PCEP Extension for SRv6 Unified SIDs
draft-xiong-pce-segment-routing-ipv6-complement-04
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Quan Xiong
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Shaofu Peng
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2021-02-19
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PCE Q. Xiong
Internet-Draft S. Peng
Intended status: Standards Track ZTE Corporation
Expires: August 23, 2021 February 19, 2021
PCEP Extension for SRv6 Unified SIDs
draft-xiong-pce-segment-routing-ipv6-complement-04
Abstract
This document proposes PCEP extensions for SRv6 Path which applied to
the use of SRv6 Unified SIDs.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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and may be updated, replaced, or obsoleted by other documents at any
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 23, 2021.
Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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described in the Simplified BSD License.
Xiong & Peng Expires August 23, 2021 [Page 1]
Internet-Draft PCEP Extension for SRv6 Unified SIDs February 2021
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 3
2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. Requirements Language . . . . . . . . . . . . . . . . . . 3
3. PCEP Extensions for SRv6 Unified SIDs . . . . . . . . . . . . 3
3.1. The OPEN Object . . . . . . . . . . . . . . . . . . . . . 4
3.2. The LSP Object . . . . . . . . . . . . . . . . . . . . . 5
3.2.1. The UNIFIED-SID-INFO TLV . . . . . . . . . . . . . . 6
3.3. The ERO Object . . . . . . . . . . . . . . . . . . . . . 6
4. Operations . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . . 7
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
7.1. New SR PCE Capability Flag Registry . . . . . . . . . . . 8
7.2. New LSP Flag Registry . . . . . . . . . . . . . . . . . . 8
7.3. Extension for SRv6-ERO Registry . . . . . . . . . . . . . 8
8. Normative References . . . . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
[RFC5440] describes the Path Computation Element Protocol (PCEP)
which is used between a Path Computation Element (PCE) and a Path
Computation Client (PCC) (or other PCE) to enable computation of
Multi-protocol Label Switching (MPLS) for Traffic Engineering Label
Switched Path (TE LSP). PCEP Extensions for the Stateful PCE Model
[RFC8231] describes a set of extensions to PCEP to enable active
control of MPLS-TE and Generalized MPLS (GMPLS) tunnels. [RFC8281]
describes the setup and teardown of PCE-initiated LSPs under the
active stateful PCE model, without the need for local configuration
on the PCC, thus allowing for dynamic centralized control of a
network.
Segment Routing (SR) leverages the source routing paradigm. Segment
Routing can be instantiated on MPLS data plane which is referred to
as SR-MPLS [RFC8660]. SR-MPLS leverages the MPLS label stack to
construct the SR path. PCEP Extensions for Segment Routing [RFC8664]
specifies extensions to the PCEP that allow a stateful PCE to compute
and initiate TE paths in SR networks. Segment Routing can be applied
to the IPv6 architecture which is called SRv6 with the Segment
Routing Header (SRH) [RFC8754]. [I-D.ietf-pce-segment-routing-ipv6]
extends the PCEP to support SRv6.
[I-D.ietf-spring-srv6-network-programming] proposes the SRv6 Network
Programming to specify a packet processing program by encoding a
sequence of instructions in the IPv6 packet header. It defined the
Xiong & Peng Expires August 23, 2021 [Page 2]
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