Extensions to Path Computation Element Protocol (PCEP) to Support Resource Sharing-based Path Computation
draft-zhang-pce-resource-sharing-09
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PCE Working Group Xian Zhang
Internet Draft Haomian Zheng
Category: Standards track Huawei Technologies
Oscar Gonzales de Dios
Victor Lopez
Telefonica I+D
Expires: August 13, 2019 February 13, 2019
Extensions to Path Computation Element Protocol (PCEP) to Support
Resource Sharing-based Path Computation
draft-zhang-pce-resource-sharing-09
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with
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This Internet-Draft will expire on August 13, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
Zhang et al Expires August 2019 [Page 1]
draft-zhang-pce-resource-sharing-09 February 2019
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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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].
Abstract
Resource sharing in a network means two or more Label Switched Paths
(LSPs) use common piece(s) of resource along their paths. This can
help save network resource and is useful in scenarios such as LSP
recovery or when two LSPs do not need to be active at the same time.
A Path Computation Element (PCE) is responsible for path computation
with such requirement. The resource-sharing-based path computation
with better efficiency can be achieved together with the association
object in PCEP.
This document extends the Path Computation Element Protocol (PCEP)
in order to support resource sharing-based path computation, which
is a special case in the association path computation.
Table of Contents
1. Introduction and Motivation .................................. 3
2. Motivation .................................................. 4
2.1. Single Domain Use Case .................................. 4
2.2. Multiple Domains Use Case ............................... 7
2.3. Bulk Path Computation Use Case .......................... 8
3. Extensions to PCEP .......................................... 10
3.1. Association group and type ............................. 10
3.2. Resource Sharing TLV ................................... 10
3.3. Processing Rules ....................................... 11
4. Security Considerations ..................................... 12
5. IANA Considerations ......................................... 13
5.1. Association Object Type Indicators ..................... 13
6. References .................................................. 14
Zhang et al Expires August 2019 [Page 2]
draft-zhang-pce-resource-sharing-09 February 2019
6.1. Normative References ................................... 14
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