IS-IS Multi-Instance
RFC 6822
Document | Type |
RFC - Proposed Standard
(December 2012; Errata)
Obsoleted by RFC 8202
Was draft-ietf-isis-mi (isis WG)
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Authors | Stefano Previdi , Les Ginsberg , Mike Shand , Abhay Roy , David Ward | ||
Last updated | 2020-01-21 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata bibtex | ||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6822 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Adrian Farrel | ||
IESG note | Chris Hopps (chopps@rawdofmt.org) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) S. Previdi, Ed. Request for Comments: 6822 L. Ginsberg Category: Standards Track Cisco Systems ISSN: 2070-1721 M. Shand A. Roy D. Ward Cisco Systems December 2012 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. 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/rfc6822. Previdi, et al. Standards Track [Page 1] RFC 6822 IS-IS Multi-Instance December 2012 Copyright Notice Copyright (c) 2012 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. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Previdi, et al. Standards Track [Page 2] RFC 6822 IS-IS Multi-Instance December 2012 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 4 2. Elements Of Procedure . . . . . . . . . . . . . . . . . . . . 4 2.1. Instance Identifier TLV . . . . . . . . . . . . . . . . . 5 2.2. Instance Membership . . . . . . . . . . . . . . . . . . . 6 2.3. Use of Authentication . . . . . . . . . . . . . . . . . . 6 2.4. Adjacency Establishment . . . . . . . . . . . . . . . . . 6 2.4.1. Point-to-Point Adjacencies . . . . . . . . . . . . . . 7 2.4.2. Multi-Access Adjacencies . . . . . . . . . . . . . . . 7 2.5. Update Process Operation . . . . . . . . . . . . . . . . . 7 2.5.1. Update Process Operation on Point-to-Point Circuits . 7 2.5.2. Update Process Operation on Broadcast Circuits . . . . 7 2.6. Interoperability Considerations . . . . . . . . . . . . . 8 2.6.1. Interoperability Issues on Broadcast Circuits . . . . 8 2.6.2. Interoperability Using Point-to-Point Circuits . . . . 9 3. Usage Guidelines . . . . . . . . . . . . . . . . . . . . . . . 9 3.1. One-to-One Mapping between Topologies and Instances . . . 10 3.2. Many-to-One Mapping between Topologies and Instances . . . 10 3.3. Considerations for the Number of Instances . . . . . . . . 11 4. Relationship to M-ISIS . . . . . . . . . . . . . . . . . . . . 11Show full document text