MPLS/SDN Intersections Next Generation Access Networks

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MPLS/SDN IntersectionsNext Generation Access NetworksAnthony MageeAdvanced Technology – ADVA Optical NetworkingMPLS & Ethernet World Congress 2013

Agenda Carrier Requirements – Current & Future Software Defined Networking - What does it mean? Challenges ahead in deploying SDN in Access NetworksMPLS/MPLS-TP in Access Networks Explore Intersections of SDN/MPLS SDN Next Steps & Research Activities2 2013 ADVA Optical Networking. All rights reserved. Confidential.

Carrier Requirements3 2012 ADVA Optical Networking. All rights reserved. Confidential.

Carrier RequirementsTraditional/Current Path Provisioning Static and Dynamic ScalabilityWorking Protection/ResilienceStandby OAM, Fault Finding & Fault Resolution SLA Verification/Performance Monitoring Synchronization Security broadly met via Carrier Ethernet and MPLS-TP4 2013 ADVA Optical Networking. All rights reserved. Confidential.

Carrier RequirementsRequested Predicted Rapid re-provisioning & Elastic Services - CloudElastic Cloud Hybrid Models (Carrier Ethernet/MPLS) MPLS interoperation at Carrier Ethernet Latency challenges LTE Backhaul and CoMP Air Optimisation - X2 channel delays 1ms 5% Hit in optimisationAdoption of C-RAN and BBU Pooling Network Convergence 5Converged Fixed Line and MobileEconomy and Scale 2013 ADVA Optical Networking. All rights reserved. Confidential.Courtesy: Orange

Carrier RequirementsRequested Predicted VirtualizationSlicing of the network Virtual Functions onto common platforms ProductionBest Effort, Premium Services, Auction (on-demand)Experimental/Development on top of ‘in-field’ equipmentAllow easy roll-out and avoid vendor lock-in – ETSI NFVDevelopment/Test Network Simulation - VMs of Nodes, simulate behaviour at ation Software Defined Networking6 2013 ADVA Optical Networking. All rights reserved. Confidential.

What is Software Defined Networking?7 2013 ADVA Optical Networking. All rights reserved. Confidential.

Software Defined NetworkingIsn’t as simple as If Packet Header(MidStr, 6, 3) “00-80-EA”then Tx Mgnt Port(ADVA Packet)else Tx Network Port(Unkown Resources(Switch2)Createnew LabelEntry inLIB(MPLS Switch 1ReturnNewFlow()Create ProtectionPath (Switch 1)ReserveResources(Switch2, Switch 3)Createnew LabelEntry(MPLS Switch 1)Createnew LabelEntry(MPLS Switch 2)Create ProtectionPath (Switch 4)ReturnSoftware Defined Networking not just code to control switch or network8 2013 ADVA Optical Networking. All rights reserved. Confidential.

Software Defined NetworkingWhat does it mean? Deterministic behaviour,predictable performance,rapid convergence Simplified planning,global optimization,off-line analysisCentralizedmanagement & control Secure multi-tenancy &infrastructure sharingHW abstractionand virtualization Better machine &service mobilityNetworkprogrammability Application-drivennetworkingSeparation of dataand control planeFlow orienteddata planeKey SDN innovations: virtualization and application-level programmability.9 2012 ADVA Optical Networking. All rights reserved. Confidential.

Deployment Challenges10 2012 ADVA Optical Networking. All rights reserved. Confidential.

SDN in Access NetworksWhat are the Challenges Technology GapsMobile Backhaul - ProgrammableSynchronization layer?Physical & Protocol Layers Service Level Agreement Analogue/HW as well as protocolproblemClock Budget - Performance overnumber of hops into Path decisionmakingPhysical layer Vs Packet LayerSDN to associate different layers –physical/packet Capability detectionDiscovery of clock referencesFrequency signals & Time Protocols Fixed Line – Adaptive SLA Model forElastic Services QoS/OAM around user defined model not a topology parameter OAM tools need to be adaptive,scalable, programmable Avoid over-dimensioning/ Cost/VolumeFlow Based Fault Finding Tools needto be adaptive VCCV/Connectivity Check, LoopbackReflectors compliment service demandSDN to support OAM/SLA reservationand management – as well as serviceIf PTP devices are meant to be Syntonized(Frequency locked) with SyncE, Path divergenceneeds to be detected and corrected.PTP 1588 FlowPTP Flow Asymmetry needs to bedetected, and correctedSyncE Clock SignalSyntonizedSyntonizedTools like OpenFlow are beginning to consider QoS, but still some way to go 11 2013 ADVA Optical Networking. All rights reserved. Confidential.

MPLS/MPLS-TP in Access NetworksStrengths & Challenges MPLS Strengths Well defined, widely adopted in other parts of the networkControl Planes entrenched in coreUnrealistic to expect/want a clean slate (SDN) approach to disrupt Challenges - MPLS/MPLS-TP in the Access NetworkFootprint/Power/CostAccessOperational ModelCoreSmaller/Simpler/Lower Cost/Power limited Devices- Need for a control plane?- Optimised Control Plane, Interop?LatencyMBH Air Interface – CoMP and X2 Channel Delay – Latency sensitive- Drive forwarding decisions on lowest layers and simple topology- MPLS/TP sit too far into header to optimise- Simple network unlikely to benefit from MPLS/TPRepair/Replace Model different from Aggregation/Core- Plug n Play- Training of field workforce to cope with scaleSynchronizationSynchronization in MPLS networks is still a challenge- TICTOC in IETF working towards on-path support i.e. Transparent Clock- Still not a complete solution- Correlation of clock issues between physical and protocol layersMPLS & MPLS-TP do not deliver all of the needs of the Access Network12 2013 ADVA Optical Networking. All rights reserved. Confidential.

Intersections of SDN and MPLS13 2013 ADVA Optical Networking. All rights reserved. Confidential.

SDN & MPLS IntersectionsOpenFlow as one implementation of SDN Concept MPLS-Enabled OpenFlow Switch OpenFlow in WDM-PON OLTCarrier Ethernet functions & MPLSInterop at Carrier Ethernet Carrier Ethernet Access facing interfacesMPLS Shim layer in HardwareOpenFlow Controller OLT analogous to DSLAMDSLAM as a BRAS/BNG Distributed BRAS FunctionOLT with OpenFlow & OpenBRASMPLS Control lowPipelinesOpenFlow WANControlled FacingMPLSModuleMPLS-Enabled OF s/22-ONS2012SparcA1 ONS2012 poster 09.pdf 2013 ADVA Optical Networking. All rights reserved. Confidential.

Where might intersections arise? Access Network Edge! SDN Access Network – where services originate and are deliveredSDN management layer interaction with Control Plane Path requests - Access node to remote Access nodeSDN Path detection/provision in the access causes MPLS path request MPLS Control Plane to handle path provision across the MPLS core Seamless Access SDN with MPLS Aggregation/Core Results in MPLS hand-off from the AccessSDN to MPLS Control Plane API FunctionEthernetCPRI/dRoFAccessSDNEdgeGatewayMPLS CoreEthernet/QinQ/MPLS/IPProgrammable MAC/VLAN/PBB & MPLS to MPLS Mapping15 2013 ADVA Optical Networking. All rights reserved. Confidential.

SDN in Access & SDN Optical Layerwith MPLS on top SDN based Optical bypass underpinning MPLS Core SDN in Access network, SDN in Optical Layer & MPLS on top Proven use cases – OFELIA project – EU FP7Working in orchestrationDepends on - Control Plane, SDN Controllers, APIs Communication through Open InterfacesSDN to MPLS Control Plane API FunctionMPLS PEdgeGatewaySDN/OpenFlow based Optical Bypass –underpinning/optimising MPLS CoreProgrammable MAC/VLAN/PBB & MPLS to MPLS Mapping16 2013 ADVA Optical Networking. All rights reserved. Confidential.

SDN Next Steps & Research17 2013 ADVA Optical Networking. All rights reserved. Confidential.

Software Defined NetworkingSteps to get there .Extend SDN technologies into the optical/Access domainsEnable interworking with IP/MPLS networksDefine open northbound interfaceProvide framework for virtualization of SDN domainsAddress open architecture questions(e.g. allocation of discovery, OAM, protection & timing)18 2012 ADVA Optical Networking. All rights reserved. Confidential.

Software-Defined NetworkingCollaboration & Research19StandardsCollaborations, Trials, EcosystemNetwork Architectures/StudiesSDN Applications Emergence 2013 ADVA Optical Networking. All rights reserved. Confidential.

Key MessagesAccess Networks – Programmability/User Defined/AdaptiveSDN & MPLS Approach each have deployment challengesSDN in Access Compliments MPLS Aggregation/CoreKey Concepts demonstrated on Optical domain - OFELIASoftware Defined Networking in the Access is on it’s way 20 2013 ADVA Optical Networking. All rights reserved. Confidential.

Acknowledgements: This work was supported by the European Commission underthe Seventh Framework Programme (FP7) by the project IMPACT, and COMBO.Thank youamagee@advaoptical.comIMPORTANT NOTICEThe content of this presentation is strictly confidential. ADVA Optical Networking is the exclusive owner or licensee of the content,material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited.The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representationsof any kind, either express or implied. ADVA Optical Networking shall not be responsible for and disclaims any liability for any loss ordamages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused byor in connection with using and/or relying on the information contained in this presentation.Copyright for the entire content of this presentation: ADVA Optical Networking.

SDN in Access network, SDN in Optical Layer & MPLS on top Working in orchestration Depends on -Control Plane, SDN Controllers, APIs Communication through Open Interfaces Access SDN SDN to MPLS Control Plane API Function Edge Gate way Programmable MAC/VLAN/PBB & MPLS to MPLS Mapping Ethernet CPRI/dRoF

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