Key network architecture enablers for wavelength on demand and l1vpn services
This presentation is the property of its rightful owner.
Sponsored Links
1 / 29

Key Network Architecture Enablers for Wavelength-on-Demand and L1VPN Services PowerPoint PPT Presentation


  • 86 Views
  • Uploaded on
  • Presentation posted in: General

Key Network Architecture Enablers for Wavelength-on-Demand and L1VPN Services. Chris Liou, Infinera Vijay Vusirikala, Infinera. Outline. Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications Key Application Requirements Architectural Considerations

Download Presentation

Key Network Architecture Enablers for Wavelength-on-Demand and L1VPN Services

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Key network architecture enablers for wavelength on demand and l1vpn services

Key Network Architecture Enablers for Wavelength-on-Demand and L1VPN Services

Chris Liou, Infinera

Vijay Vusirikala, Infinera


Outline

Outline

  • Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications

  • Key Application Requirements

  • Architectural Considerations

  • A Digital Optical Networking Approach


Outline1

Outline

  • Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications

  • Key Application Requirements

  • Architectural Considerations

  • A Digital Optical Networking Approach


What is a l1vpn

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


L1vpn example

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

Customer 1

Customer 2

CNM

System

1

1

GMPLS

2

2

1


L1vpn dynamic wod drivers

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


Outline2

Outline

  • Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications

  • Key Application Requirements

  • Architectural Considerations

  • A Digital Optical Networking Approach


Key elements of l1 vpns

Key Elements of L1 VPNs

  • Management Plane

  • End-to-end VPN visualization (CNM) & administration

  • FCAPS

  • Network planning

  • Control Plane - GMPLS/ASON

  • Topology discovery

  • Route computation

  • Service provisioning and restoration

  • Data Plane

  • Scalable transport & bandwidth management

  • Multi-service support

  • Protection and restoration


Key elements of l1vpns data plane considerations

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


Key elements of l1vpns control plane considerations

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


Key elements of l1vpns management plane considerations

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


L1vpn abstraction

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

L1VPN Abstraction

Customer Network Management view

20G 

20G 

30G 

30G 

Customer Network

40G 

Carrier

EMS/NMS

Carrier Network


Outline3

Outline

  • Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications

  • Key Application Requirements

  • Architectural Considerations

  • A Digital Optical Networking Approach


L1vpn service model options discussion

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


L1vpn service model options contd discussion

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


L1vpn service level requirements discussion

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.)


Optical architecture options for l1vpns

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O

O

O

O

O

O

Local Add/Drop

O

O

O

O

O

O

O

O

O

O

ODXC

Optical Architecture Options for L1VPNs

Local Add/Drop

Local Add/Drop

Optical Digital Cross-Connect (ODXC)

ROADM/WSS

Digital Optical Networking

  • Separate switching + WDM

  • Digital sub-l switch: ODUk or STS-1/VC-4

  • OEO conversion of 100% of WDM traffic

  • Add/drop, switch, groom 100% of line capacity

  • All-optical wavelength switching

  • No wavelength conversion

  • No sub-l switch, mux and grooming without separate OEO

  • Transponders only for local add/drop

  • Integrated switching + WDM

  • Digital sub-l ODUk switch

  • Add/drop, switch, groom 100% of line capacity

  • Client optics only for local add/drop


Outline4

Outline

  • Dynamic Wavelength-On-Demand Services & Layer1 VPN Applications

  • Key Application Requirements

  • Architectural Considerations

  • A Digital Optical Networking Approach


Digital optical networking full 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 & management

Digital Optical NetworkingFull Reconfigurability at Every Node

Digital Electronics

& Software

Integrated Photonics

Integrated Photonics

  • Sub- add/drop

  • Digital switching

  • Signal regeneration

  • PM & Error correction

  • Digital Protection

  • Digital OAMP

Truly unconstrained reconfigurable optical networking


Key network architecture enablers for wavelength on demand and l1vpn services

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 s photonic integrated circuit innovation

100 Gb/s Transmit

100 Gb/s Receive

Infinera’s Photonic Integrated Circuit Innovation

100 Gb/s Transmit

100 Gb/s Receive

5mm

  • Direct Benefits

    • Size, power, cost, reliability

  • Strategic Benefits

    • Low-cost OEO conversion allows a Digital Optical Network paradigm


Benefits of electronics in optical networks

Benefits of Electronics in Optical Networks

  • Reconfigurable Switching

  • Wide choice of switching/grooming granularity (VC-4, ODU-1, packet)

  • Fundamental to managing and grooming customer services

  • Highest level of reconfigurability

  • Dispersion Compensation

  • FFE and DFE can compensate upwards of 1000ps/nm

  • MLSE can correct upwards of 3000ps/nm dispersion

  • Significant space savings vs. DCF

  • 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

  • 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


Evolving to otn bandwidth management

SONET/SDH Networking

DS1/3 & E1/3

OC48/STM-16

OC3/STM-1

OCh (DWDM) at 11.1 Gb/s

GbE

OC192/STM-64

OC12/STM-4

10 GbE LAN PHY

STS-1/VC-4 switching

OC48/STM-16

OC48/STM-16

OC192/STM-64

ODU1 (2.5G) switching

OTU1/OTU2

l1 …lN

l1 …lN

l1

li, lj

. . . . .

O-E-O

O-E-O

O-E-O

O-E-O

ln

O-E-O

O-E-O

O-E-O

O-E-O

Evolving to OTN Bandwidth Management

OTN Networking

  • Digital sub-l bandwidth management

  • End-end digital OAMP & PMs

  • Robust digital protection

  • End-end service management

Optical/Wavelength Networking

(R)OADM switching

  • Digital sub-l bandwidth management

  • End-end digital OAMP & PMs

  • Robust digital protection

  • End-end service management

  • Multi-service support

  • Transparent service transport

  • WDM scalability and reach

  • Multi-service support

  • Transparent service transport

  • WDM scalability and reach


Integrated sub bandwidth management

Conventional WDM Networks

Separate WDM & OTN layers

Sub-l grooming only with ODXC

Manual grooming complexity or extra cost for ODXC

Digital Optical Network - OTN

Integrated WDM and OTN bandwidth management

Sub-l grooming at every node

End-end service management, PM and OAM

O

O

O

O

O

O

O

O

O

O

OXC

O

O

O

O

O

O

Integrated Sub- Bandwidth Management

ODU1 bandwidth management

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

O-E-O

OTUk services

Integrated end-end OTN digital optical networking at every node


Digital optical network characteristics

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


Dynamically reconfigurable bandwidth gmpls uni

Optical LSP

Request

Dynamically Reconfigurable BandwidthGMPLS UNI

Router C

  • 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

A

C

Router A

Router B

D

B

GMPLS

UNI

Router D

IP Virtual Network Topology

Dynamically allocatable IP capacity

Baseline IP layer connectivity


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

Layer 1/0

DWDM

Layer 3/2

Router

<100G>

100GbE SR

100G Serdes

100GbE MAC

G.709 &other logic

100GbE SR

PhotonicIntegratedCircuit

Packet Proc.

Fiber

Super- Next-gen Services


L1vpn evolution

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


Summary

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


  • Login