Node Behavior upon Originating and Receiving Resource Reservation Protocol (RSVP) Path Error Messages
RFC 5711
| Document | Type |
RFC - Proposed Standard
(January 2010; No errata)
Updates RFC 3209
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-vasseur-mpls-3209-patherr | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5711 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Adrian Farrel | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) JP. Vasseur, Ed.
Request for Comments: 5711 G. Swallow
Updates: 3209 Cisco Systems, Inc.
Category: Standards Track I. Minei
ISSN: 2070-1721 Juniper Networks
January 2010
Node Behavior upon Originating and Receiving Resource Reservation
Protocol (RSVP) Path Error Messages
Abstract
The aim of this document is to describe a common practice with regard
to the behavior of nodes that send and receive a Resource Reservation
Protocol (RSVP) Traffic Engineering (TE) Path Error messages for a
preempted Multiprotocol Label Switching (MPLS) or Generalized MPLS
(GMPLS) Traffic Engineering Label Switched Path (TE LSP). (For
reference to the notion of TE LSP preemption, see RFC 3209.) This
document does not define any new protocol extensions.
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/rfc5711.
Vasseur, et al. Standards Track [Page 1]
RFC 5711 Node Behavior with RSVP PathErr January 2010
Copyright Notice
Copyright (c) 2010 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
1.1. Requirements Language ......................................3
2. Protocol Behavior ...............................................3
2.1. Behavior at Detecting Nodes ................................4
2.2. Behavior at Receiving Nodes ................................5
2.3. Data-Plane Behavior ........................................5
3. RSVP PathErr Messages for a Preempted TE LSP ....................5
4. Security Considerations .........................................5
5. Acknowledgements ................................................6
6. References ......................................................6
6.1. Normative References .......................................6
6.2. Informative References .....................................6
Vasseur, et al. Standards Track [Page 2]
RFC 5711 Node Behavior with RSVP PathErr January 2010
1. Introduction
The aim of this document is to describe a common practice with regard
to the behavior of a node sending a Resource Reservation Protocol
(RSVP) Traffic Engineering (TE) Path Error message and to the
behavior of a node receiving an RSVP Path Error message for a
preempted Multiprotocol Label Switching (MPLS) and Generalized MPLS
(GMPLS) Traffic Engineering Label Switched Path (TE LSP). (For
reference to the notion of TE LSP preemption, see [RFC3209]).
[RFC2205] defines two RSVP error message types: PathErr and ResvErr
that are generated when an error occurs. Path Error messages
(PathErr) are used to report errors and travel upstream toward the
head-end of the flow. Resv Error messages (ResvErr) travel
downstream toward the tail-end of the flow.
This document describes only PathErr message processing for the
specific case of a preempted TE LSP, where the term preemption is
defined in [RFC3209].
1.1. 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 RFC 2119 [RFC2119].
2. Protocol Behavior
PathErr messages are routed hop-by-hop using the path state
established when a Path message is routed through the network from
the head-end to its tail-end.
As stated in [RFC2205], PathErr messages do not modify the state of
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