Scaling Cloud Networks with Packet-Optical Transport & Transport SDN

Transcription

1 Scaling Cloud Networks with Packet-Optical Transport & Transport SDN Chris Liou VP Network Strategy Infinera

2 Cloud Networking Trends ATT, VZ Spend Big 7 ICP Spend ICPs Greenfield advantage, no legacy IT-driven culture, processes, innovation Focus on innovation, speed & performance Telcos/SPs Adoption of cloud based initiatives/strategies & services Acquisitions & investments in SDN, Cloud Requires co-existence w/ existing businesses Infinera Cloud networking fueling substantial growth in optical transport markets. Source: ISI Group Report on Hyper-scale Capex Trends, Feb 2014

3 Challenges of Enabling Inter-DC Scale Managing key network dimensions Fiber capacity, BW services Traffic growth (dynamicism, duration, elasticity) BW distribution amongst DC sites while keeping these aspects under control OpEx (space, power) Total network-resource efficiency & utilization Operational manageability & dexterity Application-level performance & availability Scalability concerns differ between ICP, Telco/SP & DCOs Infinera

4 Observations on Cloud Networking Deployments ICP Sparse mesh M2M dominant SDN enabled No legacy No network resale DCO P2P, Ring Some M2M SDN early Little legacy Sell network & XaaS services Telco/SP Mesh Reachability/SLAs SDN evolution Legacy anchor Sell legacy, network & XaaS Differing needs drive different packet/optical strategies Infinera

5 Two Approaches for IP/Optical L3/L2 L3/L2 PVW 1 PVW 2 100GE ODU4 100G l P2P Transparent Pipe 100GE 100GE ODUflex 100G l CoS 1 CoS 2 EIR CoS n PVW m (L1)/L0 L2/L1/L0 Traditional Optical Transport IP/MPLS over transp. wavelength Rigid coupling of router to optics Singular IP adjacency per interface QoS functions per interface/wavelength Packet-aware Transport IP/MPLS over pkt-aware virtual wavelength (PVW) Increases traffic engineering flexibility Map pkt flows to dynamically resizable PVWs Differentiated pkt & transport QoS per PVW Infinera

6 Packet-aware Optical Transport Networking ML glue L3/L2 L2/L3 Conventional Transport (L1)/L0 PICs Enable convergence without compromise Packet Aware Transport L2/L1/L0 PICs Enable convergence without compromise IP Topo decoupled from physical ports Functional separation of packet/optical layers Packet-awareness enables cross-layer awareness IP links coupled w/ & switched at l granularity Enables packet aggregation & L2 svcs on transport Inefficient aggregation, especially at 100GbE Virtualizes router port to enable scale & flexibility Scalability challenges for network protection Differentiated, customizable QoS per group of LSPs Infinera

7 Data Center Enabling Efficiency & Flexibility through Packet/Optical Convergence Scheduler n Scheduler 1 Optical transport network Router Class/Flow-based CoS Dynamically, Hitless 1 Resizable AC VSI PW 2 ODUflex ETH INTF AC VSI PW Transport based AC VSI PW PVW 1 Aggregation Infinera Packet-Aware Optical Transport ETH INTF AC VSI PW Flow Mapping & Packet QoS Packet classification, processing, scheduling, shaping Network Efficiency Gains 3 PVW n Sub-l Digital func. Grooming, Switching, Shared Mesh Protection Superchannel Superchannel l Optical func. WDM switching, restoration

8 Scalable, Efficient Network Resiliency Bandwidth-efficient service recovery schemes Granularity Speed MPLS FRR LSP/Facility <50ms (local link/node) GMPLS Restoration Wave (super-l, 100G 1Tb+) Multiple seconds New! GMPLS Restoration Virtual wave (1.25G 100G) <second G Fast SMP G.ODUSMP Virtual wave (1.25G 100G) <50ms (E2E efficiency) Fast SMP can offer scalable & economical alternative to MPLS FRR Expanded toolkit enables you to mix/match based on protection needs Choose protection at most appropriate granularity (packet, virtual wavelength, wavelength) Choose protection type (e.g., 0+1, 1+1, MLR, SMP) Enable differentiated performance SLAs per PVW Infinera

9 FRR vs Transport SMP Example B A 50G C B A C A C FRR/IGP Reconvergence Transport Fast SMP <50ms G.SMP protection of DC traffic can improve total network cost Reduces total network over-provisioning, particularly in IP layer Enables equipped router ports to be loaded at much higher utilization Up to 46% savings in router port bandwidth at only 8% increase in WDM port bandwidth Infinera A Novel IPoOTN Packet-Optical Architecture for Economical and Fast Protection of Link/IP Port Failures, S. Balasubramanian et alia, OFC 2015

10 Use Case: Transport-level Policy Based Forwarding Differentiated Transport QoS L3 Adjacency L2/L1/L0 Transport (EVPL) EVPL A-B High latency VW, CoS 2, 0+1 A EVPL A-C Low latency VW, CoS 1, Fast SMP Packet-aware Optical Transport B C How can one easily differentiate the transport of packet flows between 2 routers (eg, latency)? Solution: Form L3-adjacency between Router A to Router B & C over single router interface Establish EVPL services at transport layer Simplifies & scales traffic engineering across backbone Classify flows into transport (VWs) based on pkt parameters (address, DSCP, TOS, MPLS, ) Transport differentiated packet flows through optical backbone (path, resiliency, stat mux, ) Infinera

11 Transport SDN is Making Progress! Multiple use cases for Transport SDN Service innovation Operations automation Network resource (re-)optimization Multi-domain, Multi-layer, Multi-vendor Underlay control enables greater control in WAN Programmability, abstraction & virtualization of [L0/L1/L2] transport Standardization efforts underway Transport SDN now in production Integration via vendor-supplied optical domain controllers or APIs Coexistence with transport control planes / network abstraction E.g., Inter-Data Center bandwidth utility service based on Open Transport Switch (OTS) Infinera

12 Use-Case Application of Transport SDN for DCI DC replication App Self Service Portal End points Bandwidth Duration Latency Etc. Customer Console Infinera Data Center Inter-DC Network OSS/BSS Operator SDN Controller Open Transport Switch (OTS) Data Center Customer App APIs Data Center Understands daily data replication required Facilitates spot pricing Determines optimal time to initiate connection Key Benefits End user gets best pricing, pays only for BW needed Optimal resource utilization & sticky customer service

13 $/Bit, W/Bit SDN Orchestration & Programmability Operationalizing ML-Networks Multi-Layer Network Visibility & Control DC 1 DC 4 Packet-aware Optical Transport DC 2 Cross-layer visibility Resource/bandwidth coordination & optimization Multi-layer traffic engineering Multi-layer protection/restoration Active SLA & QoS Management DC 3 Higher capacities At lower cost & Power per bit Router OTN Digital Switching Optics Infinera

14 Summary - Benefits of Packet-aware Transport Enables scale by decoupling fiber scale from router interface scale Corollary: decouple IP topology from transport topology Increases bandwidth efficiency through dynamic, demand-driven capacity allocation Right-sized transport express lanes based on packet traffic conditions Increases router port efficiency & utilization Multiple express links w/ differentiated QoS per router interface Simplify operations & reduce LSP churn under failure scenarios Transport-level policy based forwarding Scalable SMP protection at Virtual Wavelength granularity Converged Packet-Optical Transport + SDN enables scalable, cost-efficient DCI Infinera

15 Thank You Infinera