Path Computation Element Protocol(PCEP) Extension for RSVP Color
draft-rajagopalan-pcep-rsvp-color-00
PCE Working Group B. Rajagopalan
Internet-Draft V. Beeram
Intended status: Standards Track Juniper Networks
Expires: July 19, 2021 G. Mishra
Verizon Communications Inc.
January 15, 2021
Path Computation Element Protocol(PCEP) Extension for RSVP Color
draft-rajagopalan-pcep-rsvp-color-00
Abstract
This document specifies extensions to Path Computation Element
Protocol (PCEP) to carry a newly defined attribute of RSVP LSP called
'color' that can be used as a guiding criterion for selecting the LSP
as a next hop for a service route.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on July 19, 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
Rajagopalan, et al. Expires July 19, 2021 [Page 1]
Internet-Draft PCEP RSVP Color January 2021
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Protocol Operation . . . . . . . . . . . . . . . . . . . . . 3
3. TLV Format . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Usage with BGP-CT . . . . . . . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . 4
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 5
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
8.1. Normative References . . . . . . . . . . . . . . . . . . 5
8.2. Informative References . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
This document defines a new RSVP LSP property, called "color", that
can be exchanged over PCEP. The 'color' field can be used as one of
the guiding criteria in selecting the LSP as a next hop for service
prefixes.
While the specific details of how the service prefixes are associated
with the appropriate RSVP LSP's are outside the scope of this
specification, the envisioned high level usage of the 'color' field
is as follows.
The service prefixes are marked with some indication of the type of
underlay they need. The underlay LSP's carry corresponding markings,
which we refer to as "color" in this specification, enabling an
ingress node to associate the service prefixes with the appropriate
underlay LSP's.
As an example, for a BGP-based service, the originating PE could
attach some community, e.g. the Extended Color Community [RFC5512]
with the service route. A receiving PE could use locally configured
policies to associate service routes carrying Extended Color
Community 'X' with underlay RSVP LSP's of color 'Y'.
While the Extended Color Community provides a convenient method to
perform the mapping, the policy on the ingress node is free to
Rajagopalan, et al. Expires July 19, 2021 [Page 2]
Internet-Draft PCEP RSVP Color January 2021
classify on any property of the route to select underlay RSVP LSP's
of a certain color.
2. Protocol Operation
The STATEFUL-PCE-CAPABILITY negotiation message is enhanced to carry
Show full document text