Download Routing Technology Group IP/MPLS Edge Positioning **Draft

Optical Networking:
From Photons to Packets
Rajiv Ramaswami
VP/GM Optical Technology Group
7575_03_2003
© 2003, Cisco Systems, Inc. All rights reserved.
1
Optical Post Bubble
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© 2003, Cisco Systems, Inc. All rights reserved.
2
Outline
• Network evolution
• Where are core networks headed?
• Where are metro/access networks headed?
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Networks in Transition
Today: Service Specific Networks
Narrowband
Access
Network
Broadband Access
Network
Radio
Access
Network
Voice Network
(Circuit)
TDM Network
(Circuit)
FR/ATM Network
(Packet)
Challenges:
•
Capex
•
Opex
•
Service Velocity
Public IP Network
(Packet)
SONET/SDH
Access
Network
High Speed (Ethernet)
Access Network
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Private IP/MPLS Network
(Packet)
Optical Network
(Circuit)
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Networks in Transition
Future: One Network, Many Services
Broadband Access
Network
TDM Network
(Circuit)
Public
Radio
Access
Network
2.5G/3G/4G/WLAN
IP/MPLS Network
SONET/SDH
Access Network
Private
High Speed (Ethernet)
Access Network
Optical Network
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Access and core Networking:
End-End Data Delivery
SONET/SDH
Loop
Access
Network
Ethernet
/ EoMPLS
CoreCore
Network
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CO
IP/MPLS
NG SONET
•
•
•
•
Service End Point
(Customer, Enterprise, SMB)
Service End Point
(Customer, Enterprise, SMB)
CO
SONET/SDH
Loop
Access
Network
WDM
NG SONET
Core networks: IP+WDM
Access Networks: NG SONET/SDH with packet integration
Boundaries between packet and optical blurring
Consistent interworking across optical and packet layers
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Optical in the Network Core
Router
Router
Router
Reconfigurable optical WDM layer with optical bypass
O/E/O minimized---capex/opex reduction
Switching for automated connection provisioning
SONET-like look and feel
Direct connections between routers
SONET largely irrelevant
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Integration between IP and Optical In the Core
End-to-end optical layer onto
which TDM, IP &
wavelength services
converge
1.
Colored tunable interfaces
directly on the router
2.
A switched optical
convergence layer
3.
Integrated management
4.
Integrated control plane
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Unified Management
Router
Optical Layer
Unified Control Plane
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Legacy DWDM Systems:
Manual DWDM Network Life-Cycle
Manual provisioning of
optical design parameters
Complicated
Network Planning
Manual provisioning of equipment
& topology into EMS/NMS
Labor-intensive
operation
Manual installation, manual power measurements and
VOA tweaking at every site for every wavelength
Manual DWDM processes: labor intensive and error prone
Result: high OpEx costs
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Next Gen Optical Layer
Automated DWDM Network Life-Cycle
Automated provisioning
of all parameters
Easy changes to design
based on actual fiber plant
Easy planning
with
sophisticated tool
EMS/NMS learns from the network
and stays in sync
Automated end-toend lightpath setup
Automated optical layer for
end-to-end connection setup;
Manual patching of client at
end-points only
Simplified, graphical A-Z
lightpath provisioning &
trouble shooting
Automated DWDM: simplified TDM-like installation and on-going operation
Result: Reduces OpEx, facilitates wide deployment
7575_03_2003
© 2003, Cisco Systems, Inc. All rights reserved.
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Next Gen Optical Layer
Enabling Technologies
Planning &
simulation tool
Easy planning
with
sophisticated tool
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Auto
Node
Setup
ROADM
Auto
Power
Control
Automated optical layer for
end-to-end connection setup;
Manual patching of client at
end-points only
© 2003, Cisco Systems, Inc. All rights reserved.
Sophisticated
EMS
Simplified, graphical A-Z
lightpath provisioning &
trouble shooting via CTM
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Metro/Access Network Evolution:
Services and Transport technologies
Data
Services: Voice
Data
10/100
GE
10GE
Transport:
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SONET/
SDH
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DS-1/3
Storage
FC
E1/3
ESCON
Voice
OC-n
STM-n
NG SONET/SDH
RPR
MPLS
DWDM/CWDM
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Delivering Data Services
Option A: Overbuild for New Services
Access Rings
Office
Interoffice Rings
PoP
New build versus … integrate data into TDM infrastructure
Access Rings
Office
Interoffice Rings
PoP
Option B: Integrate New Services onto NG SONET
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Today’s Network:
Transport is not aware of service layer
Hub office / PoP
End office
ADM
Customer A
DS0
Router
DS1
DS3
DS1
Customer B
DS0
DS1
DS3 (TDM container)
DS1
Customer C
Chan
10G
CrossConnect
ADM
Customer D
DS0
DS1
DS3
DS1
Customer E
DS0
Customer F
DS1
DS1
DS3 (TDM container)
Chan
10G
Low utilization from Customer site is carried all the way to the POP
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Tomorrow’s Network:
Service aware transport
Hub office
End office
MSA
Customer A
Nonchan
1GE
Customer B
Customer C
MPLS Pseudowire
MSA
Customer D
Customer E
Customer F
MPLS Pseudowire
MultiService
Edge
Router
MultiService
Access
Nonchan
1GE
Packet aggregation at each stage improves utilization & density by 10x
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Summary
Yesterday
Tomorrow
• Optical and IP separate
• Ethernet/MPLS into
optical
• WDM into routers
• NG SONET with L1
Ethernet
• Manually intensive WDM
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• NG SONET with L2
Ethernet, SAN, RPR,
WDM
• Plug and play,
reconfigurable WDM
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