MPLS LSP PW status refresh reduction for Static Pseudowires
draft-ietf-pals-status-reduction-04

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Last updated 2017-04-13 (latest revision 2017-03-08)
Replaces draft-ietf-pwe3-status-reduction
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Internet Engineering Task Force                             Luca Martini
Internet Draft                                               Monoski LLC
Intended status: Standards Track                          George Swallow
Expires: September 2017                                            Cisco
                                                        Elisa Bellagamba
                                                                Ericsson

                                                              March 2017

      MPLS LSP PW status refresh reduction for Static Pseudowires

                draft-ietf-pals-status-reduction-04.txt

Status of this Memo

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Abstract

   This document describes a method for generating an aggregated
   pseudowire status message transmitted on a Multi-Protocol Label
   Switching (MPLS) Label Switched Path (LSP) to indicate the status of
   one or more pseudowires carried on the LSP.

   The method for transmitting the pseudowire (PW) status information is
   not new, however this protocol extension allows a Service Provider
   (SP) to reliably monitor the individual PW status while not

Martini, et al.                                                 [Page 1]
Internet Draft  draft-ietf-pals-status-reduction-04.txt       March 2017

   overwhelming the network with multiple periodic status messages. This
   is achieved by sending a single cumulative summary status
   verification message for all the PWs grouped in the same LSP.

Table of Contents

    1        Introduction  .........................................   3
    1.1      Requirements Language  ................................   3
    1.2      Terminology  ..........................................   3
    1.3      Notational Conventions in Backus-Naur Form  ...........   4
    2        PW status refresh reduction protocol  .................   4
    2.1      Protocol states  ......................................   4
    2.1.1    INACTIVE  .............................................   5
    2.1.2    STARTUP  ..............................................   5
    2.1.3    ACTIVE  ...............................................   5
    2.2      Timer value change transition procedure  ..............   5
    3        PW status refresh reduction procedure  ................   6
    4        PW status refresh reduction Message Encoding  .........   6
    5        PW status refresh reduction Control Messages  .........  10
    5.1      Notification message  .................................  10
    5.2      PW Configuration Message  .............................  11
    5.2.1    MPLS-TP Tunnel ID  ....................................  12
    5.2.2    PW ID configured List  ................................  13
    5.2.3    PW ID unconfigured List  ..............................  13
    6        PW provisioning verification procedure  ...............  14
    6.0.4    PW ID List advertising and processing  ................  15
    7        Security Considerations  ..............................  15
    8        IANA Considerations  ..................................  15
    8.1      PW Status Refresh Reduction Message Types  ............  15
    8.2      PW Configuration Message Sub-TLVs  ....................  16
    8.3      PW Status Refresh Reduction Notification Codes  .......  16
    8.4      PW status refresh reduction Message Flags  ............  17
    8.5      G-ACH Registry Allocation  ............................  17
    8.6      Guidance for Designated Experts  ......................  17
    9        References  ...........................................  18
    9.1      Normative References  .................................  18
    9.2      Informative References  ...............................  18
   10        Authors' Addresses  ...................................  18

Martini, et al.                                                 [Page 2]
Internet Draft  draft-ietf-pals-status-reduction-04.txt       March 2017
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