Resource Reservation Protocol (RSVP) Message Formats for Label Switched Path (LSP) Attributes Objects
RFC 6510
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RFC - Proposed Standard
(February 2012; No errata)
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Last updated |
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2015-10-14
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draft-berger-ccamp-attribute-bnf
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IETF
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RFC 6510 (Proposed Standard)
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Adrian Farrel
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Deborah Brungard (dbrungard@att.com) is the Document Shepherd.
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Internet Engineering Task Force (IETF) L. Berger
Request for Comments: 6510 LabN
Updates: 4875, 5420 G. Swallow
Category: Standards Track Cisco
ISSN: 2070-1721 February 2012
Resource Reservation Protocol (RSVP) Message Formats for
Label Switched Path (LSP) Attributes Objects
Abstract
Multiprotocol Label Switching (MPLS) Label Switched Paths (LSPs)
established using the Resource Reservation Protocol Traffic
Engineering (RSVP-TE) extensions may be signaled with a set of LSP-
specific attributes. These attributes may be carried in both Path
and Resv messages. This document specifies how LSP attributes are to
be carried in RSVP Path and Resv messages using the Routing Backus-
Naur Form and clarifies related Resv message formats. This document
updates RFC 4875 and RFC 5420.
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/rfc6510.
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
Berger & Swallow Standards Track [Page 1]
RFC 6510 RSVP Message Formats for LSP Attributes February 2012
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 ....................................................2
1.1. Conventions Used in This Document ..........................3
2. Path Messages ...................................................3
2.1. Path Message Format ........................................3
3. Resv Messages ...................................................4
3.1. Resv Message Format -- Per LSP Operational Status ..........5
3.2. Resv Message Format -- Per S2L Operational Status ..........6
3.2.1. Compatibility .......................................6
4. Security Considerations .........................................6
5. Acknowledgments .................................................7
6. References ......................................................7
6.1. Normative References .......................................7
6.2. Informative References .....................................7
1. Introduction
Signaling in support of Multiprotocol Label Switching (MPLS) and
Generalized MPLS (GMPLS) point-to-point Label Switched Paths (LSPs)
is defined in [RFC3209] and [RFC3473]. [RFC4875] defines signaling
support for point-to-multipoint (P2MP) Traffic Engineering (TE) LSPs.
Two LSP Attributes objects are defined in [RFC5420]. These objects
may be used to provide additional information related to how an LSP
should be set up when carried in a Path message and, when carried in
a Resv message, how an LSP has been established. The definition of
the objects includes a narrative description of related message
formats (see Section 9 of [RFC5420]). This definition does not
provide the related Routing Backus-Naur Form (BNF) [RFC5511] that is
typically used to define how messages are to be constructed using
RSVP objects. The current message format description has led to the
open question of how the LSP Attributes objects are to be processed
in Resv messages of P2MP LSPs (which are defined in [RFC4875]).
This document provides the BNF for Path and Resv messages carrying
the LSP Attributes object. The definition clarifies how the objects
are to be carried for all LSP types. Both Path and Resv message BNF
is provided for completeness.
Berger & Swallow Standards Track [Page 2]
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