IS-IS Traffic Engineering (TE) Metric Extensions
RFC 8570

Document Type RFC - Proposed Standard (March 2019; No errata)
Obsoletes RFC 7810
Last updated 2019-03-15
Replaces draft-ginsberg-lsr-isis-rfc7810bis
Stream IETF
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Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Ketan Talaulikar
Shepherd write-up Show (last changed 2018-07-24)
IESG IESG state RFC 8570 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alvaro Retana
Send notices to Ketan Talaulikar <ketant@cisco.com>, aretana.ietf@gmail.com
IANA IANA review state IANA OK - Actions Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                  L. Ginsberg, Ed.
Request for Comments: 8570                           Cisco Systems, Inc.
Obsoletes: 7810                                          S. Previdi, Ed.
Category: Standards Track                                         Huawei
ISSN: 2070-1721                                             S. Giacalone
                                                               Microsoft
                                                                 D. Ward
                                                     Cisco Systems, Inc.
                                                                J. Drake
                                                        Juniper Networks
                                                                   Q. Wu
                                                                  Huawei
                                                              March 2019

            IS-IS Traffic Engineering (TE) Metric Extensions

Abstract

   In certain networks, such as, but not limited to, financial
   information networks (e.g., stock market data providers), network-
   performance criteria (e.g., latency) are becoming as critical to
   data-path selection as other metrics.

   This document describes extensions to IS-IS Traffic Engineering
   Extensions (RFC 5305).  These extensions provide a way to distribute
   and collect network-performance information in a scalable fashion.
   The information distributed using IS-IS TE Metric Extensions can then
   be used to make path-selection decisions based on network
   performance.

   Note that this document only covers the mechanisms with which
   network-performance information is distributed.  The mechanisms for
   measuring network performance or acting on that information, once
   distributed, are outside the scope of this document.

   This document obsoletes RFC 7810.

Ginsberg, et al.             Standards Track                    [Page 1]
RFC 8570               IS-IS TE Metric Extensions             March 2019

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/rfc8570.

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.

Ginsberg, et al.             Standards Track                    [Page 2]
RFC 8570               IS-IS TE Metric Extensions             March 2019

Table of Contents

   1. Introduction ....................................................3
      1.1. Requirements Language ......................................4
   2. TE Metric Extensions to IS-IS ...................................5
   3. Interface and Neighbor Addresses ................................6
   4. Sub-TLV Details .................................................7
      4.1. Unidirectional Link Delay Sub-TLV ..........................7
      4.2. Min/Max Unidirectional Link Delay Sub-TLV ..................8
      4.3. Unidirectional Delay Variation Sub-TLV .....................9
      4.4. Unidirectional Link Loss Sub-TLV ..........................10
      4.5. Unidirectional Residual Bandwidth Sub-TLV .................11
      4.6. Unidirectional Available Bandwidth Sub-TLV ................12
      4.7. Unidirectional Utilized Bandwidth Sub-TLV .................13
   5. Announcement Thresholds and Filters ............................13
   6. Announcement Suppression .......................................14
   7. Network Stability and Announcement Periodicity .................15
   8. Enabling and Disabling Sub-TLVs ................................15
   9. Static Metric Override .........................................15
   10. Compatibility .................................................15
   11. Security Considerations .......................................15
   12. IANA Considerations ...........................................16
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