PCEP Extension for Flow Specification
draft-ietf-pce-pcep-flowspec-05
Network Working Group D. Dhody
Internet-Draft Huawei Technologies
Intended status: Standards Track A. Farrel
Expires: February 16, 2020 Old Dog Consulting
Z. Li
Huawei Technologies
August 15, 2019
PCEP Extension for Flow Specification
draft-ietf-pce-pcep-flowspec-05
Abstract
The Path Computation Element (PCE) is a functional component capable
of selecting the paths through a traffic engineered network. These
paths may be supplied in response to requests for computation, or may
be unsolicited instructions issued by the PCE to network elements.
Both approaches use the PCE Communication Protocol (PCEP) to convey
the details of the computed path.
Traffic flows may be categorized and described using "Flow
Specifications". RFC 5575 defines the Flow Specification and
describes how Flow Specification Components are used to describe
traffic flows. RFC 5575 also defines how Flow Specifications may be
distributed in BGP to allow specific traffic flows to be associated
with routes.
This document specifies a set of extensions to PCEP to support
dissemination of Flow Specifications. This allows a PCE to indicate
what traffic should be placed on each path that it is aware of.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on February 16, 2020.
Dhody, et al. Expires February 16, 2020 [Page 1]
Internet-Draft PCEP-FlowSpec August 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Procedures for PCE Use of Flow Specifications . . . . . . . . 5
3.1. Context for PCE Use of Flow Specifications . . . . . . . 5
3.2. Elements of Procedure . . . . . . . . . . . . . . . . . . 6
3.2.1. Capability Advertisement . . . . . . . . . . . . . . 6
3.2.2. Dissemination Procedures . . . . . . . . . . . . . . 7
3.2.3. Flow Specification Synchronization . . . . . . . . . 8
4. PCE FlowSpec Capability TLV . . . . . . . . . . . . . . . . . 9
5. PCEP FLOWSPEC Object . . . . . . . . . . . . . . . . . . . . 9
6. Flow Filter TLV . . . . . . . . . . . . . . . . . . . . . . . 11
7. Flow Specification TLVs . . . . . . . . . . . . . . . . . . . 11
8. Detailed Procedures . . . . . . . . . . . . . . . . . . . . . 15
8.1. Default Behavior and Backward Compatibility . . . . . . . 15
8.2. Composite Flow Specifications . . . . . . . . . . . . . . 15
8.3. Modifying Flow Specifications . . . . . . . . . . . . . . 16
8.4. Multiple Flow Specifications . . . . . . . . . . . . . . 16
8.5. Adding and Removing Flow Specifications . . . . . . . . . 16
8.6. VPN Identifiers . . . . . . . . . . . . . . . . . . . . . 17
8.7. Priorities and Overlapping Flow Specifications . . . . . 17
9. PCEP Messages . . . . . . . . . . . . . . . . . . . . . . . . 18
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 21
10.1. PCEP Objects . . . . . . . . . . . . . . . . . . . . . . 21
10.1.1. PCEP FLOWSPEC Object Flag Field . . . . . . . . . . 21
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