Proxy MPLS Echo Request
draft-ietf-mpls-proxy-lsp-ping-00

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Network Working Group                                         G. Swallow
Internet-Draft                                                    V. Lim
Intended status: Standards Track                           Cisco Systems
Expires: January 06, 2014                                      S. Aldrin
                                                     Huawei Technologies
                                                           July 05, 2013

                        Proxy MPLS Echo Request
                   draft-ietf-mpls-proxy-lsp-ping-00

Abstract

   This document defines a means of remotely initiating Multiprotocol
   Label Switched Protocol Pings on Label Switched Paths.  A proxy ping
   request is sent to any Label Switching Routers 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 leaf to leaf/
   root tracing.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 06, 2014.

Copyright Notice

   Copyright (c) 2013 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

Swallow, et al.         Expires January 06, 2014                [Page 1]
Internet-Draft               Proxy LSP Ping                    July 2013

   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.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
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   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Proxy Ping Overview . . . . . . . . . . . . . . . . . . . . .   4
   3.  Proxy MPLS Echo Request / Reply Procedures  . . . . . . . . .   6
     3.1.  Procedures for the initiator  . . . . . . . . . . . . . .   6
     3.2.  Procedures for the proxy LSR  . . . . . . . . . . . . . .   7
       3.2.1.  Proxy LSR Handling when it is Egress for FEC  . . . .   9
       3.2.2.  Downstream Detailed/Downstream Maps in Proxy Reply  .  10
       3.2.3.  Sending an MPLS proxy ping reply  . . . . . . . . . .  10
       3.2.4.  Sending the MPLS echo requests  . . . . . . . . . . .  10
         3.2.4.1.  Forming the base MPLS echo request  . . . . . . .  11
         3.2.4.2.  Per interface sending procedures  . . . . . . . .  12
   4.  Proxy Ping Request / Reply Messages . . . . . . . . . . . . .  12
     4.1.  Proxy Ping Request / Reply Message formats  . . . . . . .  12
     4.2.  Proxy Ping Request Message contents . . . . . . . . . . .  13
     4.3.  Proxy Ping Reply Message Contents . . . . . . . . . . . .  14
   5.  TLV formats . . . . . . . . . . . . . . . . . . . . . . . . .  14
     5.1.  Proxy Echo Parameters TLV . . . . . . . . . . . . . . . .  14
       5.1.1.  Next Hop sub-TLV  . . . . . . . . . . . . . . . . . .  18
     5.2.  Reply-to Address TLV  . . . . . . . . . . . . . . . . . .  19
     5.3.  Upstream Neighbor Address TLV . . . . . . . . . . . . . .  19
     5.4.  Downstream Neighbor Address TLV . . . . . . . . . . . . .  20
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  21
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  22