
Nobo Akiya (
Lianshu Zheng (
Mach Chen (
Greg Mirsky (

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