SDN for the Backbone

Christos Kolias,

Network Architecture, Orange Silicon Valley

Ethernet Technology Summit 2013 April 2-4, 2013 – Santa Clara, CA

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Orange Silicon Valley

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Software-Defined Networking

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Benefits of SDN

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SDN in the core

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Transport Network Virtualization

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Net Apps Store and Net Services

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Conclusion

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Orange, a worldwide presence

 _{Orange Silicon Valley (OSV), a wholly}

owned subsidiary of the Orange-France Telecom Group, is the Silicon Valley

presence of Orange

 _{Internet, Fixed, Mobile, TV provider}

 Orange is one of the major telcos, in 5

continents, 32 countries, 226 million

customers, 6 million business customers

 _{180,000 employees and ~ $ 57 b}

revenues in 2012

 _{Founding member of ETSI NFV. Member}

of Open Networking Foundation (ONF)

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“People want to control their own network”

Orange Silicon Valley

Software-Defined Networking (SDN)

“SDN supports the abstraction of the control plane from the data plane”

“Users can define (their) traffic flows and decide how these are treated in the network”

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source:ONF

Orange Silicon Valley

Why SDN

• Today’s boxes are closed & proprietary

̶ I want to add a new service/capability but my equipment (h/w & s/w) has to support it – hard and risky to innovate

̶ No elasticity. Too much complexity.

• Challenges from mobile growth to big data and cloud computing • Poor resource utilization

• Create an abstraction that

yields a logical view of the network (topology & resources)

• Network programmability • Open APIs

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Orange Silicon Valley

 _{Programmable platform brings agility & elasticity into network}  _{Allows for optimization & customization: Build Your Own}

Router, Firewall, Load Balancer, DPI, WAN Accelerator

 _{Supports intelligent management of traffic flows}

 _{Enabler for network virtualization. Great tool for cloud}

management.

 _{Deploy new, on-demand, tailored services & apps}  _{Resource discovery and monitoring}

 _{Unified method for traffic engineering, network management}  _{It is all about empowering the administrator/operator, user}

‒ More choices, more control ‒ Define your own rules/policies

Benefits of SDN

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Orange Silicon Valley

 _{Trends driving the need for SDN in the core}

‒ Large volumes of data that require to be moved around (often instantly) ‒ Virtualization (VM mobility)

‒ Cloud services, storage migration

‒ Lack of end-to-end capacity provisioning

‒ High maintenance costs for dedicated infrastructure facilities

 _{Ease of setting up long-haul paths (eg, OpenFlow can provide for}

the set-up of tunnels)

‒ Enhances fault tolerance ( easy to set/change back-up paths for disaster

recovery

‒ Load balancing (across your backbone)

‒ Improves security (rules pushed down quickly)

‒ Traffic monitoring and analytics (network weather map, forecast?) ‒ Easier to manage capacity across your network (e.g., less underutilized

paths, less over-provisioning)

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Orange Silicon Valley

 _{SDN-enabled network processors and switch fabrics for the core}

routers

 _{Add more intelligence (L4-L7) to (some) core routers – optional}  _{SDN as a management tool for multilayer switching}

 _{Enables interoperability and internetworking}  _{Run new core routing protocols}

 _{What would it entail for (G)MPLS? (SDN can be layer-agnostic)}  _{Impact of Network Functions Virtualization (NFV)}

 _{Three major uses cases:}

― Cloud bursting (elastic demand, workload migration)

― Network virtualization (collection/pool of hw/sw resources that appear

as they belong to a single entity)

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Google’s SDN WAN

Orange Silicon Valley

 _{Policy-based flow path set up}

‒ Event scheduling, e.g., use certain routes during peak/off-peak hours,

weekends, etc

‒ Adjust traffic paths (on the fly) as to adapt to changing network

conditions

 _{Centralized view & management}

 _{Lower costs, flexibility, programmability}  _{Google’s G-scale backbone network}

‒ improved availability & fault tolerance ‒ >95% utilization

‒ hitless upgrades

‒ elastic/powerful

compute

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 _{Dynamic Bandwidth allocation/scheduling} – who gets what, when & for how long

– choose level of granularity

– automation, calendaring

 _{Resource optimization} ‒ pooled capacity

‒ bundling (aggregation)/unbundling as needed  _{Active monitoring and real-time response}

‒ set up thresholds ‒ programmable alerts  _{Software-controlled}

 _{Physical Layer: single radio channel, optical wavelength (or}

a band)

Bandwidth on-Demand (BoD)

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Orange Silicon Valley

 _{SDN has found its place in data centers}

‒ Easier to implement & manage

 _{Transport SDN could enable end-to-end service delivery}  _{Challenges for transport SDN}

‒ Multi-layer, multi-domain, multi-vendor, multi-administrative ‒ Standardized northbound API

‒ Complex infrastructure (overlays), expensive equipment ‒ Migration path

 _{Carrier-grade solutions required for network operators/service}

provider

 _{Manage the network as a single (logical) fabric rather a collection}

of boxes

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Orange Silicon Valley

 _{Today, optical transport is quite static & rigid (“hardwired”)}  _{SDN in the optical domain can bring}

‒ Speed, agility and granularity (in assigning optical wavelengths) ‒ Programmability (in optical switching)

‒ Intelligence (in managing, virtualizing) ‒ Elasticity (in capacity scaling)

‒ Automation (in provisioning, reconfigurability)

 _{λ’s are application/service agnostic. SDN can bridge this gap}  _{Visibility into the optical network}

‒ We can know how many (and what kind of) bits a wavelength carries ‒ Expose optical domain constrains to the application

 _{Software-defined optical transmission (modulation) and}

transceivers

Optical Transport IP SDN Controller Applications/Services

Orange Silicon Valley 14

API

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Orange Silicon Valley

 _{Tier 1 network (DoE), operating at 100Gbps}

 _{Used SDN to traffic engineer paths at the optical level}

 _{OSCARS: provisioning s/w (with a GUI) to set-up/manage connections}

(e.g., provide source & destination nodes)

ESnet

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Orange Silicon Valley

 _{Create end-to-end virtual networks that run across the physical}

(optical/wireless) and transport/IP network

 _{What are we virtualizing}

‒ Bandwidth: wavelength spectrum (λ-slicing), radio band

‒ Node: router, OXC/ROADMS

 _{Further convergence & integration of IP and DWDM}

‒ Single control plane for both?

‒ Enhanced management & orchestration of optical and packet planes

 _Benefits:

‒ Independent operation: eg, run different routing algorithms on different VNs ‒ Traffic isolation, QoS preservation (need guarantees)

‒ Dynamically reconfigurable (based on traffic/service demands) ‒ Better utilization of existing fiber capacity

‒ Centralized control

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 _{SDN controller configures end-to-end paths based on}

– Available capacity (bps, λs)

– QoS parameters (eg., delay, jitter, burstiness) – Fault tolerance needs/ SLA requirements

– Elasticity demands (eg., ± 10% capacity) – Duration (mins, hours, days,weeks)

– Application characteristics, etc

Orange Silicon Valley

Net A Net B Net C

VN1 VN2 VN2

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Ethernet Optical Ethernet

SDN Management & Orchestration

OTN DWDM DWDM OTN ENET ENET ENET ENET _DWDM OTN ENET OTN ENET ENET DWDM λ- Controller ENET

IP Controller E/net Controller OTN Controller

FTTx

Wireless

End-to-End SDN?

Source: Ian Ku

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 _{Virtual Data Center (VDC): using virtualization technologies and}

cloud solutions to emulate your racks in a highly efficient, optimized environment

― Make physically dispersed hw/sw operate logically as one DC ― Virtual servers, virtual storage, virtual networking

― Multi-tenancy

― DR/BC: ability to redeploy fast (e.g., Japan earthquake)

 _{Cloud-wide management system: allocation, management &}

orchestration of resources. Virtual Data Centers (VDC) will be the basis of the new cloud.

 _{SDN can fundamentally change the way we design and build data}

centers

― Deeply programmable and virtualized ― Applications/services awareness

― Resource optimization (compute, storage, compute). Enhanced policy

(routing, TE, security) management

VDC: the new norm for the Cloud

Orange Silicon Valley

Software-Defined Virtual Data Centers will be the basis

of the New Cloud

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The Future Cloud Architecture

Ideally, the user should be able to specify his application demands (broadcast election video coverage for 12 hours and 50m subscribers) and the cloud should broker the specific resource needs (capacity, storage, bandwidth, etc)

SDN Controller Cloud Maestro SDN API Network Virtualization Cloud Broker

Smart Cloud

Cloud

Cloud Management Plane Cloud API

Server

Virtualization Virtualization Storage

Cloud App

Cloud API Cloud API

Cloud App Cloud App

Network Virtualization Plane

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Orange Silicon Valley

 _{Recently launched joint-operator initiative (under ETSI) to push for}

virtualizing (specialized) network functions leveraging software

 _{CDN, home gateways, Firewalls, DPI, application accelerators, load}

balancers, mobile packet core, etc.

 _{Gives rise to the virtual network appliance}

 _{Flexibility to easily, dynamically, rapidly launch new services}

 _{Reduced CapEx/OpEx; consolidation of devices (ease of management);}

breeds innovation in deploying new services

 _{Virtualization of transport network functions: open issue}

 _{SDN can be enabler for NFV}

 _{More information:} portal.etsi.org/portal/server.pt/community/NFV . Next

meeting April 22-23, Santa Clara

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Orange Silicon Valley

 _{Virtualization (“slicing’) of the core could create PVNs (Private}

Virtual Networks), desirably on-demand

 _{NFV and Virtual Appliances could enable this}

‒ Rapid & dynamic instantiation and provisioning of services ‒ Easily scale up/down and out

‒ Play-and-pay as you go and as you grow

 _{New peering models}

 _{Additional revenue proposition for network providers/carriers}

(telco 3.0)

‒ CapEx/OpEx savings, flexibility for VNOs (Virtual Network Operators) ‒ Network providers monetize on excess capacity/resources

‒ 3rd party app developers and content/service providers

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Open interface to hardware

Simple Forwarding Element Simple Forwarding Element Simple Forwarding Element Simple Forwarding Element Simple Forwarding Element

SDN

Virtualization or “Slicing” Layer

Mobile IPTV Voice

SDN Controller

Open interface to hardware

Virtual Networks (slicing)

Network Operating System 1 Network Operating System 2 Network Operating System 3 Network Operating System 4 Feature Feature

Controller 1 Controller 2 Controller 3 Controller 4

Mobile IPTV Voice

-slicing based on any criteria, e.g.,

type of net, service, app, content, class-of-service, customer

26 provider’s network as a sliceable/virtualizeable substrate

Home Gateway Set-Top Box IMS WiFi offload SIP 4G/LTE Backhaul WiMax DSL Controller IPTV Controller VoIP Controller Mobile Controller Network Administrator Controller

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 _{SDN-enabled backbone: phased adoption}

‒ DWDM could be the first step. SDN-enabled OTN as step two ‒ Hybrid hardware/networks

 _{Infrastructure collapse, i.e., network elements with multiple}

functionalities

 _{Challenge: management of virtual networks than span across}

multiple and different service provider networks

‒ Do we need a inter-controller communication protocol? ‒ Core/transport devices will take longer to be virtualized

 _{Build out parallel infrastructure and transition slowly/smoothly as}

rolling out new boxes

 _{Great for greenfield deployment, less hassle, fresh architecture}  _{Could impact the way to design, build & manage our networks}

SDN in the backbone: Migration

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 _{Full integration/sync of NM with control plane?}

‒ administration ‒ security

‒ provisioning ‒ monitoring

 _{Out-of-band or in-band?}  _{Run across full stack?}  _{Support for network}

virtualization M anagem ent & O rches trat ion Plane Physical Plane (optical, wireless, ethernet) Data Plane (core routers, switches)

Network Virtualization Plane Net Apps/Services/Functions

Control Plane

Network Management

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 Create a market for network applications & services

– an app for bandwidth control

– an app for TE

– an app for policy control

– an app for video/content distribution

– an app for Operations/Business Support Systems (OSS/BSS)

Net Apps Store & Net Services Market

CONTROL PLANE

DATA PLANE

software-defined network

NETWORK OPERATING SYSTEM

LOAD

BALANCING BW CONTROL SECURITY CDN

Net Apps

 Revenue sharing model (provider-3rd parties)

 How can I get a slice (that meets my needs/requirements e.g.,

performance/security- SLAs, capacity) for broadcasting the Oscars/SuperBowl on a Sunday evening ?

– Deliver a virtual/cloud network-as-a-service

 A market (actually, bazaar) for cloud networks

– Customizeable, ephemeral slices (including bandwidth)

 New players in the market leveraging SDN?

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 _{SDN brings automation, orchestration, optimization, scale,}

programmability and customization to the network (IP+Optical)

 _{SDN virtualizes control plane. Application-aware networks}  _{Great, dynamic tool for managing bandwidth & traffic}

 _{It can propel the integration of the IP and optical control planes}  _{Virtualization of the photonic layer can lead to the virtualization of}

the core. Software-Defined Network Virtualization

 _{Migration path will have to be thought out}  _{It is the power of software}

 _{Make your network more intelligent. Smart devices & apps* need}

smart networks!

Key Takeaways

Orange Silicon Valley *app= application or appliance

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SDN is like a buffet !

NFV is like …

You need soda to digest afterall…

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[email protected]

thank you

!