PCEP Procedures and Protocol Extensions for Using PCE as a Central Controller (PCECC) of LSPs
draft-zhao-pce-pcep-extension-for-pce-controller-06
PCE Working Group Q. Zhao
Internet-Draft Z. Li
Intended status: Standards Track D. Dhody
Expires: April 29, 2018 S. Karunanithi
Huawei Technologies
A. Farrel
Juniper Networks, Inc
C. Zhou
Cisco Systems
October 26, 2017
PCEP Procedures and Protocol Extensions for Using PCE as a Central
Controller (PCECC) of LSPs
draft-zhao-pce-pcep-extension-for-pce-controller-06
Abstract
In certain networks deployment scenarios, service providers would
like to keep all the existing MPLS functionalities in both MPLS and
GMPLS while removing the complexity of existing signaling protocols
such as LDP and RSVP-TE. PCE has been proposed to be used as a
central controller (PCECC) so that LSP can be calculated/setup/
initiated and label forwarding entries are downloaded through a
centralized PCE server to each network devices along the path while
leveraging the existing PCE technologies as much as possible.
This draft specify the procedures and PCEP protocol extensions for
using the PCE as the central controller, where LSPs are
calculated/setup/initiated and label forwarding entries are
downloaded through extending PCEP.
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
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on April 29, 2018.
Zhao, et al. Expires April 29, 2018 [Page 1]
Internet-Draft PCECC October 2017
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Basic PCECC Mode . . . . . . . . . . . . . . . . . . . . . . 4
4. PCEP Requirements . . . . . . . . . . . . . . . . . . . . . . 5
5. Procedures for Using the PCE as the Central Controller
(PCECC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.1. Stateful PCE Model . . . . . . . . . . . . . . . . . . . 5
5.2. New LSP Functions . . . . . . . . . . . . . . . . . . . . 5
5.3. PCECC Capability Advertisement . . . . . . . . . . . . . 7
5.4. LSP Operations . . . . . . . . . . . . . . . . . . . . . 7
5.4.1. Basic PCECC LSP Setup . . . . . . . . . . . . . . . . 7
5.4.2. Label Operations . . . . . . . . . . . . . . . . . . 9
5.4.2.1. Label Download . . . . . . . . . . . . . . . . . 9
5.4.2.2. Label Cleanup . . . . . . . . . . . . . . . . . . 9
5.4.3. PCE Initiated PCECC LSP . . . . . . . . . . . . . . . 10
5.4.4. PCECC LSP Update . . . . . . . . . . . . . . . . . . 11
5.4.5. Session Termination . . . . . . . . . . . . . . . . . 12
5.4.6. LABEL-DB Synchronization . . . . . . . . . . . . . . 13
5.4.6.1. LABEL-DB Synchronization procedure . . . . . . . 13
5.4.7. PCECC LSP State Report . . . . . . . . . . . . . . . 16
6. PCEP messages . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1. Label Operations . . . . . . . . . . . . . . . . . . . . 16
6.1.1. The PCLabelUpd message . . . . . . . . . . . . . . . 16
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