Transcript 20061206-fiveelements-snow

Harold Snow
Sr. Systems Architect,
CTO Group
Five Essential Elements for
Future Regional Optical Networks
Agenda
 Five Essential Elements –
Harold Snow, Meriton Networks
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
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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
Confidential
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The Transition to
21st Century Transport Networking
 21st Century
 20th Century
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Transmission of bits
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Switching of connections
(Subrate λ paths and full λ paths)
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Closed OADM ring
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Multi-ring access and multi-degree
switching

Convergence of the EthernetOptical layer
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Separation of Ethernet
Aggregation layer and
Optical domain
Fundamentally changing the value model
of the transport infrastructure
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Reconfigurability
 R&E Network environment presents unique challenges:
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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:
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Cost Effective across capacity range
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Agile
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Optical Reconfigurability
B
A
Site
2
Site
1
C-C Initially between Site 3 and
Site 5
Site
3
 Change Circuit to go
between Site 3 and Site 7
D
Wavelength Selective Switch
(WSS) facilitates l switching in
Optical Domain
• Requires transponder
equipment at endpoints only
• All other nodes unchanged
• Saves Cost
• Saves Churn
C
Site
4
Site
N
A
Site
5
Site
7
C
Site
6
D
B
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C
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Pay as You Grow Scalability:
“Spot” Upgrades
A-A Initially at 10Gbps
A
 Upgrade to 40Gbps
Site
2
Site
1
C-C Initially at 1 x 10Gbps
B
Site
3
Upgrade to 2 x 10Gbps
B-B
C
 Add New Circuit
D
• 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…
Site
4
Site
N
Site
5
Site
7
D
A
C
Site
6
B
The overall capacity of the ring has been increased
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Network Efficiency:
Sub-Wavelength Aggregation
 4
e.g. 40 boxes
10 NEs/
site
Stacked ADM Rings
ADM terminal is replaced
by a pair of E-W transponders
ADM ring becomes a
wavelength in the WDM ring
ADM-on-a-Wavelength Transponders incorporate standards compliant ADM
functionality on a pair of line-cards
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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-ls are “Virtual Wavelengths” for lower-rate circuits (GigE)  9 x Full GigE per 10G l
Confidential
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Beyond Two Degrees
Example: Multiple Rings
A
B
B
10G
1G
C
A
A
How to do this effectively while
retaining values of:
C
• Dynamic Reconfigurability
• Non-Blocking
• “Virtual Lambda” efficiencies
Confidential
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Optical
l
&
Sub-l
Switch
Optical
Optical
l
&
Sub-l
Switch
Optical
Multi-Degree Operation
l
&
Sub-l
Switch
Wavelength and Sub-Wavelength Switch
• Multi-degree OEO switching and Optical Switching functionality integrated
on one platform
• Non-blocking switching of Full-l Wavelengths and Sub-l “Virtual
Wavelengths” between fiber degrees
• Not limited to 4 Degrees
• Enables Layer Optical Mesh…
Confidential
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A Flexible Optical Layer
General Batch
Computing
& Storage
Public
Internet
Real-time
Computing
Center
 On Demand Ethernet Optical
Paths through the Transport
Layer
IP/MPLS
 Via IP/MPLS Layer
 Flexibility
10GigE
GigEs
Ethernet
10GigE
 Direct end-to-end
 Low latency & low jitter
 Predictable QoS
 Off-load Routers
Agile Optical Layer
Universities,
Labs, etc.
End-to-End path management of individual GigE optical paths
Confidential
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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-l switching at the Ethernet layer?
 Use Ethernet as a “Tunnel Support” protocol
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Creates “circuit orientated” end to end Ethernet tunnels
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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
Confidential
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Vision:
Converged Ethernet Optical Network
Multi-degree
wavelength transport
and switching
via OEO and WSS
+
Layer 1-based
Ethernet
Sub Wavelength
Switching
+
Layer 2
Ethernet
Switching
… in a single carrier-class platform
From any
port, wavelength, or Ethernet
tunnel
Wavelength
Switching
C/DWDM fiber pairs
SubWavelength
Switching
Ethernet
Tunnel
Switching
To any other
port, wavelength, or Ethernet
tunnel.
Grey interfaces: GigE/10GigE, STM-n/OC-n
Integrated Service Switching for Future R&E Networks
Confidential
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Automated Network Planning System
Optical layer design
GUI based interface
Auto-insert nodes & spans
Calculate OSNR,
nonlinearities & dispersion
penalties
Allocate equipment
Traffic planning
Input services via drag and drop
Calculate most efficient use of
wavelengths and capacity
Minimize cost and/or resource
usage
Import/Export capability
Design Networks in Minutes
Confidential
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Network Management System
1. Simplify Routine Functions
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Integrated with network and element management functions
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Point-and-click Lightpath provisioning
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Operator-Selected Routing and . . .
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Automatic Lightpath Routing
End-to-end lightpath protection
Non-disruptive Live Routing Changes
2. Reduce Errors
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Auto-discovery of equipment, topology,
and connections

Automatically detect fiber cabling errors
3. Provide Advanced, Time-Saving Features
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Performance management
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Remote loop-back management
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Single view for all equipment
Confidential
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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
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Simplified Creation and Operation of the Network
Optically Engineered for future lambda rates
Point-and-Click GUI
Confidential
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Christian Todorov, Internet2
Confidential
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Questions?
Thank You
Confidential
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