Transcript Optical Data Networking

Optical Data Networking:
“IP over X”
Antonio Rodríguez Moral* & Paul Bonenfant
Lucent Technologies – Broadband Networks Group
*[email protected]
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
• “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...
Antonio Rodríguez Moral & Paul Bonenfant • Globecom’99 • Page 2
Enter “Digital Wrappers”
IP
SONET/SDH FDDI
OCh
OAM
ATM
SDL
OCh Payload
GbE, 10xGbE
PDH
FEC
Data
Optical Channel (Wavelength) Digital Wrapper
• 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
Antonio Rodríguez Moral & Paul Bonenfant • Globecom’99 • Page 3
What is “IP over WDM”?
Take Your Pick...
Standard
ATM Mapping
POS Mapping
ATM Vision
GbE Vision
Robust
Packet over SONET
Robust
Packet over Fiber
IP
IP
IP
IP
IP
IP
ATM
PPP/HDLC
ATM
1/10xGbE MAC
SDL
SDL
SONET/SDH
SONET/SDH
PHY
1/10xGbE PHY
SONET/SDH
PHY
WDM
WDM
WDM
WDM
WDM
WDM
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...
Antonio Rodríguez Moral & Paul Bonenfant • Globecom’99 • Page 4
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 multidimensional 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...
Antonio Rodríguez Moral & Paul Bonenfant • Globecom’99 • Page 5
...to a Multi-Dimensional Problem!
Hard QoS
Enterprise
Soft QoS
Access
Best Effort
Voice+Video
Metro/Regional
Traffic
Mix
VPN
Core
Web browsing
Network
Segment
End
Application
Evolution
Circuits
Packets
Flows
Antonio Rodríguez Moral & Paul Bonenfant • Globecom’99 • Page 6
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
Antonio Rodríguez Moral & Paul Bonenfant • Globecom’99 • Page 7
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...
Antonio Rodríguez Moral & Paul Bonenfant • Globecom’99 • Page 8