IPv6 Traffic Engineering in IS-IS
RFC 6119
Document | Type | RFC - Proposed Standard (February 2011; No errata) | |
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Authors | Jon Berger , Mike Bartlett , Jon Harrison | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6119 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Stewart Bryant | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) J. Harrison Request for Comments: 6119 J. Berger Category: Standards Track M. Bartlett ISSN: 2070-1721 Metaswitch Networks February 2011 IPv6 Traffic Engineering in IS-IS Abstract This document specifies a method for exchanging IPv6 traffic engineering information using the IS-IS routing protocol. This information enables routers in an IS-IS network to calculate traffic- engineered routes using IPv6 addresses. 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/rfc6119. Copyright Notice Copyright (c) 2011 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. Harrison, et al. Standards Track [Page 1] RFC 6119 IPv6 Traffic Engineering in IS-IS February 2011 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. 1. Overview The IS-IS routing protocol is defined in [IS-IS]. Each router generates a Link State PDU (LSP) that contains information describing the router and the links from the router. The information in the LSP is encoded in a variable length data structure consisting of a Type, Length, and Value. Such a data structure is referred to as a TLV. [TE] and [GMPLS] define a number of TLVs and sub-TLVs that allow Traffic Engineering (TE) information to be disseminated by the IS-IS protocol [IS-IS]. The addressing information passed in these TLVs is IPv4 specific. [IPv6] describes how the IS-IS protocol can be used to carry out Shortest Path First (SPF) routing for IPv6. It does this by defining IPv6-specific TLVs that are analogous to the TLVs used by IS-IS for carrying IPv4 addressing information. Multiprotocol Label Switching (MPLS) traffic engineering is very successful, and, as the use of IPv6 grows, there is a need to be able to support traffic engineering in IPv6 networks. This document defines the TLVs that allow traffic engineering information (including Generalized-MPLS (GMPLS) TE information) to be carried in IPv6 IS-IS networks. 2. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [KEYWORDS]. Harrison, et al. Standards Track [Page 2] RFC 6119 IPv6 Traffic Engineering in IS-IS February 2011 3. Summary of Operation 3.1. Identifying IS-IS Links Using IPv6 Addresses Each IS-IS link has certain properties -- bandwidth, shared risk link groups (SRLGs), switching capabilities, and so on. The IS-IS extensions defined in [TE] and [GMPLS] describe how to associate these traffic engineering parameters with IS-IS links. These TLVs use IPv4 addresses to identify the link (or local/remote link identifiers on unnumbered links). When IPv6 is used, a numbered link may be identified by IPv4 and/or IPv6 interface addresses. The type of identifier used does notShow full document text