Tree Engineering for Bit Index Explicit Replication (BIER-TE)

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Publisher: IETF
Doc Type: Standard
Pages: 43
Abstract: This memo describes per-packet stateless strict and loose path steered replication and forwarding for "Bit Index Explicit Replication" (BIER) packets (RFC 8279); it is called "Tree Engineering for Bit Index Explicit Replication" (BIER-TE) and is intended to be used as the path steering mechanism for Traffic Engineering with BIER. BIER-TE introduces a new semantic for "bit positions" (BPs). These BPs indicate adjacencies of the network topology, as opposed to (non-TE) BIER in which BPs indicate "Bit-Forwarding Egress Routers" (BFERs). A BIER-TE "packets BitString" therefore indicates the edges of the (loop-free) tree across which the packets are forwarded by BIER-TE. BIER-TE can leverage BIER forwarding engines with little changes. Co-existence of BIER and BIER-TE forwarding in the same domain is possible -- for example, by using separate BIER "subdomains" (SDs). Except for the optional routed adjacencies, BIER-TE does not require a BIER routing underlay and can therefore operate without depending on a routing protocol such as the "Interior Gateway Protocol" (IGP).
Publication Date: 2022-10-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9262
Link: https://doi.org/10.17487/RFC9262
Author(s): Toerless Eckert
Michael Menth
Gregory Cauchie
Keyword(s): BIER, Controller, ECMP, Forwarding, Traffic Engineering, Multicast, Traffic Steering

Latest version of IETF RFC 9262

Document Versions — IETF RFC 9262

▶ IETF RFC 9262 (2022-10-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 8174 [Active*]
IETF RFC 8279 [Active*]
IETF RFC 8296 [Active*]

Bibliographic Reference(s)

10.1109-ICC.2016.7511036 — ICC EXTERNAL
10.1145-362686.362692 — Bloom70 EXTERNAL
10.3233-JHS-1994-3405 — RCSD94 EXTERNAL
IETF.draft-eckert-bier-te-frr-03 — BIER-TE-PROTECTION EXTERNAL
IETF.draft-ietf-bier-multicast-http-response-06 — BIER-MCAST-OVERLAY EXTERNAL
IETF.draft-ietf-bier-non-mpls-bift-encoding-04 — NON-MPLS-BIER-ENCODING EXTERNAL
IETF.draft-ietf-bier-te-yang-05 — BIER-TE-YANG EXTERNAL
IETF.draft-ietf-roll-ccast-01 — I-D.ietf-roll-ccast EXTERNAL
IETF.draft-ietf-teas-rfc3272bis-21 — TE-OVERVIEW EXTERNAL
IETF RFC 4253 [Active*]
IETF RFC 4456 [Active*]
IETF RFC 4655 [Active*]
IETF RFC 5440 [Active*]
IETF RFC 6241 [Active*]
IETF RFC 6242 [Active*]
IETF RFC 7589 [Active*]
IETF RFC 7752 [Superseded*]
IETF RFC 7950 [Active, Amended*]
IETF RFC 7988 [Active*]
IETF RFC 8040 [Active*]
IETF RFC 8253 [Active*]
IETF RFC 8345 [Active*]
RFC8401 — RFC8401 EXTERNAL
IETF RFC 8402 [Active*]
RFC8444 — RFC8444 EXTERNAL
IETF RFC 8556 [Active*]

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Referenced By

IETF RFC 9522 [Active*]