Ethernet Traffic Parameters with Availability Information
RFC 8625

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Internet Engineering Task Force (IETF)                           H. Long
Request for Comments: 8625                                    M. Ye, Ed.
Category: Standards Track                  Huawei Technologies Co., Ltd.
ISSN: 2070-1721                                           G. Mirsky, Ed.
                                                                     ZTE
                                                         A. D'Alessandro
                                                    Telecom Italia S.p.A
                                                                 H. Shah
                                                                   Ciena
                                                             August 2019

       Ethernet Traffic Parameters with Availability Information

Abstract

   A packet-switching network may contain links with variable bandwidths
   (e.g., copper and radio).  The bandwidth of such links is sensitive
   to the external environment (e.g., climate).  Availability is
   typically used to describe these links when doing network planning.
   This document introduces an optional Bandwidth Availability TLV in
   RSVP-TE signaling.  This extension can be used to set up a GMPLS
   Label Switched Path (LSP) in conjunction with the Ethernet
   SENDER_TSPEC object.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8625.

Long, et al.                 Standards Track                    [Page 1]
RFC 8625            Availability Extension to RSVP-TE        August 2019

Copyright Notice

   Copyright (c) 2019 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
   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 ....................................................3
      1.1. Conventions Used in This Document ..........................4
   2. Overview ........................................................4
   3. Extension to RSVP-TE Signaling ..................................5
      3.1. Bandwidth Availability TLV .................................5
      3.2. Signaling Process ..........................................6
   4. Security Considerations .........................................7
   5. IANA Considerations .............................................8
   6. References ......................................................8
      6.1. Normative References .......................................8
      6.2. Informative References .....................................9
   Appendix A.  Bandwidth Availability Example .......................11
   Acknowledgments ...................................................13
   Authors' Addresses ................................................13

Long, et al.                 Standards Track                    [Page 2]
RFC 8625            Availability Extension to RSVP-TE        August 2019

1.  Introduction

   The RSVP-TE specification [RFC3209] and GMPLS extensions [RFC3473]
   specify the signaling message, including the bandwidth request for
   setting up an LSP in a packet-switching network.

   Some data communication technologies allow a seamless change of the
   maximum physical bandwidth through a set of known discrete values.
   The parameter availability [G.827] [F.1703] [P.530] is often used to
   describe the link capacity during network planning.  The availability
   is based on a time scale, which is a proportion of the operating time
   that the requested bandwidth is ensured.  A more detailed example of
   bandwidth availability can be found in Appendix A.  Assigning
   different bandwidth availability classes to different types of
   services over links with variable discrete bandwidth provides for a
   more efficient planning of link capacity.  To set up an LSP across
   these links, bandwidth availability information is required for the
   nodes to verify bandwidth satisfaction and make a bandwidth