Extensions to PCEP for Distributing Label Cross Domains
draft-chen-pce-label-x-domains-11
PCE Working Group H. Chen
Internet-Draft Futurewei
Intended status: Standards Track A. Liu
Expires: January 11, 2021 Ciena
M. Toy
Verizon
V. Liu
July 10, 2020
Extensions to PCEP for Distributing Label Cross Domains
draft-chen-pce-label-x-domains-11
Abstract
This document specifies extensions to PCEP for distributing labels
crossing domains for an inter-domain Point-to-Point (P2P) or Point-
to-Multipoint (P2MP) Traffic Engineering (TE) Label Switched Path
(LSP).
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Conventions Used in This Document . . . . . . . . . . . . . . 3
4. Label Distribution . . . . . . . . . . . . . . . . . . . . . 3
4.1. An Exmaple . . . . . . . . . . . . . . . . . . . . . . . 4
5. Extensions to PCEP . . . . . . . . . . . . . . . . . . . . . 5
5.1. RP Object Extension . . . . . . . . . . . . . . . . . . . 5
5.2. Label Object . . . . . . . . . . . . . . . . . . . . . . 6
5.3. LSP Tunnel Object . . . . . . . . . . . . . . . . . . . . 7
5.4. Request Message Extension . . . . . . . . . . . . . . . . 8
5.5. Reply Message Extension . . . . . . . . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . 9
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
7.1. Request Parameter Bit Flags . . . . . . . . . . . . . . . 9
8. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 10
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.1. Normative References . . . . . . . . . . . . . . . . . . 10
9.2. Informative References . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 11
1. Introduction
After a path crossing multiple domains is computed, an inter-domain
Traffic Engineering (TE) Label Switched Path (LSP) tunnel may be set
up along the path by a number of tunnel central controllers (TCCs).
Each of the domains through which the path goes may be controlled by
a tunnel central controller (TCC), which sets up the segment of the
TE LSP tunnel in the domain. When the TCC sets up the segment of the
TE LSP tunnel in its domain that is not a domain containing the tail
end of the tunnel, it needs a label and an interface from a
downstream domain, which is next to it along the path.
This document specifies extensions to PCEP for distributing a label
and an interface from a domain to its upstream domain along the path
for the TE LSP tunnel crossing multiple domains.
2. Terminology
ABR: Area Border Router. Routers used to connect two IGP areas
(areas in OSPF or levels in IS-IS).
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