PCEP Extensions for BIER-TE
draft-chen-pce-bier-08
Networking Working Group Ran. Chen
Internet-Draft Zheng. Zhang
Intended status: Standards Track ZTE Corporation
Expires: May 28, 2021 Senthil. Dhanaraj
Huawei
Fengwei. Qin
China Mobile
November 24, 2020
PCEP Extensions for BIER-TE
draft-chen-pce-bier-08
Abstract
Bit Index Explicit Replication (BIER)-TE shares architecture and
packet formats with BIER as described in [RFC8279]. BIER-TE forwards
and replicates packets based on a BitString in the packet header, but
every BitPosition of the BitString of a BIER-TE packet indicates one
or more adjacencies as described in [I-D.ietf-bier-te-arch].BIER-TE
Path can be derived from a Path Computation Element (PCE).
This document specifies extensions to the Path Computation Element
Protocol (PCEP) that allow a PCE to compute and initiate the path for
the BIER-TE.
Status of This Memo
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Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Chen, et al. Expires May 28, 2021 [Page 1]
Internet-Draft PCEP Ext for BIER-TE November 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 3
3. Overview of PCEP Operation in BIER Networks . . . . . . . . . 3
4. Object Formats . . . . . . . . . . . . . . . . . . . . . . . 3
4.1. The OPEN Object . . . . . . . . . . . . . . . . . . . . . 3
4.1.1. The BIER-TE PCE Capability sub-TLV . . . . . . . . . 3
4.2. The RP/SRP Object . . . . . . . . . . . . . . . . . . . . 4
4.3. END-POINTS object . . . . . . . . . . . . . . . . . . . . 4
4.4. ERO Object . . . . . . . . . . . . . . . . . . . . . . . 4
4.4.1. BIER-ERO Subobject . . . . . . . . . . . . . . . . . 5
4.4.2. BIER-ERO Processing . . . . . . . . . . . . . . . . . 6
5. Security Considerations . . . . . . . . . . . . . . . . . . . 6
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
6.1. PCEP Objects . . . . . . . . . . . . . . . . . . . . . . 6
6.1.1. BIER-TE-PCE-CAPABILITY Sub-TLV Type Indicators . . . 6
6.1.2. New Path Setup Type . . . . . . . . . . . . . . . . . 7
6.1.3. BIER-ERO Subobject . . . . . . . . . . . . . . . . . 7
6.1.4. PCEP-Error Objects and Types . . . . . . . . . . . . 7
7. Normative references . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
Bit Index Explicit Replication (BIER)-TE shares architecture and
packet formats with BIER as described in [RFC8279]. BIER-TE forwards
and replicates packets based on a BitString in the packet header, but
every BitPosition of the BitString of a BIER-TE packet indicates one
or more adjacencies as described in [I-D.ietf-bier-te-arch].BIER-TE
Path can be derived from a Path Computation Element (PCE).
[RFC8231] specifies a set of extensions to PCEP that allow a PCE to
compute and recommend network paths in compliance with [RFC4657] and
defines objects and TLVs for MPLS-TE LSPs.
This document uses a PCE for computing one or more BIER-TE paths
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