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Optical Data Networking: “IP over X” Antonio Rodríguez Moral* & Paul Bonenfant Lucent Technologies – Broadband Networks Group * arodmor@lucent.com. Globecom’99 5 – 9 December 1999 Rio de Janeiro, Brazil. IP over SDH STM-16c. IP over SDH STM-16c. Multiple SDH STM-16 Wavelengths. SDH-Based

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globecom 99 5 9 december 1999 rio de janeiro brazil

Optical Data Networking: “IP over X”Antonio Rodríguez Moral* & Paul BonenfantLucent Technologies – Broadband Networks Group*arodmor@lucent.com

Globecom’99

5 – 9 December 1999

Rio de Janeiro, Brazil

ip over wdm demystified implementation reality

IP over SDH

STM-16c

IP over SDH

STM-16c

Multiple SDH STM-16

Wavelengths

SDH-Based

WDM Terminal

SDH-Based

WDM Terminal

“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...
enter digital wrappers

IP

SONET/SDH

FDDI

ATM

SDL

GbE, 10xGbE

PDH

FECData

OChOAM

OCh Payload

Optical Channel (Wavelength) Digital Wrapper

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
what is ip over wdm take your pick

Standard

ATM Mapping

Robust

Packet over SONET

Robust

Packet over Fiber

POS Mapping

ATM Vision

GbE Vision

IP

IP

IP

IP

IP

IP

ATM

PPP/HDLC

ATM

1/10xGbE MAC

SDL

SDL

SONET/SDH

PHY

SONET/SDH

1/10xGbE PHY

SONET/SDH

PHY

WDM

WDM

WDM

WDM

WDM

WDM

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...
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...

Does a “Total Solution” Exist ??
to a multi dimensional problem
...to a Multi-Dimensional Problem!

Hard QoS

Soft QoS

Enterprise

Access

Best Effort

Voice+Video

Metro/Regional

VPN

Traffic Mix

Core

Web browsing

Network Segment

End Application

Evolution

Circuits

Packets

Flows

optical internetworking vs optical data networking
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
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...