Dynamic Network Fabric for NFV Mario A. Sánchez , Joon-Myung Kang, Ying Zhang Research Scientist, Networking, IoT and Mobility Lab
Overlay Virtual Network Fabrics Overlay virtual network fabrics are essential in the evolution and deployment >> Potential Functional Egress Potential Egress << of NFV and distributed Service Provider datacenters Secured-Peering 3 SDN based Overlays on various underlay Secured- networks providing datacenter/cloud Peering 2 network virtualization Secured- Peering 4 Potential Egress << << Ingress traffic Secured-Peering 5 Secured-Peering 1 Confidential
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 Confidential
Enhanced Smart Virtual Network Fabrics for NFV/SPs • Intelligent workload aware overlay over IP networks with real-time measurements and predictive analytics SLA Monitor and Manager • Monitor end-to-end SLA per-flow or flow aggregates with Monitors Cloudified NFV solution paths over underlay and SFCs • Workload driven smart dynamic solution for distributed Bandwidth-Aware Underlay-Aware datacenters/POPs Resilient VNF Overlay Placement Optimizes the Optimizes the Network Environment Compute Environment HPE NFV Solution E.g., NFV System, ConteXtream Base HPE vE-CPE Foundation Confidential
Virtual Network Fabrics Overview vE-CPE vE-CPE Cloudified vE-CPE vE-CPE Challenges • Increased agility – faster time to revenue • Over-provisioning resources per enterprise branch – Replace per branch dev-ops with continual, decoupled dev-ops inefficient - increases CAPEX per enterprise, applied to carrier cloud as whole • Slow and Complex semi-manual dev-ops with risky • Lower TCO onboarding increases OPEX, slows time to revenue – CAPEX: Reduces vE-CPE resources (upto 4x in scenarios) • POP or rack failures require 1+1 availability – OPEX: Simplifies mgmt. and provisioning • Inability to distribute demand spikes to POP overlay • Improved Reliability and Availability edges without protection from SLA violations – Distributed POPs are resource pools with increased availability • Inefficient provisioning of VNF resource mgmt. leads – Eliminate impact of POP/Rack failures, spikes, and stampedes to fragmentation of resources higher TCO • SLAs monitored to guarantee user experience while traffic dynamically mapped for maximum efficiency Confidential
Multi-site Topology POP4 172.24.4.14 172.24.4.15 POP5 172.24.4.114 POP2 6 9 172.24.4.115 5 8 172.24.4.112 2 7 4 172.24.4.12 1 3 POP1 172.24.4.11 172.24.4.13 172.24.4.111 Confidential
Interactions between different components Use cases • A customer requires a new chain: • 1. (PoPx = local PoP)->2->3->4->1- 5. Is chain x set up >2…5->6 Control correctly? Does chain x • A rack fails: satisfy SLA? • 3->4->1->2->5->6 • Traffic spike • 6 ->3->4->1->2 4. PoP x 2. Not enough 1. Does PoP x have resource or sufficient resource? If Chain is created so, create the chain successfully 3 . Which remote 6. Chain x violates PoP to use? policy/SLA VNF SLA UAO Placement Verifier Confidential
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 Max Delay assuming stable peer routing policies 6000 • Increases reliability and availability 5000 – Eliminates impact of rack or PoP failures 4000 – Increases efficiency of underlay to absorb failures 3000 2000 1000 0 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 Confidential
Underlay Aware Overlay POPA à POPB POPA à POPC POPB à POPA POPC à POPA POPB à POPC POPC à POPB Confidential
Underlay Aware Overlay POPB à POPA POPB à POPC POPA à POPB POPA à POPC POPC à POPA POPC à POPB POPB à POPA POPB à POPA POPB à POPC POPB à POPC POPA à POPB POPA à POPB POPA à POPC POPA à POPC POPC à POPA POPC à POPA POPC à POPB POPC à POPB Confidential
POPB à POPA 0.9 Underlay Aware Overlay POPB à POPC 0.1 POPA à POPB 0.8 POPA à POPC 0.7 POPC à POPA 0.1 POPC à POPB 0.3 POPB à POPA 0.9 POPB à POPC 0.1 POPB à POPA 0.9 POPA à POPB 0.8 POPB à POPC 0.1 POPA à POPC 0.7 POPA à POPB 0.8 POPC à POPA 0.1 POPA à POPC 0.7 POPC à POPB 0.3 POPC à POPA 0.1 POPC à POPB 0.3 Confidential
Path Correlation Matrix Confidential
Smart Virtual Network Fabric Overview Confidential
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 Max Delay assuming stable peer routing policies 6000 • Increases reliability and availability 5000 – Eliminates impact of rack or PoP failures 4000 – Increases efficiency of underlay to absorb failures 3000 2000 1000 0 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 Confidential
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