Enabling Virtual Transport Network Service
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The document discusses the emergence and significance of Virtual Transport Network Services (VTNs) as a response to evolving customer demands for on-demand services through both private and public clouds. It highlights Verizon's strategies in leveraging automation, virtualization, and software-defined networking (SDN) to enhance network efficiency and flexibility. The paper also outlines the challenges and considerations in implementing these services, including operational simplicity, scalability, and service recovery mechanisms.
Enabling Virtual Transport Network Service
- 1. Enabling Virtual Transport Network Service Vishnu Shukla OIF Carrier Working Group Chair Verizon, USA Globecom 2015 San Diego, CA, USA December 8, 2015
- 2. Outline • Network and emerging usage • Virtual Transport Network Service (VTNS) • Use cases • OIF role • Challenges
- 3. We’re Using the Network in a New Way Paek period Traffic composition 1H2014/ A new kind of business customer • Using both private and public clouds • Elastic Compute and storage requires an elastic network with on demand services A new network is needed that supports: • Bandwidth on demand to match compute/storage on demand technology • Multi-tenant • Higher Utilization and greater efficiency A new kind of service Provider • Supplies SaaS, IaaS, PaaS • Elastic compute and storage • Multi-tenant A new kind of Consumer • Living in the cloud, mobile • Applications are hosted in the cloud • Shifting from download to streaming • News events and new applications load the network in new ways • Mobile • Data, Data,… Source: Coriant
- 4. Verizon Approach • Automation • Virtualization • SDN • Increased use of open source software and commodity hardware • Flexible architecture Ensures Verizon is not locked into a single technology or strategy More than 70% of Verizon back office support systems are now fully virtualized creating powerful efficiencies
- 5. Verizon Approach (cont.) • Develop Vendor Ecosystem - Leverage knowledge of some of our key suppliers - Manage and coordinate SDOs
- 6. Virtualization • Sharing of Transport Network Resources • No dedicated resources • Dynamically allocated • Isolating traffic between different services • Limited to service endpoints • Exposing control at abstract level • Varying levels
- 7. Virtual Network Service Definition Take advantage of virtualization in SDN Offer customers controllable network slice Fixed Connection Dynamic Connection Dynamic Connection Client site A Client site B Client site A Client site B Client site D Client site C Client site A Client site B Client site D Client site C Virtual network with vNE & vLink Client controller Ctrl of virtual XC Connection controlled by network providers Leased Line Endpoints Only Fixed virtual network topology Static Dynamic Dynamic Connection Virtual network with vNE & vLink Client controller Rent virtual network resources from provider Client site Virtual network recursive creation Client site Client site Client site Client site Client siteClient site Dynamic/recursive virtual network topology
- 8. Working Protection Request On Line Real-time planning Real-time setup Autonomous Control Dynamic expansion Optimization • Multi-level SLA • Recovery • Network migration Physical Optical Network Virtual Network Topology Network as a Service Online Slicing Path Computation Survivability Analysis Global Optimization Tenants Seconds Online T-SDN Controller Benefits Real Time Resilient Robust
- 9. Transport Network Virtualization Use Cases • Private Cloud • More dynamic optical tunnels on-demand • Data Center Interconnect (DCI) • Integrate transport network with DC orchestration • Integrated Packet and Optical Network • Reconfigure optical domain based on IP
- 10. Transport Controller Physical Infrastructure Controls Physical Network Control Layer Infrastructure Layer Transport Network Today’s Model for SDN-Enabled Transport Network Application Layer App App App App controls exposed topology
- 11. Transport Controller Control Data Plane Interface Infrastructure Layer Application Layer App App App Control Layer Client Controller SDN Control & Network Virtualization Network Device Control Virtual Network Interface Northbound Interface Business Boundary
- 12. Transport Controller Physical Infrastructure Controls Physical Network Transport Control Layer Infrastructure Layer Transport Network Introducing the Client Layer Control Application Layer App App App Client Controls Virtual Transport Network Client Control Layer App App App Client Controller 2 App controls exposed topology VTN Topology 2 Client Controller 1 VTN Topology 1
- 13. Physical Infrastructure Controls Physical Network Transport Control Layer Infrastructure Layer Transport Network OIF Virtual Transport Network Services Application Layer App App App Client Control Layer App App App App controls exposed topology Transport Controller Client Controller 2 VTN Topology 2 Client Controller 1 VTN Topology 1 Client Controls Virtual Transport Network
- 14. Controls Physical Network Provider Control Layer Infrastructure Layer Enables Transport Network as a Service Application Layer App App App Client Control Layer App controls exposed topology Transport Controller A VTN Topology B Client Controller 1 VTN Topology A Client Controls Virtual Network Transport Network A Transport Network B Transport Controller B Cloud DC Cloud DC DC Controller DC Controller
- 15. Carrier Network Connection Type 1 – Fixed Connection
- 16. Carrier Network Connection Type 2 – Dynamic Connection Topology Exposes Endpoints VTN Topology
- 17. Carrier Network Connection VTN Topology Type 3 – Dynamic Connection Fixed Topology
- 18. Type 4 – Dynamic Connection Dynamic Virtual Topology Carrier Network VTN Topology Connection
- 19. What is OIF defining? • Service Attributes • Service Capabilities • Recovery Requirements • OAM Requirements Harmonize Services Definitions for all players, i.e. Transport Network Services - Providers - Users - Equipment/SW Vendors
- 20. Service Attributes • Service • ID / name • Service End Points • Type of Service • Topology • ID / name • Service Level Agreement • Connection • Type of Connection • TE Parameters • Traffic Matrix • Scheduling • Service Level Agreement
- 21. Service Capabilities • Connection – Is the customer allowed to • Create • Delete • Modify • Query • Receive automatic status updates? • Topology – Is the customer allowed to • Create • Delete • Modify • Query • Receive automatic status updates?
- 22. Recovery • Connection Level Protection/Restoration • May be provided by service provider or customer • Topology Level Protection/Restoration • Provided by provider • How to use both levels • Coordination mechanism when customer is responsible for connection recovery
- 23. Client Connection Recovery Carrier Network Connection VTN Topology Failurenotification
- 24. Provider Connection Recovery Carrier Network Connection VTN Topology Failurenotification–HoldonRecoveryFailurenotification–repaired
- 25. Provider Topology Recovery Carrier Network Connection VTN Topology Failurenotification–holdonrecoveryFailurenotification–repaired
- 26. OAM • East-West • Virtual Link OAM requirements • North-South • VTN Topology / Connection • Query/automatic Status Requirements Carrier Network Connection VTN Topology Transport Controller Client Controller North-South OAM East-West OAM
- 27. Challenges • Operational simplicity • On-board new clients rapidly • Differentiated service delivery • Automate resource allocation on the fly • Scalability • Support X transactions per hour • Security • Service isolation and authentication per client • Continuous Availability • Disaster avoidance / recovery • Current transport business model • Migration Path • Many SDOs, Open source activities • Common Information Model
- 28. SDOs ONF OIF (Transport) IETF/IRTF InterDC ATIS SW Infrastructure Southbound Interface Northbound Interface Openstack BBF, MEF ODL, NFV OPNFV OPEN SOURCE 3GPP High Level SDN/Data Center Reference Architecture with SDOs/Forums Focus Data Center HW Orchestration & Management Service Service Service Transport SDN Controller DC Mgt ONOS
- 29. Summary • Changing networking paradigms • SDN has great promise to improve transport control • Programmability • Ability to deliver new behaviors not (yet) considered by standards, vendors, … • Simplified multi-layer control • Common behaviors in heterogeneous NE deployments • Operational issues • Role of SDOs • Monetizing network
- 31. Agenda Transport SDN Drivers, Needs, Challenges • Dave Brown, OIF VP of Marketing; Alcatel-Lucent Global Transport SDN Prototype Demo • Jonathan Sadler, OIF Technical Committee Vice Chair; Coriant SDN Framework and APIs • Lyndon Ong, OIF Market Awareness and Education Committee Co-Chair; Ciena Virtual Transport Network Service • Vishnu Shukla, OIF Carrier Working Group Chair; Verizon Wrap up