Post on 12-Jan-2016
description
Key Network Architecture Enablers for Wavelength-on-Demand and L1VPN Services
Chris Liou, InfineraVijay Vusirikala, Infinera
Infinera Confidential and Proprietary | 2
Outline
Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications
Key Application Requirements
Architectural Considerations
A Digital Optical Networking Approach
Infinera Confidential and Proprietary | 3
Outline
Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications
Key Application Requirements
Architectural Considerations
A Digital Optical Networking Approach
Infinera Confidential and Proprietary | 4
What is a L1VPN?
A Layer 1 network abstraction that presents a secure, dedicated transport network to the end customer An alternative to a dedicated physical Layer1 network May co-exist with other L1VPN instances on the same physical
carrier network
Provides end-customer with control & visibility over Layer 1 services between Customer Edges (CEs) Comprised of a set of CEs & the VPN connections provided by the
provider (between Provider Edges (PEs)) Varied levels of network management control & visibility
Standards efforts in progress (IETF, ITU-T) GMPLS playing a key role in signaling & routing E.g., draft-ietf-l1vpn-*, ITU-T SG13
Infinera Confidential and Proprietary | 5
L1VPN Example
Multiple dynamically reconfigurable L1VPNs can co-exist on single carrier network
Enables secure, self-configurable & viewable sub-network Streamlines customization of dedicated customer virtual
network
1
1
1
22
CNMSystem
CNMSystem
Customer 1 Customer 2
GMPLS
Infinera Confidential and Proprietary | 6
L1VPN & Dynamic WoD Drivers
Basis for new service offerings for wholesale carriers An alternative to leased point-to-point waves Rapid reconfigurability of L1 services with minimal carrier intervention Shifts onus of capacity planning away from carrier and into customer’s own
hands
Facilitates internal carrier partitioning of common L1 network Streamline carrier’s servicing of internal capacity requests E.g., wholesale carrier providing IP organization with self-configurable L1
transport VPN
Dynamic real-time reconfigurability enables many applications Dynamic load-sharing based on capacity-on-demand One-time high bandwidth broadcast events Timesharing of network capacity Short-term capacity lease
Infinera Confidential and Proprietary | 7
Outline
Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications
Key Application Requirements
Architectural Considerations
A Digital Optical Networking Approach
Infinera Confidential and Proprietary | 8
Key Elements of L1 VPNs
Data Plane • Scalable transport & bandwidth management• Multi-service support• Protection and restoration
Control Plane - GMPLS/ASON• Topology discovery• Route computation• Service provisioning and restoration
Management Plane • End-to-end VPN visualization (CNM) & administration• FCAPS• Network planning
Infinera Confidential and Proprietary | 9
Key Elements of L1VPNsData Plane Considerations
Service transparency Zero modifications to wave service
Flexible service mix/options for customer Multi-rate, multi-protocol
Flexible delivery options for carrier Efficient network & resource utilization Future-proof for future higher-speed services (40G, 100GE)
Any-to-any capacity delivery Carrier-controlled restrictions on data path Customer options for path diversity
Security Misconnection detection & avoidance Isolation between multiple L1VPNs
Data path protection & restoration Options for protection from network failures Layer 1 preemption capability
Infinera Confidential and Proprietary | 10
Key Elements of L1VPNsControl Plane Considerations
On-demand “touchless” reconfigurability Intelligent control plane for streamlined, automated
routing & provisioning Minimal OpEx & lead-times
Evolution path towards dynamic UNI signaling (CE-PE)
Secure & isolated control plane functions Zero interaction between multiple VPNs
Data & Control Plane separation Data plane unaffected by control plane failures
Customer traffic engineering options for route diversity
Infinera Confidential and Proprietary | 11
Key Elements of L1VPNsManagement Plane Considerations
Customer Network Management (CNM) Customer-specific management views of topology, capacity, traffic,
services Automated synchronization with VPN topology
Carrier management of L1VPNs Bi-directional APIs for advanced service management applications
E.g., policy control Ease of administration
L1VPN configuration management Reconfigurability for future L1VPN needs (e.g., higher capacity
between sites) Appropriate hooks for policy management integration
Ease of troubleshooting
Infinera Confidential and Proprietary | 12
L1VPN Abstraction
Car
rier
Net
wor
kC
usto
mer
Net
wor
k
Carrier EMS/NMS
Customer Network Management view
20G
20
G
30G
40G
30
G
CNM view provides L1VPN abstraction Dedicated capacity provisioned
between customer sites End-to-end abstraction excludes
intermediate NE’s
Benefits of L1 VPN control without deploying full WDM network Customer nodal sites dynamically
manage bandwidth Leverage carrier field operations
Varying degrees of data & control plane isolation Overlay vs shared GMPLS model Dedicated vs shared switching
Infinera Confidential and Proprietary | 13
Outline
Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications
Key Application Requirements
Architectural Considerations
A Digital Optical Networking Approach
Infinera Confidential and Proprietary | 14
L1VPN Service Model OptionsDiscussion
Pre-established vs. On-demand PE-PE capacity PE-PE cross-sectional capacity needs may evolve over
time On-demand link sizing encourages sharing of capacity
across multiple customers
Shared vs. dedicated per-VPN switching L1 switching function for each VPN can reside “on” or
“off-net” Off-net switching creates natural security partition
Infinera Confidential and Proprietary | 15
L1VPN Service Model Options (contd.)Discussion
Management vs. Signaling based provisioning Specifies how dynamic circuit configuration is accomplished Signaling based model generally more broadly discussed
Overlay vs. Peering signaling model (CE-PE) Signaling only vs. Signaling + Routing model (aka, Basic vs
Enhanced Mode– Routing enables automated membership & TE link information
exchange
Virtual Node vs. Virtual Link model Differing abstraction levels of L1VPN capacity Virtual Link is currently finding favor
Infinera Confidential and Proprietary | 16
L1VPN Service Level Requirements Discussion
Accounting Reporting Security of provider-customer communication
Data-, control-, and management planes Data integrity, confidentiality, authentication, and
access control
Class of Service (e.g., Availability Class) Performance Reporting Fault Reporting Connectivity Reporting Policy (e.g., path computation policy, CE-CE
signaling pass-through, etc.)
Infinera Confidential and Proprietary | 17
Optical Architecture Options for L1VPNs
ODXC
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Local Add/Drop
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Local Add/Drop
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ROADM/WSS Digital Optical Networking
Optical Digital Cross-Connect (ODXC)
Integrated switching + WDM
Digital sub- ODUk switch
Add/drop, switch, groom 100% of line capacity
Client optics only for local add/drop
All-optical wavelength switching
No wavelength conversion
No sub- switch, mux and grooming without separate OEO
Transponders only for local add/drop
Separate switching + WDM
Digital sub- switch: ODUk or STS-1/VC-4
OEO conversion of 100% of WDM traffic
Add/drop, switch, groom 100% of line capacity
Local Add/Drop
Infinera Confidential and Proprietary | 18
Outline
Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications
Key Application Requirements
Architectural Considerations
A Digital Optical Networking Approach
Infinera Confidential and Proprietary | 19
Digital Optical NetworkingFull Reconfigurability at Every Node
Use (analog) photonics for what it does best: WDM transmission
Use (digital) electronics for everything else
Digital add/drop, switching, grooming, PM and protection…
…at every node
Unconstrained digital add/drop
Any service at any node
End-end service delivery independent of physical path
Robust digital PM and protection
Digital OAMP & managementIntegrated P
hotonics
Integrated Photonics
• Sub- add/drop • Digital switching• Signal regeneration• PM & Error correction• Digital Protection• Digital OAMP
Digital Electronics& Software
Truly unconstrained reconfigurable optical networking
Infinera Confidential and Proprietary | 20
100 Gb/s Transmit
100 Gb/s Receive
So why hasn’t Digital Networking been implemented?Because OEO’s are expensive! Discrete Optics
Single WDM channel - - - - - - - - - - - - - - - - times 32, 40 or 80 wavelengths
Infinera Confidential and Proprietary | 21
100 Gb/s Transmit
100 Gb/s Receive
100 Gb/s Transmit
100 Gb/s Receive
Infinera’s Photonic Integrated Circuit Innovation
5mm
Direct Benefits Size, power, cost, reliability
Strategic Benefits Low-cost OEO conversion allows a Digital Optical
Network paradigm
Infinera Confidential and Proprietary | 22
Benefits of Electronics in Optical Networks
Reach Improvement- G.709 standard defines 6dB gain FEC (Reed-Solomon)
- High-gain FEC provides optical gain of 8dB to 9dB
- Corrects BER of 10-3 to BER of 10-17
Dispersion Compensation- FFE and DFE can compensate upwards of 1000ps/nm
- MLSE can correct upwards of 3000ps/nm dispersion
- Significant space savings vs. DCF
PM and Operations- OTH and SONET/SDH Overhead- Extensive digital PM at all OEO nodes
- J0/B1, BIP-8- FEC bit error rate monitoring- Communication channels for OAM&P
- SONET/SDH DCC and OTH TCM
Reconfigurable Switching- Wide choice of switching/grooming
granularity (VC-4, ODU-1, packet)- Fundamental to managing and
grooming customer services - Highest level of reconfigurability
Infinera Confidential and Proprietary | 23
Evolving to OTN Bandwidth Management
OC48/STM-16
OC192/STM-64
DS1/3 & E1/3
OC3/STM-1
OC12/STM-4
OC48/STM-16STS-1/VC-4 switching
SONET/SDH Networking
Optical/Wavelength Networking
O-E
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1 …N 1 …N
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Digital sub- bandwidth management End-end digital OAMP & PMs Robust digital protection End-end service management
Multi-service support Transparent service transport WDM scalability and reach
n
. . . . .
GbE
10 GbE LAN PHY
OC48/STM-16
ODU1 (2.5G) switching
OCh (DWDM) at 11.1 Gb/s
OC192/STM-64
OTU1/OTU2
Digital sub- bandwidth management End-end digital OAMP & PMs Robust digital protection End-end service management
Multi-service support Transparent service transport WDM scalability and reach
(R)OADM switching
OTN Networking
Infinera Confidential and Proprietary | 24
Integrated Sub- Bandwidth Management
Conventional WDM Networks Separate WDM & OTN layers Sub- grooming only with
ODXC Manual grooming complexity or
extra cost for ODXC
Digital Optical Network - OTN Integrated WDM and OTN
bandwidth management Sub- grooming at every node End-end service management,
PM and OAM
Integrated end-end OTN digital optical networking at every node
OXC
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ODU1 bandwidth management
OTUk services
Infinera Confidential and Proprietary | 25
Digital Optical Network - Characteristics
100G digital bandwidth increments Readily deployable capacity usable by any service
Rapid service deployment Service activation is decoupled from transmission layer design and
constraints Enables efficient protection and restoration schemes Integrated sub-wavelength bandwidth management Automated GMPLS end-to-end service activation Built-in PRBS testing for service readiness
Digital Optical Networking approach provides future-proofing for 40G & 100GbE
Ease of reconfigurability at data plane, control plane and management plane
Infinera Confidential and Proprietary | 26
Dynamically Reconfigurable BandwidthGMPLS UNI
Applications of dynamically reconfigurable bandwidth Dynamic IP load balancing between routers Multiple circuits to time-share same bandwidth (“Time of day” services)
Digital Optical Networking unlocks full value of GMPLS UNI 100G+ service-ready capacity on each link Agnostic to transmission constraints 2.5G switching granularity
Router A
Router B
Router C
Router D
A
B
C
DGMPLS
UNI
Optical LSP Request
Dynamically allocatable IP capacityBaseline IP layer connectivity
IP Virtual Network Topology
Infinera Confidential and Proprietary | 27
Super- Next-gen Services
PIC enabled Digital Optical Networks provide scalable DWDM line capacity to accommodate higher speed services (e.g., 100G)
As IP Link sizes exceed optical line rate, IP core requires “Super-” services
<100G>
100G
Layer 3/2Router
Layer 1/0DWDM
Fiber
Pac
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100
GbE
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uit
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SR
100
GbE
SR
Infinera Confidential and Proprietary | 28
L1VPN Evolution
L1 VPNs should scale in two dimensions to accommodate future evolution L1VPN Size and Traffic growth
Control plane and management plane to scale accordingly
Ease of reconfigurability of both logical circuits & cross-connect capacity needs to be maintained
New Services Today most L1VPN designs want 1G-10G … with path to 40G & 100GbE services
Infinera Confidential and Proprietary | 29
Summary
L1VPN architecture involves data plane, control plane and management plane
Key Characteristics of L1VPNs Scalability Ease of reconfigurability Customized control
Digital Optical Networking Architecture provides key benefits for L1VPNs Service layer decoupled from transmission layer Integrated sub-lambda bandwidth management End-to-end GMPLS intelligence