An Optional Encoding of the BIFT-id Field in the non-MPLS BIER Encapsulation

The information below is for an old version of the document
Document Type Expired Internet-Draft (bier WG)
Authors IJsbrand Wijnands  , Xiaohu Xu  , Hooman Bidgoli 
Last updated 2019-04-21 (latest revision 2018-10-18)
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Expired & archived
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This Internet-Draft is no longer active.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 "multicast domain", without requiring intermediate routers to maintain any per-flow state or to engage in an explicit tree-building protocol. The Multicast packet is encapsulated using a BIER Header and transported through an MPLS or non-MPLS network. When MPLS is used as the transport, the Bit Indexed Forwarding Table (BIFT) is identified by a MPLS Label. When non-MPLS transport is used, the BIFT is identified by a 20bit value. This document describes one way of encoding the 20bit value.


IJsbrand Wijnands (
Xiaohu Xu (
Hooman Bidgoli (

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