Proxy MPLS Echo Request
RFC 7555

Document Type RFC - Proposed Standard (June 2015; Errata)
Last updated 2015-10-14
Replaces draft-lim-mpls-proxy-lsp-ping
Stream IETF
Formats plain text pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication Jun 2015
Document shepherd Loa Andersson
Shepherd write-up Show (last changed 2014-07-31)
IESG IESG state RFC 7555 (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)                        G. Swallow
Request for Comments: 7555                                        V. Lim
Category: Standards Track                                  Cisco Systems
ISSN: 2070-1721                                                S. Aldrin
                                                     Huawei Technologies
                                                               June 2015

                        Proxy MPLS Echo Request

Abstract

   This document defines a means of remotely initiating Multiprotocol
   Label Switched Protocol (MPLS) Pings on Label Switched Paths.  An
   MPLS Proxy Ping Request is sent to any Label Switching Router along a
   Label Switched Path.  The primary motivations for this facility are
   first to limit the number of messages and related processing when
   using LSP Ping in large Point-to-Multipoint LSPs, and second to
   enable tracing from leaf to leaf (or root).

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/rfc7555.

Copyright Notice

   Copyright (c) 2015 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.

Swallow, et al.              Standards Track                    [Page 1]
RFC 7555                     Proxy LSP Ping                    June 2015

Table of Contents

   1. Introduction ....................................................3
      1.1. Requirements Language ......................................4
      1.2. Terminology ................................................5
   2. Proxy Ping Overview .............................................5
      2.1. Initiating Proxy Ping ......................................6
      2.2. Handling at Proxy LSR ......................................6
           2.2.1. Backward Compatibility ..............................6
   3. Proxy MPLS Echo Request/Reply Procedures ........................7
      3.1. Procedures for the Initiator ...............................7
      3.2. Procedures for the Proxy LSR ...............................9
           3.2.1. Proxy LSR Handling When It Is Egress for FEC .......11
           3.2.2. Downstream Detailed Maps and Downstream
                  Maps in Proxy Reply ................................12
           3.2.3. Sending an MPLS Proxy Ping Reply ...................12
           3.2.4. Sending the MPLS Echo Requests .....................13
                  3.2.4.1. Forming the Base MPLS Echo Request ........13
                  3.2.4.2. Per-Interface Sending Procedures ..........14
   4. Proxy Ping Request/Reply Messages ..............................15
      4.1. Proxy Ping Request/Reply Message Formats ..................15
      4.2. Proxy Ping Request Message Contents .......................15
      4.3. Proxy Ping Reply Message Contents .........................16
   5. TLV Formats ....................................................16
      5.1. Proxy Echo Parameters TLV .................................16
           5.1.1. Next Hop Sub-TLV ...................................20
      5.2. Reply-to Address TLV ......................................21
      5.3. Upstream Neighbor Address TLV .............................21
      5.4. Downstream Neighbor Address TLV ...........................22
   6. Security Considerations ........................................23
   7. IANA Considerations ............................................24
      7.1. Proxy Echo Parameters Sub-TLVs ............................24
      7.2. Proxy Flags ...............................................25
      7.3. Downstream Address Mapping Registry .......................25
      7.4. Next Hop Sub-TLV Address Type Registry ....................25
   8. References .....................................................26
Show full document text