Optical Data Networking.ppt
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Optical Data Networking.ppt Optical Data Networking.ppt Presentation Transcript

  • Optical Data Networking: “IP over X” Antonio Rodríguez Moral* & Paul Bonenfant Lucent Technologies – Broadband Networks Group * [email_address] Globecom’99 5 – 9 December 1999 Rio de Janeiro, Brazil
  • “IP over WDM” Demystified Implementation Reality
    • “ Optical Internetworking”?
      • Really is SDH Internetworking
      • Implies single evolution for data transport
      • “ Networking”: Service layer networking through SDH/WDM pipes
      • SDH dependency limits technological innovation (e.g., Packet over Fiber, GbE and 10xGbE over DWDM evolution)
      • Not taking advantage of networking capability at the Optical layer
    • A STEP AWAY from the original vision of Optical Networking...
    SDH-Based WDM Terminal SDH-Based WDM Terminal IP over SDH STM-16c IP over SDH STM-16c Multiple SDH STM-16 Wavelengths
  • Enter “Digital Wrappers”
    • Wavelength Digital Wrappers are a step toward the original vision of Optical Networking
    • Digital Wrappers enable “virtual transparency”
      • Releases the Optical Network from SONET/SDH dependency
      • Allows for end-to-end Optical Transport Networking solutions
    Optical Channel (Wavelength) Digital Wrapper OCh OAM OCh Payload FEC Data SONET/SDH FDDI ATM PDH GbE, 10xGbE SDL IP
  • What is “IP over WDM”? Take Your Pick...
    • What is “IP over DWDM” (really)?
    • In an increasingly competitive world, Service Providers have to differentiate themselves.
    • Optical Data Networking solutions should be able to accommodate each Service Provider’s unique data networking vision...
    IP PPP/HDLC SONET/SDH IP ATM SONET/SDH WDM WDM IP ATM WDM IP SONET/SDH WDM IP Standard ATM Mapping POS Mapping ATM Vision Robust Packet over SONET Robust Packet over Fiber IP 1/10xGbE MAC GbE Vision PHY WDM 1/10xGbE PHY SDL PHY SDL WDM
  • Does a “Total Solution” Exist ??
    • A total solution for what problem?
    • And is it really ONE single solution, or a set of solutions?
    • The problem: Optical Data Networks: optical networks that are optimized for data traffic (let’s say IP traffic ) and applications
    • Four dimensions pop up already:
      • what network segment?
      • what optimization?
      • what IP traffic?
      • what user and network applications?
    • And some other dimensions must be considered:
      • Greenfield vs. Incumbent
      • IP-only vs. Multi-service platform
    • So, the problem is a multi-dimensional problem, with at least 6 dimensions to consider.
    • A quick, common sense statement:
    • THERE EXISTS NO SINGLE SOLUTION THAT OPTIMIZES THE PROBLEM UNDER ALL POSSIBLE VARIABLES...
  • ...to a Multi-Dimensional Problem! Enterprise Access Metro/Regional Core Network Segment Evolution End Application Hard QoS Soft QoS Best Effort Voice+Video VPN Web browsing Flows Packets Circuits Traffic Mix
  • Optical Internetworking vs. Optical Data Networking
    • Optical Internetworking is today’s “IP over WDM”:
      • “ Optical”: Optical layer provides point-to-point transport (DWDM)
      • “ Internetworking”: IP layer provides networking
    • Optical/Data Networking is a more powerful networking solution:
      • Networking at both the transport (optical) and service (data) layers
      • Optical networking supports:
        • Diversity in data networking protocols and architectures
        • Flexibility and robustness via wavelength (Optical Channel) routing, protection, and restoration
      • Essential for open, giga/tera-bit, carrier-class Optical Data Networks optimized for network segments/applications
        • Allows tailored solutions specific to each network segment, and to each Service Provider
  • Views of the “Total Solution(s)” Optical Data Networking
    • Gaining Multi-Vendor Compliance
      • Standards, Standards, Standards...
    • Survivability Schemes
      • Service Layer / Transport Layer will both apply, and continue to co-exist
    • Integrating Legacy and Optical Networks
      • Revolutionary technologies (DWDM, OAs, Digital Wrappers) have enabled an evolution in networking (Optical Networking)
    • Optical Network Deployment (let’s be honest...)
      • Optical Networking solutions will be deployed where economical to the Service Provider
      • Optical Networking solutions must meet price targets of existing/alternative technologies, or offer solutions to problems for which there is no alternative
    • Management Systems to Guarantee QoS
      • “ Single-seat” distributed operations platforms, or bust
    • The Future is about a Network of Networks – Some Common Sense (worth repeating):
      • THERE EXISTS NO SINGLE SOLUTION...