Return Path Specified Label Switched Path (LSP) Ping
RFC 7110
| Document | Type |
RFC - Proposed Standard
(January 2014; Errata)
Updated by RFC 7737
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-chen-mpls-return-path-specified-lsp-ping | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | WG Document | |
| Document shepherd | Loa Andersson | ||
| IESG | IESG state | RFC 7110 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Adrian Farrel | ||
| IESG note | Loa Andersson (loa@pi.nu) is the document shepherd. | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) M. Chen
Request for Comments: 7110 W. Cao
Category: Standards Track Huawei Technologies Co., Ltd
ISSN: 2070-1721 S. Ning
Tata Communications
F. Jounay
Orange CH
S. Delord
January 2014
Return Path Specified Label Switched Path (LSP) Ping
Abstract
This document defines extensions to the data-plane failure-detection
protocol for Multiprotocol Label Switching (MPLS) Label Switched
Paths (LSPs) known as "LSP ping". These extensions allow a selection
of the LSP to be used for the echo reply return path. Enforcing a
specific return path can be used to verify bidirectional connectivity
and also increase LSP ping robustness.
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/rfc7110.
Chen, et al. Standards Track [Page 1]
RFC 7110 Return Path Specified LSP Ping January 2014
Copyright Notice
Copyright (c) 2014 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 ...........................................3
3. Problem Statements and Solution Overview ........................3
3.1. Limitations of Existing Mechanisms for Bidirectional LSPs ..4
3.2. Limitations of Existing Mechanisms for Handling
Unreliable Return Paths ....................................4
4. Extensions ......................................................5
4.1. Reply via Specified Path Mode ..............................6
4.2. Reply Path (RP) TLV ........................................6
4.3. Tunnel Sub-TLVs ............................................8
4.3.1. IPv4 RSVP Tunnel Sub-TLV ...........................10
4.3.2. IPv6 RSVP Tunnel Sub-TLV ...........................11
4.3.3. Static Tunnel Sub-TLV ..............................12
4.4. Reply TC TLV ..............................................12
5. Theory of Operation ............................................13
5.1. Sending an Echo Request ...................................14
5.2. Receiving an Echo Request .................................14
5.3. Sending an Echo Reply .....................................15
5.4. Receiving an Echo Reply ...................................16
5.5. Non-IP Encapsulation for MPLS-TP LSPs .....................16
6. Security Considerations ........................................16
7. IANA Considerations ............................................17
7.1. TLVs ......................................................17
7.2. New Target FEC Stack Sub-TLVs .............................17
7.3. New Reply Mode ............................................17
7.4. Reply Path Return Code ....................................18
8. Contributors ...................................................19
9. Acknowledgements ...............................................19
10. References ....................................................19
10.1. Normative References .....................................19
10.2. Informative References ...................................20
Chen, et al. Standards Track [Page 2]
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