Label Switched Path (LSP) Ping and Traceroute Reply Mode Simplification
RFC 7737
| Document | Type |
RFC - Proposed Standard
(January 2016; No errata)
Updates RFC 7110
|
|
|---|---|---|---|
| Last updated | 2016-01-22 | ||
| Replaces | draft-akiya-mpls-lsp-ping-reply-mode-simple | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Ross Callon | ||
| Shepherd write-up | Show (last changed 2015-05-11) | ||
| IESG | IESG state | RFC 7737 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Deborah Brungard | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) N. Akiya
Request for Comments: 7737 Big Switch Networks
Updates: 7110 G. Swallow
Category: Standards Track C. Pignataro
ISSN: 2070-1721 Cisco Systems
L. Andersson
M. Chen
Huawei
January 2016
Label Switched Path (LSP) Ping and Traceroute Reply Mode Simplification
Abstract
The Multiprotocol Label Switching (MPLS) Label Switched Path (LSP)
Ping and Traceroute use the Reply Mode field to signal the method to
be used in the MPLS echo reply. This document updates the procedures
for the "Reply via Specified Path" Reply Mode. The value of this
Reply Mode is 5. The update creates a simple way to indicate that
the reverse LSP should be used as the return path. This document
also adds an optional TLV that can carry an ordered list of Reply
Mode values.
This document updates RFC 7110.
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/rfc7737.
Akiya, et al. Standards Track [Page 1]
RFC 7737 LSP Ping Reply Mode Simplification January 2016
Copyright Notice
Copyright (c) 2016 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. Problem Statements . . . . . . . . . . . . . . . . . . . . . 4
3. Solution . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. "Reply via Specified Path" Reply Mode Update . . . . . . 5
3.2. Reply Mode Order TLV . . . . . . . . . . . . . . . . . . 6
4. Relationships to Other LSP Ping and Traceroute Features . . . 8
4.1. Backwards Compatibility with "Reply via Specified Path"
Reply Mode . . . . . . . . . . . . . . . . . . . . . . . 8
4.2. Reply Path TLV . . . . . . . . . . . . . . . . . . . . . 8
4.2.1. Example 1: Reply Mode Order TLV Usage with Reply Path
TLV . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.2. Example 2: Reply Mode Order TLV Usage with Reply Path
TLV . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3. Proxy LSP Ping . . . . . . . . . . . . . . . . . . . . . 10
4.3.1. Proxy LSR Sending an MPLS Echo Request . . . . . . . 10
4.3.2. Proxy LSR Sending an MPLS Proxy Ping Reply . . . . . 11
5. Security Considerations . . . . . . . . . . . . . . . . . . . 11
6. Manageability Considerations . . . . . . . . . . . . . . . . 11
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
7.1. New Reply Mode Order TLV . . . . . . . . . . . . . . . . 12
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.1. Normative References . . . . . . . . . . . . . . . . . . 12
8.2. Informative References . . . . . . . . . . . . . . . . . 13
Appendix A. Reply Mode Order TLV Beneficial Scenarios . . . . . 14
A.1. Incorrect Forwarding Scenario . . . . . . . . . . . . . . 14
A.2. Non-Co-Routed Bidirectional LSP Scenario . . . . . . . . 15
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 16
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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