IS-IS Path Computation and Reservation
draft-ietf-isis-pcr-00
IS-IS for IP Internets J. Farkas, Ed.
Internet-Draft Ericsson
Intended status: Standards Track N. Bragg
Expires: October 31, 2015 Ciena
P. Unbehagen
Avaya
G. Parsons
Ericsson
P. Ashwood-Smith
Huawei Technologies
C. Bowers
Juniper Networks
April 29, 2015
IS-IS Path Computation and Reservation
draft-ietf-isis-pcr-00
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
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This Internet-Draft will expire on October 31, 2015.
Farkas, et al. Expires October 31, 2015 [Page 1]
Internet-Draft IS-IS PCR April 2015
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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 . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . 30
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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