Protection Methods for BIER-TE
draft-eckert-bier-te-frr-02
| Document | Type | Expired Internet-Draft (individual) | |
|---|---|---|---|
| Authors | Toerless Eckert , Gregory Cauchie , Wolfgang Braun , Michael Menth | ||
| Last updated | 2018-01-01 (Latest revision 2017-06-30) | ||
| Stream | (None) | ||
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| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
https://www.ietf.org/archive/id/draft-eckert-bier-te-frr-02.txt
Abstract
This document proposes protection methods for the BIER-TE architecture [I-D.eckert-bier-te-arch]. These include 1+1 (live- live) path/tree [RFC7431] redundancy, 1:1 path/tree protection, as well as fast reroute (FRR) methods. The latter may protect against link and/or node failures and leverage infrastructure tunnels, BIER- in-BIER encapsulation, or header modification for implementation. In particular, this memo describes FRR for BIER-TE in detail. FRR for BIER-TE requires support from the BIER-TE controller and the BFRs that are attached to a link/adjacency for which FRR protection is desired. FRR relies on the BIER header described in [I-D.ietf-bier-architecture] which is also used by BIER-TE. It does not require extensions or modifications to existing BIER-TE tables. However, the presented FRR procedures need some additional forwarding plane logic on the BFR. An additional table is needed that carries information about pre-computed backup paths. When a failure is detected, the information from this table is used to modify the bitstring in the BIER header before forwarding a packet over a backup path. To prevent undesired packet duplication, packets should be tunneled on the backup paths.
Authors
Toerless Eckert
Gregory Cauchie
Wolfgang Braun
Michael Menth
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)