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Liaison statement
Reply to LS on OTNT Standardization Work Plan

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State Posted
Submitted Date 2020-08-24
From Groups ccamp, mpls, pce, teas
From Contact Scott Mansfield
To Group ITU-T-SG-15
To Contacts
Cc Martin Vigoureux <>
Loa Andersson <>
Julien Meuric <>
Traffic Engineering Architecture and Signaling Discussion List <>
Fatai Zhang <>
Path Computation Element Discussion List <>
John Drake <>
Scott Mansfield <>
Dhruv Dhody <>
Multiprotocol Label Switching Discussion List <>
Alvaro Retana <>
Deborah Brungard <>
Vishnu Beeram <>
Nicolai Leymann <>
Daniele Ceccarelli <>
Lou Berger <>
Tarek Saad <>
Common Control and Measurement Plane Discussion List <>
Response Contact
Technical Contact
Purpose For information
Thank you for your continued interest in the work of the IETF related to OTNT

 This liaison is in response to SG15-LS245

A list of changes and additions is contained below:

  + In section 4.7.2
     - Delete L2VPN WG
     - Delete PWE3 WG
     - NOTE: L2VPN and PWE3 WGs were replaced by the PALS WG, but the PALS WG
     has mostly concluded its work - Add
         - PCE WG: Protocols to enable a Path Computation Element-based
         architecture - TEAS WG: IP, MPLS, and GMPLS Traffic engineering
         architecture and related control-protocol functions
  + Updates to Table 11 in section 6.4
     - Updates to Internet Drafts
        - Add
           * PCEP Extensions for LSP scheduling with stateful PCE
        - Delete expired draft
           * A framework for Management and Control of DWDM optical interface
        - Delete drafts that are now RFCs
          * PCEP Extension for WSON Routing and Wavelength Assignment (now RFC
          * PCEP extensions for GMPLS (now RFC 8779)
         - Delete replaced Internet Drafts
           * Path Computation Element Communication Protocol (PCEP) Extensions
           for remote-
               initiated GMPLS LSP Setup (merged with PCEP Extension for
               Flexible Grid Networks Internet Draft)
    - Add RFCs
           - RFC 8237
                  * October 2017
                  * MPLS Label Switched Path (LSP) Pseudowire (PW) Status
                  Refresh Reduction for
                     Static PWs
          - RFC 8469
                  * November 2018
                  * Recommendation to Use the Ethernet Control Word
          - RFC8779
                 * July 2020
                 * Path Computation Element Communication Protocol (PCEP)
                 Extensions for GMPLS *
         - RFC8780
                * July 2020
                * The Path Computation Element Communication Protocol (PCEP)
                Extension for
                    Wavelength Switched Optical Network (WSON) Routing and
                    Wavelength Assignment (RWA)

The list of upcoming IETF meetings can be found on the IETF website at

Thank You,
Daniele Ceccarelli (CCAMP Chair), Fatai Zhang (CCAMP Chair), Dhruv Dhody (PCE
Chair), Julien Meuric (PCE Chair), Vishnu Beeram (TEAS Chair), Lou Berger (TEAS
Chair), Loa Andersson (MPLS Chair), Nicolai Leymann (MPLS Chair), Tarek Saad
(MPLS Chair),and Scott Mansfield (IETF’s ITU-T Liaison)