IS-IS Traffic Engineering (TE) Metric Extensions
RFC 7810

Document Type RFC - Proposed Standard (May 2016; No errata)
Last updated 2016-05-09
Replaces draft-previdi-isis-te-metric-extensions
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Hannes Gredler
Shepherd write-up Show (last changed 2015-12-11)
IESG IESG state RFC 7810 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alvaro Retana
Send notices to "Hannes Gredler" <hannes@gredler.at>, aretana@cisco.com
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                   S. Previdi, Ed.
Request for Comments: 7810                           Cisco Systems, Inc.
Category: Standards Track                                   S. Giacalone
ISSN: 2070-1721                                                Microsoft
                                                                 D. Ward
                                                     Cisco Systems, Inc.
                                                                J. Drake
                                                        Juniper Networks
                                                                   Q. Wu
                                                                  Huawei
                                                                May 2016

            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) such that network-performance information can
   be distributed and collected 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.

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 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7810.

Previdi, et al.              Standards Track                    [Page 1]
RFC 7810               IS-IS TE Metric Extensions               May 2016

Copyright Notice

   Copyright (c) 2016 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
   (http://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.  TE Metric Extensions to IS-IS . . . . . . . . . . . . . . . .   4
   3.  Interface and Neighbor Addresses  . . . . . . . . . . . . . .   5
   4.  Sub-TLV Details . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Unidirectional Link Delay Sub-TLV . . . . . . . . . . . .   6
     4.2.  Min/Max Unidirectional Link Delay Sub-TLV . . . . . . . .   7
     4.3.  Unidirectional Delay Variation Sub-TLV  . . . . . . . . .   8
     4.4.  Unidirectional Link Loss Sub-TLV  . . . . . . . . . . . .   9
     4.5.  Unidirectional Residual Bandwidth Sub-TLV . . . . . . . .  10
     4.6.  Unidirectional Available Bandwidth Sub-TLV  . . . . . . .  11
     4.7.  Unidirectional Utilized Bandwidth Sub-TLV . . . . . . . .  12
   5.  Announcement Thresholds and Filters . . . . . . . . . . . . .  12
   6.  Announcement Suppression  . . . . . . . . . . . . . . . . . .  13
   7.  Network Stability and Announcement Periodicity  . . . . . . .  14
   8.  Enabling and Disabling Sub-TLVs . . . . . . . . . . . . . . .  14
   9.  Static Metric Override  . . . . . . . . . . . . . . . . . . .  14
   10. Compatibility . . . . . . . . . . . . . . . . . . . . . . . .  14
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  15
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  16
     13.2.  Informative References . . . . . . . . . . . . . . . . .  16
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