IS-IS Path Computation and Reservation
draft-ietf-isis-pcr-03

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Document Type Active Internet-Draft (isis WG)
Last updated 2015-12-15 (latest revision 2015-11-30)
Replaces draft-farkas-isis-pcr
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IS-IS for IP Internets                                    J. Farkas, Ed.
Internet-Draft                                                  Ericsson
Intended status: Standards Track                                N. Bragg
Expires: June 2, 2016                                              Ciena
                                                            P. Unbehagen
                                                                   Avaya
                                                              G. Parsons
                                                                Ericsson
                                                        P. Ashwood-Smith
                                                     Huawei Technologies
                                                               C. Bowers
                                                        Juniper Networks
                                                       November 30, 2015

                 IS-IS Path Computation and Reservation
                         draft-ietf-isis-pcr-03

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 Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   and may be updated, replaced, or obsoleted by other documents at any
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   This Internet-Draft will expire on June 2, 2016.

Farkas, et al.            Expires June 2, 2016                  [Page 1]
Internet-Draft                  IS-IS PCR                  November 2015

Copyright Notice

   Copyright (c) 2015 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   3
   3.  Terminology and Definitions . . . . . . . . . . . . . . . . .   4
   4.  Explicit Trees  . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Explicit ECT Algorithms . . . . . . . . . . . . . . . . . . .  10
   6.  IS-IS PCR sub-TLVs  . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  Topology sub-TLV  . . . . . . . . . . . . . . . . . . . .  12
     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 . . . . . . . . . . . . . . . . . . . . .  23
   8.  Summary . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  28
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  28
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  28
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  28
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  28
     12.2.  Informative References . . . . . . . . . . . . . . . . .  29
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  31

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
   [IEEE8021aq] (already rolled into [IEEE8021Q]).  Furthermore, IS-IS
   with PCR extensions relies on the SPB architecture and terminology;
   and some of the IS-IS SPB sub-TLVs are also leveraged.  IS-IS PCR
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