Signaling Extensions for Wavelength Switched Networks - IETF Tools by hcj


									             Framework for Black Link
             Management and Control


              Ruediger Kunze             Deutsche Telekom

March 2011                     80th IETF Prague             1
                           BL Introduction

                                  Black- link (vendor A)

                                       Optical path
          Tx     k                                              k      Rx
                             OM        (incl. e.g. OAs,    OD
       (vendorX)                          OADMs)                      (vendorY)
                      SS                                        RS

Black Link: The Black Link approach [ITU-T G.698.2] allows supporting an optical
transmitter/receiver pair of one or different vendors to inject a DWDM channel
and run it over an optical network composed of amplifiers, filters, add-drop
multiplexers from a different vendor. Therefore the standard defines the ingress
and egress parameters at the interface Ss and Rs.
• Black Link (BL) as specified by ITU-T offers carriers an
  additional option to deploy optical interfaces in a WDM
    – BL is currently defined for 2,5G and 10G and will be extended by ITU-
      T for 40G,100G and beyond
• The approach offers some benefits but has also some
  challenges regarding the operation of the network
    – Today it is state-of-the-art to interconnect IP Routers from different
      vendors and WDM transport systems using short-reach, grey
    – To ensure applicability as in state-of-the-art networks, the BL
      approach must support a multi-vendor environment
    – The traditional approach operating carrier networks today is based
      on a separation of transport and packet, means different
      departments with different tools operate and manage network and
• Initial requirements discussed on the draft
    – Interoperable BL solutions
    – Manageability based on the Status-Quo today
          Document Scope
• Focus on solutions for management and
  control of the optical interfaces:
  – BL operation scenarios/ uses cases
  – Black Link Control and Management Solutions
  – Requirements for BL and FW deployments (could
    be further discussed in a separate document)
• WSON is complementary
  – Focusing on the management and control
    of the optical interface.
  – Dynamic Wavelength switching and
    assignment is out of scope
       Solution initially in scope.

 NMS IP                             NMS OD                                   NMS IP

                            EMS          EMS               EMS

                                  Black- link (vendor A)

  Terminal # 1                                                          Terminal # 2

                                       Optical path
           Tx     k                                              k      Rx
                             OM        (incl. e.g. OAs,    OD
        (vendorX)                         OADMs)                       (vendorY)
                       SS                                        RS

EMS – Element Management System
NMS – Network Management System
         Key Requirements
• Interoperable BL solutions
• Specification of solutions ensuring an
  interoperable management of BL deployments
  for 10G, 40G and beyond.
• Must work with legacy equipment and
  management components.
                Next Steps
• Requesting Working Group feedback
• Progressing work on Use Case section and on
• Extend solution section if there are further
  approaches …
• Feedback from other operators invited
• Corresponding MIB document available

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