Proxy MPLS Echo Request
draft-ietf-mpls-proxy-lsp-ping-04

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Network Working Group                                         G. Swallow
Internet-Draft                                                    V. Lim
Intended status: Standards Track                           Cisco Systems
Expires: August 30, 2015                                       S. Aldrin
                                                     Huawei Technologies
                                                       February 26, 2015

                        Proxy MPLS Echo Request
                   draft-ietf-mpls-proxy-lsp-ping-04

Abstract

   This document defines a means of remotely initiating Multiprotocol
   Label Switched Protocol 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 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
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   Drafts.

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   This Internet-Draft will expire on August 30, 2015.

 

Swallow, et al.         Expires August 30, 2015                 [Page 1]
Internet-Draft               Proxy LSP Ping            February 26, 2015

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
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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 . . . . . . . . . . . . . . .  8
       3.2.1.  Proxy LSR Handling when it is egress for FEC . . . . . 10
       3.2.2.  Downstream Detailed/Downstream Maps in Proxy Reply . . 11
       3.2.3.  Sending an MPLS Proxy Ping Reply . . . . . . . . . . . 12
       3.2.4.  Sending the MPLS Echo Requests . . . . . . . . . . . . 12
         3.2.4.1.  Forming the base MPLS Echo Request . . . . . . . . 12
         3.2.4.2.  Per interface sending procedures . . . . . . . . . 14
   4.  Proxy Ping Request / Reply Messages  . . . . . . . . . . . . . 14
     4.1.  Proxy Ping Request / Reply Message formats . . . . . . . . 14
     4.2.  Proxy Ping Request Message contents  . . . . . . . . . . . 14
     4.3.  Proxy Ping Reply Message Contents  . . . . . . . . . . . . 15
   5.  TLV formats  . . . . . . . . . . . . . . . . . . . . . . . . . 15
     5.1.  Proxy Echo Parameters TLV  . . . . . . . . . . . . . . . . 15
       5.1.1.  Next Hop sub-TLV . . . . . . . . . . . . . . . . . . . 19
     5.2.  Reply-to Address TLV . . . . . . . . . . . . . . . . . . . 20
     5.3.  Upstream Neighbor Address TLV  . . . . . . . . . . . . . . 20
     5.4.  Downstream Neighbor Address TLV  . . . . . . . . . . . . . 21
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 22
   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 22
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 22
     8.1.  Proxy Echo Parameters Sub-TLVs . . . . . . . . . . . . . . 23