Dynamic Orchestration & Operation of Chained Network Services

Transcription

1 Dynamic Orchestration & Operation of Chained Network Services Sam Aldrin Huawei Technologies 1

2 Agenda SFC Orchestration and Operation Architecture & Solution Summary 2

3 Key challenges in Network Function Virtualization Performance & Reliability Vs Hardware Costs General Purpose Processor vs Special- purpose HW Parallel Processing, Hyper Threading, CPU cores Packet processing and RAM Architecture Eco System Integra0on Verifica0on, Valida0on, Tes0ng & Integra0on Responsibility?

4 Rich types & On-demand Use of Resources Single Chain Multiplex of several chains Service Chain1: Service Chain1: Service Chain2: Service Chain3: Multiple Chains Load Balance Service Chain1: Service Chain2: Service Chain3: Service Chain1:

5 Service Chaining Features : Ø Ø Ø Ø Ø Ø Virtualized Network Functions Dynamic addition / deletion Ø New Service Functions Programmable Traffic Steering Integration with SDN Policy driven service delivery Interoperable and standards-based l l For Internet Traffic: Parent Control For Video Traffic: Video Optimizer Ø Integration with existing infrastructure Challenges Ø Ø Visibility into use of VAS resources. Complex orchestration & manageability

6 Gi LAN Use Case SDN based flexible Architecture Rapid New Service integraoon Efficient Service Provisioning Lower Service Latency WEB GUI PCRF User Profile Enabler_1 O & M Controller Enabler_2 Enabler_3 Enabler_4 Enabler_5 2G ApplicaOon aware UMTS LTE GGSN Flow Router Service Switch 1 IP Network Service Switch 2 Gi LAN Flow Router App- aware DPI integraoon User aware PCRF interworking L3&L4 Load balancing Smart Network Controller Virtualized Environment

7 Service Chaining : Illustration DataCenter NetMatrix NetMatrix: Decoupling the logical service chain. Policy Server: Mapping of Service Chains Policy Server SNC SDN Controller (SNC): Logical service to physical resource association. vfw vcache vnfn Service Node(SN):Classification of flows and tagging chain ID/NSH to the flow packets; Service Switch BNG SN 3 User A OTN/WDM OTN/WDM OTN/WDM l Service information to Policy Server and SDN controller 1 l Policy Server: User _A = Chain ID 1 l SDN Controller: Chain ID 1 = VAS FW + Cache l Policy Server: User_A + Chain ID1 to Service Router(DPI) l SDN Controller: Flow tables to service switches. l 1 l l 3 l 4 2 User A on line Policy Server trigger DPI for User_A s traffic SNC classifies the flow and tag Chain ID 1 to User_A s traffic Service Switches forward traffic based on flow tables

8 Features Functionality Resiliency and Reliability Scalability and Security Orchestration SFC OAM Architecture Provisioning and Configuration of SF, SFP, Policy etc Verification and Validation of SF and SFC Detection and Fault Identification Performance and Scale Notifications and Alarms

9 Example SFC Layering Model NE means Network Element Service Layer Classifier SF 1 SF 2 SF 3 SF 4 SF 5 SF 6 SF 7 NE 1 NE 2 NE 3 Network Transport Link

10 SFC OAM components Service Function - To test the service functions from any SFC aware network devices (i.e. classifiers, controllers, other service nodes) Service Function Chain - To test the service function chains (SFC) and the service function paths (SFP) Classifier - To test validity of the classifiers

11 SFC OAM Functions Connectivity, Continuity & Trace Validation & Verification Performance Measurement Data Collection & Notifications Self Check, Proxy & End-to-End Operations.

12 Connectivity, Continuity & Trace FW DPI FW DPI CS SFP1 Request SFP2 Classifier NE/SFF NE/SFF NE/SFF Response Response Response Response Ø Connectivity verification of an SFP Ø Continuity check of an SFP Ø Trace the SFP and identify SF s and associated SFF 12

13 Validation and Verification FW DPI FW DPI CS SFP1 Classifier NE/SFF NE/SFF NE/SFF Validate SF Functional Verification of SF Validation of SFP FW DPI FW DPI FW DPI FW DPI SFF SFF SFF SFF 13

14 Performance, Data Collection & Notifications FW DPI FW IPS IPS DPI SFP SFF SFF SFF Performance Metrics CPU Load Packet Counters Resource Usage Jitter RTT Data Collection Local data collection On Demand poll API Notifications Pro active notification Errors and Alarms Configurable Thresholds 14

15 Packet Formats L2 header L3 header Overlay header Service header OAM Payload OAM Packet format OAM Packet as data packet Marked as OAM packet Test type Test data Trigger type Timeout Test Request Packet Format Contains more than one test request Self test or on-demand verification Service func0on Test Request Test request SF Hop count Response code Response code SF test packet format Specifies type of test Response code to indicate the status Service Function Service Function Overall response code Overall response code SF requests Multiple SF requests Test results as response codes Service Function Overall response code

16 SFC OAM Framework draft Published SFC OAM Framework draft

17 Summary SFC Functionality Resiliency Scalability Provisioning & Configuration Orchestration & Management Verification Data Collection Path Tracing Fault Isolation Validation Notifications Consistency Ø Orchestration and Management enables SFC Ø Manageability is Key element of SFC Architecture Ø True potential of SFC realized with right tooling 17

18 Thank You 18