IS-IS Multi-Instance
RFC 8202

Document Type RFC - Proposed Standard (June 2017; No errata)
Obsoletes RFC 6822
Last updated 2017-06-16
Replaces draft-ginsberg-isis-mi-bis
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Christian Hopps
Shepherd write-up Show (last changed 2017-03-01)
IESG IESG state RFC 8202 (Proposed Standard)
Consensus Boilerplate Yes
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Responsible AD Alia Atlas
Send notices to "Christian Hopps" <chopps@chopps.org>
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                       L. Ginsberg
Request for Comments: 8202                                    S. Previdi
Obsoletes: 6822                                            Cisco Systems
Category: Standards Track                                  W. Henderickx
ISSN: 2070-1721                                                    Nokia
                                                               June 2017

                          IS-IS Multi-Instance

Abstract

   This document describes a mechanism that allows a single router to
   share one or more circuits among multiple Intermediate System to
   Intermediate System (IS-IS) routing protocol instances.

   Multiple instances allow the isolation of resources associated with
   each instance.  Routers will form instance-specific adjacencies.
   Each instance can support multiple topologies.  Each topology has a
   unique Link State Database (LSDB).  Each Protocol Data Unit (PDU)
   will contain a new Type-Length-Value (TLV) identifying the instance
   and the topology (or topologies) to which the PDU belongs.

   This document obsoletes RFC 6822.

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/rfc8202.

Ginsberg, et al.             Standards Track                    [Page 1]
RFC 8202                  IS-IS Multi-Instance                 June 2017

Copyright Notice

   Copyright (c) 2017 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. Requirements Language ...........................................4
   3. Elements of Procedure ...........................................4
      3.1. Instance Identifier TLV ....................................4
      3.2. Instance Membership ........................................6
      3.3. Use of Authentication ......................................6
      3.4. Adjacency Establishment ....................................6
           3.4.1. Point-to-Point Adjacencies ..........................6
           3.4.2. Multi-Access Adjacencies ............................7
      3.5. Update Process Operation ...................................7
           3.5.1. Update Process Operation on Point-to-Point
                  Circuits ............................................7
           3.5.2. Update Process Operation on Broadcast Circuits ......7
      3.6. Interoperability Considerations ............................7
           3.6.1. Interoperability Issues on Broadcast Circuits .......8
           3.6.2. Interoperability Using Point-to-Point Circuits ......9
   4. Usage Guidelines ................................................9
      4.1. One-to-One Mapping between Topologies and Instances .......10
      4.2. Many-to-One Mapping between Topologies and Instances ......10
      4.3. Considerations for the Number of Instances ................11
   5. Relationship to M-ISIS .........................................11
   6. Graceful Restart Interactions ..................................12
   7. IANA Considerations ............................................12
   8. Security Considerations ........................................12
   9. References .....................................................12
      9.1. Normative References ......................................12
      9.2. Informative References ....................................14
   Appendix A. Changes to RFC 6822 ...................................15
   Acknowledgements ..................................................15
   Authors' Addresses ................................................16

Ginsberg, et al.             Standards Track                    [Page 2]
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