Dynamic Network Fabric for NFV Mario A. Snchez , Joon-Myung Kang, - - PowerPoint PPT Presentation

Dynamic Network Fabric for NFV

Mario A. Sánchez, Joon-Myung Kang, Ying Zhang

Research Scientist, Networking, IoT and Mobility Lab

Confidential

Overlay Virtual Network Fabrics

Secured-Peering 1 Secured- Peering 2

>> Potential Functional Egress Potential Egress <<

Secured-Peering 3 Secured- Peering 4 Secured-Peering 5

Potential Egress <<

<< Ingress traffic

Overlay virtual network fabrics are essential in the evolution and deployment

• f NFV and distributed Service Provider

datacenters SDN based Overlays on various underlay networks providing datacenter/cloud network virtualization

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Benefits - Enhanced Smart Virtual Network Fabric

• Higher service capacity with smaller resource footprint
• Significant reduction in resource footprint and operational/mgmt overhead while maintaining

SLAs

• Applicable to enhance multiple NFV solutions with multi-site deployments: vCPE,vIMS, vEPC

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Enhanced Smart Virtual Network Fabrics for NFV/SPs

• Intelligent workload aware overlay over IP networks with

real-time measurements and predictive analytics

• Monitor end-to-end SLA per-flow or flow aggregates with

paths over underlay and SFCs

• Workload driven smart dynamic solution for distributed

datacenters/POPs Underlay-Aware Overlay

Optimizes the Network Environment

Bandwidth-Aware Resilient VNF Placement

Optimizes the Compute Environment

SLA Monitor and Manager

Monitors Cloudified NFV solution

HPE NFV Solution

E.g., NFV System, ConteXtream Base HPE vE-CPE Foundation

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Virtual Network Fabrics Overview

Cloudified vE-CPE

• Increased agility – faster time to revenue

– Replace per branch dev-ops with continual, decoupled dev-ops per enterprise, applied to carrier cloud as whole

• Lower TCO

– CAPEX: Reduces vE-CPE resources (upto 4x in scenarios) – OPEX: Simplifies mgmt. and provisioning

• Improved Reliability and Availability

– Distributed POPs are resource pools with increased availability – Eliminate impact of POP/Rack failures, spikes, and stampedes

• SLAs monitored to guarantee user experience while traffic

dynamically mapped for maximum efficiency

vE-CPE Challenges

• Over-provisioning resources per enterprise branch

inefficient - increases CAPEX

• Slow and Complex semi-manual dev-ops with risky
• nboarding increases OPEX, slows time to revenue
• POP or rack failures require 1+1 availability
• Inability to distribute demand spikes to POP overlay

edges without protection from SLA violations

• Inefficient provisioning of VNF resource mgmt. leads

to fragmentation of resources higher TCO

vE-CPE

vE-CPE

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Multi-site Topology

1 2 3 4 5 6 7 8 9 172.24.4.11 172.24.4.12 172.24.4.13 172.24.4.14 172.24.4.15

POP1

172.24.4.111

POP2

172.24.4.112

POP4

172.24.4.115

POP5

172.24.4.114

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Interactions between different components

UAO VNF Placement SLA Verifier Control

• 1. Does PoP x have

sufficient resource? If so, create the chain

• 2. Not enough

resource or Chain is created successfully

• 3. Which remote

PoP to use?

• 4. PoP x
• 5. Is chain x set up

correctly? Does chain x satisfy SLA?

• 6. Chain x violates

policy/SLA

Use cases

• A customer requires a new chain:
• 1. (PoPx = local PoP)->2->3->4->1-

>2…5->6

• A rack fails:
• 3->4->1->2->5->6
• Traffic spike
• 6 ->3->4->1->2

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Underlay-Aware Overlay (UAO)

• Utilizes knowledge of underlay network performance

to optimize and improve overlay performance

– Dynamically maps traffic optimal resources – Granular support: per-flow overlay route decision logic – Standards-based: Plug-in to ODL overlay control

• UAO Routing Optimization

– Aware of joint paths – Aware of load injected from paths with joint bottlenecks – Distribute local load to equalize load on bottlenecks assuming stable peer routing policies

• Increases reliability and availability

– Eliminates impact of rack or PoP failures – Increases efficiency of underlay to absorb failures

1000 2000 3000 4000 5000 6000 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6

Max Delay

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Underlay Aware Overlay

POPBà POPA POPBàPOPC POPAà POPB POPAàPOPC POPCà POPA POPCàPOPB

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Underlay Aware Overlay

POPBà POPA POPBà POPC POPAà POPB POPAà POPC POPCà POPA POPCà POPB POPBà POPA POPBà POPC POPAà POPB POPAà POPC POPCà POPA POPCà POPB POPBà POPA POPBà POPC POPAà POPB POPAà POPC POPCà POPA POPCà POPB

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Underlay Aware Overlay

POPBà POPA 0.9 POPBà POPC 0.1 POPAà POPB 0.8 POPAà POPC 0.7 POPCà POPA 0.1 POPCà POPB 0.3 POPBà POPA 0.9 POPBà POPC 0.1 POPAà POPB 0.8 POPAà POPC 0.7 POPCà POPA 0.1 POPCà POPB 0.3 POPBà POPA 0.9 POPBà POPC 0.1 POPAà POPB 0.8 POPAà POPC 0.7 POPCà POPA 0.1 POPCà POPB 0.3

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Path Correlation Matrix

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Smart Virtual Network Fabric Overview

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Underlay-Aware Overlay (UAO)

• Utilizes knowledge of underlay network performance

to optimize and improve overlay performance

– Dynamically maps traffic optimal resources – Granular support: per-flow overlay route decision logic – Standards-based: Plug-in to ODL overlay control

• UAO Routing Optimization

– Aware of joint paths – Aware of load injected from paths with joint bottlenecks – Distribute local load to equalize load on bottlenecks assuming stable peer routing policies

• Increases reliability and availability

– Eliminates impact of rack or PoP failures – Increases efficiency of underlay to absorb failures

1000 2000 3000 4000 5000 6000 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6

Max Delay

Thank You