Path Computation Element (PCE) based Traffic Engineering (TE) in Native IP Networks
draft-ietf-teas-pce-native-ip-16
TEAS Working Group A. Wang
Internet-Draft China Telecom
Intended status: Informational B. Khasanov
Expires: July 26, 2021 Yandex LLC
Q. Zhao
Etheric Networks
H. Chen
Futurewei
January 22, 2021
Path Computation Element (PCE) based Traffic Engineering (TE) in Native
IP Networks
draft-ietf-teas-pce-native-ip-16
Abstract
This document defines an architecture for providing traffic
engineering in a native IP network using multiple BGP sessions and a
Path Computation Element (PCE)-based central control mechanism. It
defines the Central Control Dynamic Routing (CCDR) procedures and
identifies needed extensions for the Path Computation Element
Communication Protocol (PCEP).
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. CCDR Architecture in Simple Topology . . . . . . . . . . . . 4
4. CCDR Architecture in Large Scale Topology . . . . . . . . . . 5
5. CCDR Multiple BGP Sessions Strategy . . . . . . . . . . . . . 6
6. PCEP Extension for Critical Parameters Delivery . . . . . . . 8
7. Deployment Consideration . . . . . . . . . . . . . . . . . . 9
7.1. Scalability . . . . . . . . . . . . . . . . . . . . . . . 9
7.2. High Availability . . . . . . . . . . . . . . . . . . . . 10
7.3. Incremental deployment . . . . . . . . . . . . . . . . . 10
7.4. Loop Avoidance . . . . . . . . . . . . . . . . . . . . . 10
8. Security Considerations . . . . . . . . . . . . . . . . . . . 10
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
10. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 11
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
11.1. Normative References . . . . . . . . . . . . . . . . . . 11
11.2. Informative References . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
[RFC8283], based on an extension of the Path Computation Element
(PCE) architecture described in [RFC4655] , introduced a broader use
applicability for a PCE as a central controller. PCEP Protocol
(PCEP) continues to be used as the protocol between PCE and Path
Computation Client (PCC). Building on that work, this document
describes a solution using a PCE for centralized control in a native
IP network to provide End-to-End (E2E) performance assurance and QoS
for traffic. The solution combines the use of distributed routing
protocols and a centralized controller, referred to as Centralized
Control Dynamic Routing (CCDR).
[RFC8735] describes the scenarios and simulation results for traffic
engineering in a native IP network based on use of a CCDR
architecture. Per [RFC8735], the architecture for traffic
engineering in a native IP network should meet the following
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