Extending SDN & NFV to WAN
This session will walk through the evolution in branch networking and how SDN & NFV principles can be applied to the enterprise WAN to achieve increased reliability and flexibility. It will also cover how to lower the associated operational expense of running a classic enterprise WAN and what industry trends are pressuring changes on the design of such networks.When applying SDN & NFV principles to the WAN, there will be a natural reduction in complexity of managing services and guaranteeing uptime of network connectivity.
About Tim Van Herck
Tim is the Director of Technology and founding member at VeloCloud Networks.He is responsible for building out a global network of Points of Presence to deliver virtual last mile service to enterprise branches. Prior to joining VeloCloud, Tim was a founding member of Aryaka Networks, which offers WAN Optimization as a service. Tim has been passionately following the leading edge of network virtualization and security solutions for the past 15 years. He holds a master's degree in Industrial Engineering from the University of Antwerp, and is based in VeloCloud's headquarters in Los Altos, CA
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Tech Talk by Tim Van Herck: SDN & NFV for WAN
1. Extending SDN & NFV to the WAN
Tim Van Herck | Director Technology
September 23, 2014
2. Branch Networking
Current Best Practices
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MPLS
Internet
Large Branch
Small Branch
Headquarter / DC
Business Critical Apps
Backup IPsec VPN
WANop
WANop
Low Capacity
Unreliable
Business critical apps MPLS
IPsec VPN over Internet as backup
Limited to no redundancy on Internet link
Services concentrated in HQ / DC
SVC
SVCSVC
SVC
SVC
SVC
SVC
SVC
SVC
3. Market evolution
Globalized workforces
Results in more smaller branches with no on-site IT support
Need for centralized management, visibility and control
Applications move into the cloud
Less DC’s needed resulting into consolidation
Last mile Internet link become critical for business continuity
MPLS doesn’t get you to the cloud
Cost & Risk reduction pressures
Diminishing IT budgets – Private network is largest line item
Increased availability of inexpensive (wireless) broadband
Inclination to use pure OPEX services with no to minimum CAPEX exposure
Limited time investment to evaluate new products and services
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4. Broadband Circuits Financial Drivers
US Average $/Mbps (10 Mbps equivalent)
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65% Cost Savings80% Cost Savings
Private
Backed by SLA
6+ weeks lead times
Symmetrical
Dedicated
2~4 weeks lead time
Asymmetrical
Oversubscribed
2~4 days lead time
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5. Next Gen Branch Networking
How does enterprise IT want it too look
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Large Branch
Small Branch
Headquarter / DC
Internet
LTE
Cable
Cable
Fiber
DSL
DIA
DIA
Reduce/Remove functional networks
Add/Drop capacity without service interruption
Use all links simultaneously – No Active/Standby
Leverage inexpensive broadband links (including wireless) as sole transport
Individual ISP outages/brownouts shouldn’t be an acute concern
Rapid deployments (same day)
Migrate service complexity (monolithic service sets) into the cloud
Centralize what you can, keep local what you must
SVC
SVC
SVC
SVCSVC
SVC
SVC
SVC
6. Why can’t we do this today?
The Service Angle
Deploy hypervisors & attach to existing router
Extra piece of hardware
Need to send out an IT staff member
Manually establish service chaining
Complex PBR rules in the router, error prone
Difficult delivery model of the virtual appliance
Management access susceptible to network quality of single link
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Internet
Small Branch
Headquarter / DC
PBR
Unreliable
Cable
DSL
Hypervisor
7. Why can’t we do this today?
The Network Angle
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DSL LINK
CABLE LINK
VOIP Calls Dropped
Video Artifacting
VDI Sessions Stalls
Web Traffic Slowed
Session
Balanced
traffic
ECMP, PBR
8. Why can’t we do this today?
The Network Angle
ECMP: Equal cost but not equal
Quality mismatch between flow & links
PBR:
Complex failover & link condition monitoring model
Map application to a link underutilized links
Dynamic Routing protocols
Not capable at reacting to changing networking quality (congestion, packetloss, latency, jitter)
Only acts on hard link outages
Not application aware
Link / Next hop focused
Leads to wasted resources
Active / Standby link configurations
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9. Emerging vCPE Concept
Combines SDN & NFV principles to the enterprise branch WAN edge
SDN segregates control & data plane for faster alignment with business needs
Allows for different packet & flow handling techniques to be implemented as an overlay
E.g. Link aggregation and ISP abstraction
NFV allows Network Function to be moved to the ISP edge where they can be
more effectively operated and scaled out
Future proofs the CPE
Quickly deliver services at the branch based on customer needs
Accelerates cloud adoption by:
Providing a reliable network connection to SAAS applications
Providing mechanisms to move services to the place best suited in the network
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10. Cloud-Delivered WAN using SDN principles
Data plane: Highly distributed and inherently redundant
Cloud delivered
Control plane: Centralized visibility to replace traditional routing
Quickly Extensible
REST API controlled
Extending SDN to the branch through Cloud Delivery
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Distributed
Data Plane
Centralized
Control Plane
vCPE
11. Extending NFV into the branch
Deliver and orchestrate NF & Services from a central locations
Extract complex functions from the branch into the DC / ISP Edge
Ability to rely on SAAS services
Embedded Service chaining
Control from branch to DC
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Distributed
Data Plane
Centralized
Control Plane
vCPE
SVC
VPN
NF
NF
SVC
SVC
NF
ORCHESTRATOR
12. VeloCloud
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Call home for config, policies
and updates
Instant cloud VPN
One-click virtual service
provisioning
Zero Touch Thin Branch
Auto service characterization
Business grade reliability &
performance
Apps/servers not tied to
physical links
Virtualized WAN
Optimized path to DC, SaaS,
branches
No backhaul
Auto selection of optimal
gateways
Direct to All Apps
Data Centers/vDC
Branch
Internet
VPN
SaaS
VPN
No DC deployment
Auto scaling / redundancy
Global distributed coverage
Pay as you grow
Network as a Service
• Optimized application performance & reliability
• Cost effective and rapid deployment
• Direct and controlled access to all applications
15. Summary
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VeloCloud is the only complete solution with all three elements of a Cloud Delivered WAN
Cloud
Network
(SDN)
Enterprise Grade
Internet
(NV)
Virtualized
Services
(NFV)
Zero-Touch at branch
10x faster deployments
3x-5x TCO savings
Better application
Performance
Provides visibility, security and policy
control for all traffic