A Primer on the Development of MPLS
draft-bryant-mpls-dev-primer-00
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Stewart Bryant
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2021-03-31
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MPLS S. Bryant
Internet-Draft Futurewei US
Intended status: Informational March 31, 2021
Expires: October 2, 2021
A Primer on the Development of MPLS
draft-bryant-mpls-dev-primer-00
Abstract
There has been significant recent interest in developing MPLS to
address new needs. This memo collects together various documents
that together describe the key aspects of the MPLS architecture
together with the development proposals that the author is aware of.
The purpose of this document is to bring everyone up to speed on the
rational for the existing design and to alert them to the new
proposals.
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 October 2, 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
(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
Bryant Expires October 2, 2021 [Page 1]
Internet-Draft MPLS-Dev-Primer March 2021
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. Background Documents . . . . . . . . . . . . . . . . . . . . 3
2.1. Multiprotocol Label Switching Architecture (RFC 3031) . . 3
2.2. MPLS Label Stack Encoding (RFC 3032) . . . . . . . . . . 4
2.3. Control Word for Use over an MPLS PSN (RFC5586) . . . . . 4
2.4. Avoiding Equal Cost Multipath (ECMP) Treatment in MPLS
Network . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5. Synonymous Flow Labels . . . . . . . . . . . . . . . . . 5
2.6. Residence Time Measurement in MPLS Networks . . . . . . . 5
3. New Proposals . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. MPLS Extension Header Architecture . . . . . . . . . . . 5
3.2. MPLS Label Operations in MPLS EH capable networks . . . . 6
3.3. Encapsulation For MPLS Performance Measurement with
Alternate Marking . . . . . . . . . . . . . . . . . . . . 7
3.4. MPLS Data Plane Encapsulation for In-situ OAM Data . . . 7
3.5. Multi-purpose Special Purpose Label for Forwarding
Actions . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6. No Further Fast Reroute . . . . . . . . . . . . . . . . . 8
3.7. Carrying Virtual Transport Network Identifier in MPLS
Packet . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.8. Segment Routed Time Sensitive Networking . . . . . . . . 8
3.9. Options for MPLS Extension Header Indicator . . . . . . . 8
3.10. MPLS Extension Header . . . . . . . . . . . . . . . . . . 9
3.11. MPLS Payload Protocol Identifier . . . . . . . . . . . . 9
3.12. Generic Transport Functions . . . . . . . . . . . . . . . 10
4. Security Considerations . . . . . . . . . . . . . . . . . . . 10
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1. Normative References . . . . . . . . . . . . . . . . . . 10
6.2. Informative References . . . . . . . . . . . . . . . . . 10
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
There has been significant recent interest in developing the MPLS
data plane to address new needs. This memo collects together various
documents that together describe the key aspects of the MPLS
architecture together with the development proposals that the author
is aware of.
The intent of this work is to bring everyone up to speed on the
rational for the existing design and to alert them to the new
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