IS-IS Path Control and Reservation
RFC 7813

Document Type RFC - Proposed Standard (June 2016; No errata)
Last updated 2016-06-16
Replaces draft-farkas-isis-pcr
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Hannes Gredler
Shepherd write-up Show (last changed 2015-11-10)
IESG IESG state RFC 7813 (Proposed Standard)
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Send notices to "Hannes Gredler" <hannes@gredler.at>
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Internet Engineering Task Force (IETF)                    J. Farkas, Ed.
Request for Comments: 7813                                      Ericsson
Category: Standards Track                                       N. Bragg
ISSN: 2070-1721                                                    Ciena
                                                            P. Unbehagen
                                                                   Avaya
                                                              G. Parsons
                                                                Ericsson
                                                        P. Ashwood-Smith
                                                     Huawei Technologies
                                                               C. Bowers
                                                        Juniper Networks
                                                               June 2016

                   IS-IS Path Control and Reservation

Abstract

   IEEE 802.1Qca Path Control and Reservation (PCR) specifies explicit
   path control via IS-IS in Layer 2 networks in order to move beyond
   the shortest path capabilities provided by IEEE 802.1aq Shortest Path
   Bridging (SPB).  IS-IS PCR provides capabilities for the
   establishment and control of explicit forwarding trees in a Layer 2
   network domain.  This document specifies the sub-TLVs for IS-IS PCR.

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
   http://www.rfc-editor.org/info/rfc7813.

Farkas, et al.               Standards Track                    [Page 1]
RFC 7813                        IS-IS PCR                      June 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
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   4
   3.  Terminology and Definitions . . . . . . . . . . . . . . . . .   4
   4.  Explicit Trees  . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Explicit ECT Algorithms . . . . . . . . . . . . . . . . . . .   9
   6.  IS-IS PCR Sub-TLVs  . . . . . . . . . . . . . . . . . . . . .  11
     6.1.  Topology Sub-TLV  . . . . . . . . . . . . . . . . . . . .  11
     6.2.  Hop Sub-TLV . . . . . . . . . . . . . . . . . . . . . . .  15
     6.3.  Bandwidth Constraint Sub-TLV  . . . . . . . . . . . . . .  19
     6.4.  Bandwidth Assignment Sub-TLV  . . . . . . . . . . . . . .  21
     6.5.  Timestamp Sub-TLV . . . . . . . . . . . . . . . . . . . .  23
   7.  MRT-FRR Application . . . . . . . . . . . . . . . . . . . . .  24
   8.  Summary . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  29
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  29
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  30
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  30
     11.2.  Informative References . . . . . . . . . . . . . . . . .  31
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  32
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  32

Farkas, et al.               Standards Track                    [Page 2]
RFC 7813                        IS-IS PCR                      June 2016

1.  Introduction

   IEEE 802.1Qca Path Control and Reservation (PCR) [IEEE8021Qca]
   specifies extensions to IS-IS for the control of Explicit Trees
   (ETs).  The PCR extensions are compatible with the Shortest Path
   Bridging (SPB) extensions to IS-IS specified by [RFC6329] and
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