Transport SDN Directions. March 20, 2013 Lyndon Ong Ciena

Transcription

1 Transport SDN Directions March 20, 2013 Lyndon Ong Ciena

2 SDN

3 Potential Benefits of Transport SDN SDN Benefit Transport Network Impact Network Utilization Application-aware optimization of resources Multilayer optimization across packet and circuit Improved Service Development/Deployment Greater separation of service development/deployment and network element embedded software Virtualization of network resources Simplified/Streamlined Operations Streamline and integrate operations across different domains Circumvent or remove restrictions of legacy operations systems Monetization of Resources Improved charging for network resource usage and class of service

4 Application-Aware Optimization Use Case: DC-DC Connection #1 Source: L123 SDN 2012, Chris Janz, Ciena: OpenFlow Based SDN in WAN and Carrier Networks 4

5 Network Multilayer Optimization Use Case: Multilayer Network Management Source: L123 SDN 2012, Chris Janz, Ciena: OpenFlow Based SDN in WAN and Carrier Networks 5

6 SDN Standards Activity General: SDN/OpenFlow Specifications Open Networking Foundation Appliance Virtualization Network Functions Virtualization Technology-specific activities IETF i2rs WG defining new SDN-oriented router interface Transport network standards and interoperability ONF Optical (New) Transport Working Group OpenFlow extensions for Transport OIF optical network interoperability and testing Multidomain architecture, requirements, testing

7 OF Packet Optical Interconnection Model OpenFlow OF-Config Logical Ports Physical Ports Match/Action Table Logical Ports Physical Ports Multilayer Switch Abstraction Definition of logical ports for transport tunnels Performance monitoring, alarms, protection Control channel packet_in/out Port modification of optical ports

8 OF Direct Control Openflow Controller Concept: Use OF controller to control each network element Each Network Element implements Transport OF interface and functionality Controller talks to each NE to provision connectivity Controller must be aware of detailed topology and switch technology

9 FlowVisor Model Controller Controller Existing OpenFlow Virtualization Model Controller FlowVisor Built and demonstrated at Stanford University FlowVisor Each controller sees only a slice of the network FlowVisor implements policy

10 OF Overlay/Abstract Control Openflow Controller Mediation Concept: Use OF as a programmatic interface to the transport domain Network supports Transport OF interface to client controllers over virtualized topology Network mediates client controller requests between virtual and physical topology Interface somewhat technology agnostic as details are hidden

11 Interworking SDN and Control Plane Why look at this? Interwork with deployed equipment Introduce SDN capabilities more rapidly What can be leveraged from existing work? Core control plane functions PCE Automated discovery Automated connection provisioning and recovery Centralization of topology, path computation, global view Central trigger for connection setup

12 Stateless to Stateful PCE OIF PCE IA defines usage of stateless PCE PCE maintains network topology Multiple PCEs can work together to calculate a full end-toend, multi-domain route In Stateful PCE, the PCE initiates connections PCCreate1 PCCreate 2

13 PCE and Carrier SDN SDN API Network Orchestration Layer PCE 1) PCCreate 3) PCRpt E-NNI 2) E-NNI 2.0 Signalling

14 Multilayer PCE and Carrier SDN SDN API Network Orchestration Layer Multilayer PCE 1) PCCreate 3) PCRpt E-NNI 2) E-NNI 2.0 Signalling 3)

15 SDN Architecture Issues How will Multi-domain be handled? What is the relationship between controllers? How will Multi-Layer be handled? E.g., location and triggering of adaptation What is the relationship to Network Management? OF control vs. EMS/NMS control What are scenarios for SDN implementation? Use cases of most interest to service providers

16 Possible OIF future work areas Provide carrier input for Transport SDN Identify Use Cases and Services Define Service Provider Requirements Investigate Options for Transport SDN Deployment Architecture work on Multidomain Transport SDN Impacts to E-NNI and PCE functions Note: OpenFlow will be done in ONF OIF PCE work could be extended New SDN-focused Stateful PCE Demonstration/testing of SDN Test SDN approaches using OIF methodology Driven by interest and contributions

17 Thank You!