BGP - Link State (BGP-LS) Advertisement of IGP Traffic Engineering Performance Metric Extensions
RFC 8571

Document Type RFC - Proposed Standard (March 2019; No errata)
Last updated 2019-03-15
Replaces draft-previdi-idr-bgpls-te-metric-extensions, draft-wu-idr-te-pm-bgp
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Stream WG state Submitted to IESG for Publication
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Internet Engineering Task Force (IETF)                  L. Ginsberg, Ed.
Request for Comments: 8571                           Cisco Systems, Inc.
Category: Standards Track                                     S. Previdi
ISSN: 2070-1721                                                    Q. Wu
                                                                  Huawei
                                                             J. Tantsura
                                                            Apstra, Inc.
                                                             C. Filsfils
                                                     Cisco Systems, Inc.
                                                              March 2019

               BGP - Link State (BGP-LS) Advertisement of
         IGP Traffic Engineering Performance Metric Extensions

Abstract

   This document defines new BGP - Link State (BGP-LS) TLVs in order to
   carry the IGP Traffic Engineering Metric Extensions defined in the
   IS-IS and OSPF protocols.

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/rfc8571.

Ginsberg, et al.             Standards Track                    [Page 1]
RFC 8571    BGP-LS Advertisement of IGP TE Metric Extensions  March 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 ....................................................2
   2. Link Attribute TLVs for TE Metric Extensions ....................3
      2.1. Unidirectional Link Delay TLV ..............................3
      2.2. Min/Max Unidirectional Link Delay TLV ......................4
      2.3. Unidirectional Delay Variation TLV .........................4
      2.4. Unidirectional Link Loss TLV ...............................5
      2.5. Unidirectional Residual Bandwidth TLV ......................5
      2.6. Unidirectional Available Bandwidth TLV .....................6
      2.7. Unidirectional Utilized Bandwidth TLV ......................6
      2.8. Mappings to IGP Source Sub-TLVs ............................7
   3. Security Considerations .........................................7
   4. IANA Considerations .............................................8
   5. References ......................................................8
      5.1. Normative References .......................................8
      5.2. Informative References .....................................9
   Acknowledgements ...................................................9
   Contributors .......................................................9
   Authors' Addresses ................................................10

1.  Introduction

   BGP - Link State (BGP-LS) [RFC7752] defines Network Layer
   Reachability Information (NLRI) and attributes in order to carry
   link-state information.  New BGP-LS Link Attribute TLVs are required
   in order to carry the Traffic Engineering Metric Extensions defined
   in [RFC8570] and [RFC7471].

Ginsberg, et al.             Standards Track                    [Page 2]
RFC 8571    BGP-LS Advertisement of IGP TE Metric Extensions  March 2019

2.  Link Attribute TLVs for TE Metric Extensions

   The following new Link Attribute TLVs are defined:

       TLV Code Point                 Value
      --------------------------------------------------------
       1114              Unidirectional Link Delay

       1115              Min/Max Unidirectional Link Delay

       1116              Unidirectional Delay Variation

       1117              Unidirectional Link Loss

       1118              Unidirectional Residual Bandwidth

       1119              Unidirectional Available Bandwidth

       1120              Unidirectional Utilized Bandwidth

   TLV formats are described in detail in the following subsections.
   TLV formats follow the rules defined in [RFC7752].
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