five essential elements for future regional optical networks
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Five Essential Elements for Future Regional Optical Networks. Harold Snow Sr. Systems Architect, CTO Group. Agenda. Five Essential Elements – Harold Snow, Meriton Networks Reconfigurability Pay as You Grow Scalability Aggregation and Sub-Wavelength Switching Multi-Degree Operation - PowerPoint PPT PresentationTRANSCRIPT
Five Essential Elements for Future Regional Optical Networks
Harold SnowSr. Systems Architect, CTO Group
Confidential2
Agenda
Five Essential Elements – Harold Snow, Meriton Networks Reconfigurability Pay as You Grow Scalability Aggregation and Sub-Wavelength Switching Multi-Degree Operation Automated Network Planning and
Management Systems
Internet2 Network Discussion – Christian Todorov, Internet2
Q & A
Confidential3
The Transition to 21st Century Transport Networking
20th Century
Fundamentally changing the value model of the transport infrastructure
Switching of connections (Subrate λ paths and full λ paths)
Transmission of bits
Closed OADM ring
Separation of Ethernet Aggregation layer and Optical domain
Multi-ring access and multi-degree switching
Convergence of the Ethernet-Optical layer
21st Century
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Reconfigurability
R&E Network environment presents unique challenges: Permanent Circuits
Dynamic Circuits Years, Months, Weeks, …
End-to-End circuits, and/or attachment to intermediate Routers
GigE, 10GigE, 40Gbps, 100Gbps, …
Mostly, it’s about creating Ethernet paths through the optical network
Need circuit connectivity that is: Cost Effective across capacity range
Agile
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Optical Reconfigurability
SiteN
Site1
Site3
Site5
Site7
D
C
B
BA
A
D
C
C-C Initially between Site 3 and Site 5
Change Circuit to go between Site 3 and Site 7
Wavelength Selective Switch (WSS) facilitates switching in Optical Domain
• Requires transponder equipment at endpoints only
• All other nodes unchanged
• Saves Cost
• Saves Churn
Site2
Site4
Site6
C
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Pay as You Grow Scalability:“Spot” Upgrades
A-A Initially at 10Gbps Upgrade to 40Gbps
C-C Initially at 1 x 10GbpsUpgrade to 2 x 10Gbps
B-B
Add New Circuit
• WSS Optical Switching requires equipment changes at endpoints only
• All other nodes unchanged
• Saves Cost, Churn
• Capacity is added where it is needed, when it is needed…
SiteN
Site1
Site3
Site5
Site7
D
C
B
B
A
A
D
C
Site2
Site4
Site6
The overall capacity of the ring has been increased
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Network Efficiency: Sub-Wavelength Aggregation
ADM-on-a-Wavelength Transponders incorporate standards compliant ADM functionality on a pair of line-cards
Effective utilization of every wavelength (per wavelength, VC3/STS-1 level grooming)
Add/Drop or optically bypass any aggregation wavelength at any node
Dramatic Reduction in the amount of equipment
Sub-s are “Virtual Wavelengths” for lower-rate circuits (GigE) 9 x Full GigE per 10G
ADM terminal is replaced by a pair of E-W transponders
ADM ring becomes a wavelength in the WDM ring
Stacked ADM Rings
e.g. 40 boxes 4
10 NEs/ site
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Beyond Two Degrees Example: Multiple Rings
A B
A
C
C
A
B
How to do this effectively while retaining values of:
• Dynamic Reconfigurability
• Non-Blocking
• “Virtual Lambda” efficiencies
10G
1G
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Multi-Degree Operation
Wavelength and Sub-Wavelength Switch
• Multi-degree OEO switching and Optical Switching functionality integrated on one platform
• Non-blocking switching of Full- Wavelengths and Sub- “Virtual Wavelengths” between fiber degrees
• Not limited to 4 Degrees
• Enables Layer Optical Mesh…
&
Sub-Switch
Op
tic
al
Op
tic
al
&
Sub-Switch
Op
tic
al
Op
tic
al
&
Sub-Switch
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A Flexible Optical Layer
On Demand Ethernet Optical Paths through the Transport Layer Via IP/MPLS Layer
Flexibility Direct end-to-end
Low latency & low jitter
Predictable QoS
Off-load Routers
End-to-End path management of individual GigE optical paths
IP/MPLS
Agile Optical Layer
Real-timeComputing
Center
Ethernet
10GigE
GigEs
10GigE
PublicInternet
Universities, Labs, etc.
General BatchComputing& Storage
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Looking Forward…
Most if not all of the network traffic will become Ethernet based
Can we leverage some flexibility and cost advantages by aggregating and sub- switching at the Ethernet layer?
Use Ethernet as a “Tunnel Support” protocol Creates “circuit orientated” end to end Ethernet tunnels
Single service facilitation methodology for service delivery
Precedent set with IP core networks where MPLS is used
Range of standards based Tunnel methodologies under discussion in ITU Transport Study Group PBB-TE
T-MPLS
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Vision:Converged Ethernet Optical Network
WavelengthSwitching
Sub- Wavelength Switching
EthernetTunnel
Switching
C/DWDM fiber pairs Grey interfaces: GigE/10GigE, STM-n/OC-n
From anyport, wavelength, or Ethernet tunnel
To any otherport, wavelength, or Ethernet tunnel.
Multi-degreewavelength transport
and switchingvia OEO and WSS
Layer 1-based Ethernet
Sub Wavelength Switching
Layer 2 Ethernet
Switching++ … in a single carrier-class platform
Integrated Service Switching for Future R&E Networks
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Automated Network Planning System
Optical layer designGUI based interface
Auto-insert nodes & spans
Calculate OSNR, nonlinearities & dispersion penalties
Allocate equipment
Traffic planningInput services via drag and dropCalculate most efficient use of
wavelengths and capacity Minimize cost and/or resource
usageImport/Export capability
Design Networks in Minutes
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Network Management System
1. Simplify Routine Functions Integrated with network and element management functions
Point-and-click Lightpath provisioning Operator-Selected Routing and . . .
Automatic Lightpath Routing
End-to-end lightpath protection Non-disruptive Live Routing Changes
2. Reduce Errors Auto-discovery of equipment, topology,
and connections
Automatically detect fiber cabling errors
3. Provide Advanced, Time-Saving Features Performance management
Remote loop-back management
Single view for all equipment
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Summary
Reconfigurability Any Circuit, Anywhere, On Demand…
Pay as you Grow Scalability Incur cost and churn only When and Where it is required Future-proof for Higher Capacities
Network Efficiency Effective use of capacity for lower rate (Sub-Wavelength) circuits
Multi-Degree Operation Non-Blocking operation for > 2 Degrees Support for Sub-Wavelength circuits
Network Planning and Management Simplified Creation and Operation of the Network Optically Engineered for future lambda rates Point-and-Click GUI
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Christian Todorov, Internet2
Confidential17
Questions?Thank You