Carrying Binding Label/Segment-ID in PCE-based Networks.
draft-ietf-pce-binding-label-sid-02
PCE Working Group S. Sivabalan
Internet-Draft C. Filsfils
Intended status: Standards Track Cisco Systems, Inc.
Expires: September 10, 2020 J. Tantsura
Apstra, Inc.
J. Hardwick
Metaswitch Networks
S. Previdi
C. Li
Huawei Technologies
March 9, 2020
Carrying Binding Label/Segment-ID in PCE-based Networks.
draft-ietf-pce-binding-label-sid-02
Abstract
In order to provide greater scalability, network opacity, and service
independence, Segment Routing (SR) utilizes a Binding Segment
Identifier (BSID). It is possible to associate a BSID to RSVP-TE
signaled Traffic Engineering Label Switching Path or binding Segment-
ID (SID) to SR Traffic Engineering path. Such a binding label/SID
can be used by an upstream node for steering traffic into the
appropriate TE path to enforce SR policies. This document proposes
an approach for reporting binding label/SID to Path Computation
Element (PCE) for supporting PCE-based Traffic Engineering policies.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
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
Sivabalan, et al. Expires September 10, 2020 [Page 1]
Internet-Draft Binding Label/SID March 2020
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 September 10, 2020.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Path Binding TLV . . . . . . . . . . . . . . . . . . . . . . 6
4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Binding SID in SR-ERO . . . . . . . . . . . . . . . . . . . . 8
6. Binding SID in SRv6-ERO . . . . . . . . . . . . . . . . . . . 8
7. Implementation Status . . . . . . . . . . . . . . . . . . . . 9
7.1. Huawei . . . . . . . . . . . . . . . . . . . . . . . . . 9
8. Security Considerations . . . . . . . . . . . . . . . . . . . 9
9. Manageability Considerations . . . . . . . . . . . . . . . . 10
9.1. Control of Function and Policy . . . . . . . . . . . . . 10
9.2. Information and Data Models . . . . . . . . . . . . . . . 10
9.3. Liveness Detection and Monitoring . . . . . . . . . . . . 10
9.4. Verify Correct Operations . . . . . . . . . . . . . . . . 10
9.5. Requirements On Other Protocols . . . . . . . . . . . . . 10
9.6. Impact On Network Operations . . . . . . . . . . . . . . 11
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
10.1. PCEP TLV Type Indicators . . . . . . . . . . . . . . . . 11
10.1.1. TE-PATH-BINDING TLV . . . . . . . . . . . . . . . . 11
10.2. PCEP Error Type and Value . . . . . . . . . . . . . . . 11
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
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