SDN Solution for Service Provider Access Network Dennis Pai, Product Manager Ahmed Abeer, Technical Marketing Engineer BRKSPG-2064

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2 SDN Solution for Service Provider Access Network Dennis Pai, Product Manager Ahmed Abeer, Technical Marketing Engineer BRKSPG-2064

3 Agenda Overview and Business Drivers SDN Technologies and Protocols SDN Products and Solution Example Use Cases SDN Application Demo Summary and Conclusion 3

4 Scope of Discussion Focus on SDN technologies and solutions in the context of Service Provider IP networks Data Center and Enterprise related technologies will not be discussed See Related Sessions for more detailed information on these Cisco solutions

5 Session Objective Learn about SDN Technology Explore SDN Use Cases Understand Key Benefits

6 Overview and Business Drivers 6

Software Defined Networking Decoupled Control and Data Planes Highly Centralized Control (aka SDN Controller) Greater application interaction with the network An opportunity to re-think the

7 Software Defined Networking Decoupled Control and Data Planes Highly Centralized Control (aka SDN Controller) Greater application interaction with the network An opportunity to re-think the relationship between network hardware and software Physical Applications Control Plane Data Plane Virtual SDN Definition (ONF): The physical separation of the network control plane from the forwarding plane, and where a control plane controls several devices.

8 Network Functions Virtualization Transition of network services to run on virtualized compute infrastructure Decoupling the service from the device Elastic, consumption-based service model Purpose built appliances Servers! VNFs

9 Network Programmability Configuration Management Programmatic Interfaces Operational State Open Protocols Traffic Engineering Model Drivern Programmable Interfaces Physical and Virtual Network Infrastructure

Service Provider Market Trends The World Has

Services Changing Customer Expectations Rise

Business Value Changing Enterprise Business

10 Service Provider Market Trends The World Has Gone Mobile Massive Traffic Growth, Driven by Video 10X Mobile Traffic Growth From Ubiquitous Access to Apps & Services Changing Customer Expectations Rise of Cloud Computing M2M Driving Enterprise Business Value Changing Enterprise Business Models Efficiency & Capacity People Process Data Things Soon to Change SP Architectures/ Service Delivery Emergence of the Internet of Everything

11 OPEX Reduction is Key to Contain Cost Worldwide Service Provider CAPEX vs OPEX ($B) $1,331 $1,341 $1,299 $1,321 $1,282 $300 $313 $316 $315 $ Capex Opex Infonetics Service Provider Capex, Opex, Revenue, and Subscribers, Oct 2015

12 Cisco SP Routing Platforms ASR920 ASR9K ASR920-12SZ-IM ASR900 CRS ASR9K NCS6K NCS5000 ASR9000v NCS5000 NCS5500 CE/NID Access nv, AN, MPLS, Ethernet Preggregation MPLS Aggregation (SR, LDP, BGP, mldp, nv) MPLS (SR, LDP, BGP, mldp) Service Edge Core MPLS (SR, SRTE, mldp, BGP) Internet Gateway DCI Internet SP Data Center ASR900 ASR9K NCS5500 ASR9K NCS5500 ME1200 Access Network NCS5000

13 Access Network Characteristics Right-size Purchase Heterogeneous/Multi- Vendor Environment Simple Devices Long Installation and Setup Time Special Device Requirements

14 Cisco SDN Strategy for SPs Evolved Programmable Networks (EPN) Services MEF Services Mobile Infrastructure Business VPN Residential Services Applications Rapid Service Deployment Cloud Policer Bandwidth on Demand & Calendaring Intelligent Traffic Steering & Virtual Patch Panel Service Orchestration SDN Interfaces Packet Transport Optical Transport Open Source Controller (OSC, ODL) CLI, SNMP ME1200 ASR907/903 Orchestration, Service and Policy Implementation (NSO enabled by Tail-f) NETCONF/YANG BGP Openstack/vCenter PCEP Application Engineered Routing AER Routing, AER-TE, AER-LDP Interworking, BGP LU Physical Virtual ASR920 ASR9000v Multilayer WAN Automation Engine (WAE, AER) Service-Intent API NCS5500 NCS5000 SDN / APIs DC & NFV Controller (ESC, VTS, APIC) ASR9K NCS6K Multi Layer Manager (EPN-M) XRv-9000 CSR1Kv Multi Vendor End to End Management & Orchestration (Physical & Virtual) IPoDWDM Optical

15 SDN Technologies and Protocols 15

16 Cisco SDN Strategy for SPs Evolved Programmable Networks (EPN) Services MEF Services Mobile Infrastructure Business VPN Residential Services Applications Rapid Service Deployment Cloud Policer Bandwidth on Demand & Calendaring Intelligent Traffic Steering & Virtual Patch Panel Service Orchestration SDN Interfaces Packet Transport Optical Transport Open Source Controller (OSC, ODL) CLI, SNMP ME1200 ASR907/903 Orchestration, Service and Policy Implementation (NSO enabled by Tail-f) NETCONF/YANG BGP Openstack/vCenter PCEP Application Engineered Routing AER Routing, AER-TE, AER-LDP Interworking, BGP LU Physical Virtual ASR920 ASR9000v Multilayer WAN Automation Engine (WAE, AER) Service-Intent API NCS5500 NCS5000 SDN / APIs DC & NFV Controller (ESC, VTS, APIC) ASR9K NCS6K Multi Layer Manager (EPN-M) XRv-9000 CSR1Kv Multi Vendor End to End Management & Orchestration (Physical & Virtual) IPoDWDM Optical

17 NETCONF (or REST), YANG, and Open Config Taking Service Automation to the next level: Declarative Configuration and Model-Driven Management What is OpenConfig? Yang Management Models Applications NETCONF (or REST) YANG Modules An informal working group of network operators sharing the goal of moving our networks toward a more dynamic, programmable infrastructure declarative configuration and model-driven management and operations. The initial focus of the effort is on the development of vendor-neutral data models for configuration and management that will be supported natively on networking hardware and software platforms Network Elements YANG Modules YANG Modules YANG Modules etc MPLS BGP source: Programmatic Interfaces Control Plane / Agent Operating System Data Plane

18 Path Computation Element Protocol (PCEP) Used between head-end router and PCE to: Request/receive path from PCE subject to constraints State synchronization between PCE and router Hybrid CSPF Two current modes based on Stateful PCE initiative: PCE Initiated: App + PCE initiate tunnel setup LSP Delegation: router initiates tunnel setup (e.g. via CLI or NMS) then delegates tunnel management to PCE 1 AS PCEP PCE 6 7 AS2

information across domains Multi-hop sessions Need at minimum single BGP-LS speaker per domain Topology

19 BGP Link State (BGP-LS) Allows BGP to push IGP topology (LSDB) and resource utilization up to central SDN controller New link state address family BGP provides a familiar operational model to aggregate topology information across domains Multi-hop sessions Need at minimum single BGP-LS speaker per domain Topology information distributed from IGP into BGP (only if changed) SDN Control Domain 0 BGP-LS BGP-LS BGP-LS RR Domain 1 Domain 2

20 BGP Flow Specification (aka Flowspec) Base specification defined in IETF RFC 5575 Various extensions defined in other IETF documents (see IDR working group docs) Provides the following key capabilities: 1. Distribute ACLs via BGP, thereby, enabling rapid inter-domain distribution of flowbased traffic filters at large-scale (network wide) 2. Flow-based traffic redirection, for example, to traffic scrubber for DDoS mitigation Open Daylight Lithium release will support origination of BGP Flowspec rules Recent Cisco contribution Enables centralized policy engine to dynamically program network wide traffic filtering and steering policies via Open Daylight SDN controller REST interface Facilitates SDN-based DDoS mitigation

21 Segment Routing IP/MPLS architecture that seeks the right balance between distributed intelligence and centralized optimization and programming Drastic reduction of control-plane and hardware state Better utilization of the installed infrastructure Wide applicability: DC, WAN, Metro, Peering (end-to-end) An architecture designed with SDN in mind Unleash application-network innovation Open IETF proposed standard (SPRING working group) 21

22 Segment Identifiers

23 Segment Routing Overview C -> D -> E C -> D -> B ->E C -> D -> B ->E

24 SDN Products and Solutions 24

25 Cisco SDN Strategy for SPs Evolved Programmable Networks (EPN) Services MEF Services Mobile Infrastructure Business VPN Residential Services Applications Rapid Service Deployment Cloud Policer Bandwidth on Demand & Calendaring Intelligent Traffic Steering & Virtual Patch Panel Service Orchestration SDN Interfaces Packet Transport Optical Transport Open Source Controller (OSC, ODL) CLI, SNMP ME1200 ASR907/903 Orchestration, Service and Policy Implementation (NSO enabled by Tail-f) NETCONF/YANG BGP Openstack/vCenter PCEP Application Engineered Routing AER Routing, AER-TE, AER-LDP Interworking, BGP LU Physical Virtual ASR920 ASR9000v Multilayer WAN Automation Engine (WAE, AER) Service-Intent API NCS5500 NCS5000 SDN / APIs DC & NFV Controller (ESC, VTS, APIC) ASR9K NCS6K Multi Layer Manager (EPN-M) XRv-9000 CSR1Kv Multi Vendor End to End Management & Orchestration (Physical & Virtual) IPoDWDM Optical

Network Services Orchestrator (NSO) Management Applications REST, Java, NETCONF Service Manager Device Manager Network-wide CLI, Web UI Network Services Orchestrator (NSO) Network Element Drivers

Applications Controllers Network Engineer Service Models Device Models End-to-End Transactions Enabled by tail-f Multi-vendor service orchestrator for existing and future networks o Includes

26 Network Services Orchestrator (NSO) Management Applications REST, Java, NETCONF Service Manager Device Manager Network-wide CLI, Web UI Network Services Orchestrator (NSO) Network Element Drivers NETCONF, CLI, SNMP, REST, etc. Applications Controllers Network Engineer Service Models Device Models End-to-End Transactions Enabled by tail-f Multi-vendor service orchestrator for existing and future networks o Includes distributed (multi-device) service configuration management, transaction integrity, validation and rollback Single pane of glass for: o o o L2-L7 networking Hardware Devices Virtual Appliances YANG Model Driven Orchestration o o o Service Data models (declarative) Device Data Model (for auto config) Fastmap engine translates models to device configuration including CLI Highly Scalable for large infrastructure o One of the existing deployment is managing 60K devices on the network 26

Cisco s Open SDN Controller Cisco s Commercial Edition Of Open Daylight Pre-Installed Apps BGPLS Manager visualizes network topology

models and previews JSON API body OpenFlow Manager manages, visualizes and troubleshoots flows + previews JSON API body PCEP Manager

user, application and feature administration Status monitoring: system, cluster, node Event logging Real-time CPU, memory, disk, heap

27 Cisco s Open SDN Controller Cisco s Commercial Edition Of Open Daylight Pre-Installed Apps BGPLS Manager visualizes network topology from BGP database Inventory augmented OpenDaylight Nodes app identifies all connected devices (YANG) Model Explorer exposes system models and previews JSON API body OpenFlow Manager manages, visualizes and troubleshoots flows + previews JSON API body PCEP Manager creates, modifies and deletes MPLS LSPs One-Click Install VMware ESXi and Oracle Virtual Box hypervisor ready Centralized OA&M Robust user, application and feature administration Status monitoring: system, cluster, node Event logging Real-time CPU, memory, disk, heap size, load and network utilization metrics See also: 27

28 WAE: WAN Automation Engine Multi-Application Engine for the SP WAN Enables applications to make queries about placing demands Run demand placement and network failure simulations Request demand placement or optimization on the network WAE is really an advanced suite of network optimization, planning and calendaring capabilities which can be leveraged by applications Capabilities exposed via northbound REST/Java/Thrift APIs Traffic Management Applications REST REST/NETCONF SDN Orchestration & Control Configlet NSO ODL/OSC EMS/NMS NETCONF/PCEP/BGP-LS WAE uses topology and traffic abstraction By collecting information from the network Multi-Vendor platform Compliments NSO and Open SDN Controller (ODL) Sourc e Destination

29 Example Use Cases 29

30 Example Use Cases 1. Service Automation 2. Automated Traffic Engineering 3. Bandwidth on Demand / Calendaring 4. DDoS Mitigation 5. Agile Carrier Ethernet

31 Use Case #1 Service Automation (1/2) End-to-End Service Provisioning Across Multi-Vendor Network Partner API NSO REST NETCONF/YANG CLI Portal Homegrown Inventory DB 1. Customer adding new site to L3VPN 2. Portal or Partner REST API call to Tail-F NCS with new service parameters 3. NCS performs customer lookup and calls L3VPN service model 4. Service model contains multi-device logic which includes provisioning of backhaul circuit(s) and PE configuration 5. Service model parameters are mapped to the appropriate NCS Network Element Driver (NED) for each device in the service topology 6. NCS NED pushes configuration to devices via CLI or NETCONF/YANG Access Customer_L3VPN Backbone DC Metro Management Plane Control Plane Host OS Data Plane

32 Use Case #1 Service Automation (2/2) End-to-End Service Provisioning Across Multi-Vendor Network Partner API NSO REST NETCONF/YANG CLI Portal Homegrown Inventory DB Benefits Massive reduction in provisioning errors Customer self-selection (and automation) Developed new Flexible-VPN service offerings 10x increase in transactions vs. previous manual process Scale Ops Staff: increased services-to-engineers ratio DC Access Metro Backbone

Use Case #2 Automated Traffic Engineering Improve Capacity Management and Network Utilization (Non-Real-Time) REST MATE Apps REST REST WAN Automation Engine (WAE) (Real-Time) Application 1.

33 Use Case #2 Automated Traffic Engineering Improve Capacity Management and Network Utilization (Non-Real-Time) REST MATE Apps REST REST WAN Automation Engine (WAE) (Real-Time) Application 1. WAE and ODL continuously collect topology and traffic information 2. PCE application queries WAE for topology and traffic info 3. PCE application computes optimal load placement for traffic matrix 4. PCE application programs re-optimized load placement via WAE 5. WAE creates, modifies and/or deletes RSVP-TE tunnels or SR-TE paths as needed via ODL 6. Go back to step 2 and repeat Automated Traffic Engineering SNMP BGP-LS NETFLOW CLI PCEP NETCONF DC TE Tunnels Access Backbone Metro

34 Use Case #3 Bandwidth on Demand / Calendaring New Service and Revenue Opportunity Portal REST REST WAN Automation Engine (WAE) Application 1. WAE and ODL continuously collect topology and traffic information 2. Customer uses SP web portal to reserve bandwidth between its sites (effective immediately or at a future date and time) 3. PCE application queries WAE to verify if traffic demand can be admitted and, if so, to identify optimal paths 4. PCE application decides load placement for traffic demand 5. PCE application admits traffic demand via WAE 6. WAE admits traffic demand onto network topology which may include creation, modification and/or deletion of RSVP-TE tunnels or SR-TE paths as needed via ODL SNMP BGP-LS NETFLOW CLI PCEP NETCONF DC TE Tunnels Access Backbone Metro

35 Use Case #4 DDoS Mitigation Mitigate Security Attacks using SDN Controller DDoS Mitigation Application REST BGP Flowspec BGP Route Reflector 1. Network telemetry provides visibility to detect DoS attacks 2. Once detected, DDoS mitigation application programs attack mitigation policy using REST interface of Open Daylight SDN controller 3. Open Daylight SDN controller originates BGP flowspec rules to either filter attack or redirect attack traffic to scrubbing center 4. BGP flowspec rules are propagated to wider network (e.g., border routers) using BGP route reflector (physical or virtual) 5. Border routers install security policy to mitigate attack BGP Flowspec DC Access Backbone Metro

36 Use Case #5 Agile Carrier Ethernet (1/2) Extending Segment Routing into Carrier Ethernet Access Network 1. Simplify MPLS protocol stack: IGP + SR (no LDP, RSVP, etc.) 2. Eliminate Layer-2 Control Plane and scale challenges 3. IP Unnumbered links, zero-touch node insertion (Autonomic Networking) 4. Use SR Node Label for Intra-Area traffic 5. Use Service Node Label for Inter-Area Traffic 6. Link and Node protection with Topology Independent FRR (TiFRR) IGP Segment Routing Domain. Single IGP Area Core / Backbone Segment Routing or MPLS-TE IGP Segment Routing Domain. Single IGP Area BGP-LU Service Nodes Access Nodes Backbone SR Metro

37 Use Case #5 Agile Carrier Ethernet (2/2) Extending Segment Routing into Carrier Ethernet Access Network Partner API Portal 7. Service Topology Decoupled from SR Transport Topology 8. Controller (NSO + XRv) receives IGP topology data via BGP-LS advertisement REST 9. Controller receives Service Node Label information via BGP-LU NSO + IOS-XRv 10. Controller provisions attachment circuit parameters (EVC, QOS), and Service Node reachability (static label + FIB entry) 11. Service Node receives inbound static PW traffic, decapsulates and places in 12. Two Provisioning Touch-Points Static Label BGP-LS BGP-LU BGP-LU BGP-LS BGP-LU Static Label Customer_E-LINE SR Metro Backbone SR Metro

38 Rapid Service Deployment (RSD) Demo

39 Cisco SDN Strategy for SPs Evolved Programmable Networks (EPN) Services MEF Services Mobile Infrastructure Business VPN Residential Services Applications Rapid Service Deployment Cloud Policer Bandwidth on Demand & Calendaring Intelligent Traffic Steering & Virtual Patch Panel Service Orchestration SDN Interfaces Packet Transport Optical Transport Open Source Controller (OSC, ODL) CLI, SNMP ME1200 ASR907/903 Orchestration, Service and Policy Implementation (NSO enabled by Tail-f) NETCONF/YANG BGP Openstack/vCenter PCEP Application Engineered Routing AER Routing, AER-TE, AER-LDP Interworking, BGP LU Physical Virtual ASR920 ASR9000v Multilayer WAN Automation Engine (WAE, AER) Service-Intent API NCS5500 NCS5000 SDN / APIs DC & NFV Controller (ESC, VTS, APIC) ASR9K NCS6K Multi Layer Manager (EPN-M) XRv-9000 CSR1Kv Multi Vendor End to End Management & Orchestration (Physical & Virtual) IPoDWDM Optical

40 SP Deployment Problem Statement Introducing new access nodes and provisioning new services are costly and time consuming Service Provisioning is often a manual and vendor specific solution CLI requires expertise on user side NMS solutions are vendor specific Current processes hinder new services deployment time

Solution: Rapid Service Deployment (RSD) ODL Application Secure Zero Touch Device Activation Secure Channel

) and Configuration Download Virtual Out of Band Management Open and Multi Vendor Service Provisioning Multi-vendor

Performance Monitoring Industry StandardsY.1564, RFC 2544 and Y.

41 Solution: Rapid Service Deployment (RSD) ODL Application Secure Zero Touch Device Activation Secure Channel Discovery & Device Bootstrap (Autonomic Network) Automated Services Discovery (TFTP, AAA, Syslog etc.) and Configuration Download Virtual Out of Band Management Open and Multi Vendor Service Provisioning Multi-vendor Open API (NETCONF/YANG, REST) based Service Deployment L2VPN & L3VPN Service Provisioning Service Validation and Performance Monitoring Industry StandardsY.1564, RFC 2544 and Y.1731 PM based Network Performance Management Coexist with NMS NMS can be used for incremental configuration, element & service management after initial bootstrapping and configuration by RSD

42 RSD High Level Block Diagram P A C KA Application Services (L2VPN/L3VPN) Provisioning Image & Configuration Download (CSM) Performance Management & Topology Discovery G ED RESTCONF I N Service & Network Controller Open Daylight (ODL) Cisco NSO O NE A P P BGP LS Netconf/Yang Autonomic Configlets SNMP Physical & Virtual Devices Core Edge Access

43 RSD Business Outcome Reduced OpEx Cost Impact Traditional RSD Node Insertion $625 - $1500 $275 After RSD Greater than 56% Cost Savings Enabling 75% Reduction in Truck Rolls

44 RSD Demo

45 SR + WAE Demo

46 Demonstration Objectives In this demonstration you will experience the following: Cisco WAE acting as Controller of an MPLS Segment Routing network built with ASR 9000 and XRv devices Programmatic access to Cisco WAE requesting instantiation of traffic engineering policies in the network PCE-initiated Segment Routing Traffic Engineering (SR-TE) policies Automatic re-optimization of existing paths triggered by network topology changes

47 Demo Components APP REST APIs WAE WAN Controller PCEP BGP-LS P1 CE1 PE1 PE2 CE2 IS-IS Segment Routing IP / MPLS network P2 BGP-LS = BGP Link State PCEP = Path Computation Element Protocol

48 Initial State 0 Using MPLS labels propagated via SR ISIS extensions, traffic CE1-CE2 travels over LSP following IGP best path Lo0 SID POP (PHP) IP IP P1 IP 5 20 IP CE1 PE1 Lo0 SID PE2 Lo0 SID CE2 P2 Lo0 SID IGP metric = RED TE metric = BLUE

49 APP Request APP 1 4 WAE 2 WAE computes path meeting constraints Path found!!! In-contract == cumulative TE metric = REST API APP requests PATH PE1-PE2 with latency < 45 msec; or otherwise lowest possible when out-of-contract WAE replies to APP Path found in-contract WAE deploys path onto the network using PCEP Forwarding instructions in SR ERO: Follow IGP path to P2 then follow IGP path to PE2 P1 IP IP CE PE1 POP (PHP) PE2 Lo0 SID CE IP P2 Lo0 SID POP (PHP) IP IGP metric = RED TE metric = BLUE

50 Link Failure A (1/2) APP WAE 6 Network self-heals in less than 50-msec via IP Fast Reroute (TI-LFA) Optimal backup path IGP re-converges No controller involvement!!! CE1 IP IP PE1 POP (PHP) P IP P2 Lo0 SID POP (PHP) IP BGP-LS update sent to WAE PE2 Lo0 SID IP CE2 5 Link Fails IGP metric = RED TE metric = BLUE TI-LFA = Topology Independent Loop Free Alternate

51 Link Failure A (2/2) 9 APP WAE deploys new path onto the network Forwarding instructions in SR ERO: Follow IGP path to P2 then follow low TE metric link P2-P1 then follow IGP path to PE WAE 8 WAE reacts to topology changes Re-optimizes path in the network Path found!!! In-contract == cumulative TE metric = 40 No need to communicate to APP!!! P1 IP IP CE PE1 POP (PHP) PE2 Lo0 SID CE IP P2 Lo0 SID Adj SID IGP metric = RED TE metric = BLUE Adj SID = Adjacency SID

52 Link Failure B APP 13 WAE 11 WAE reacts to topology changes Re-optimizes path in the network Path found!!! Out-of-contract == cumulative TE metric = WAE deploys new path onto the network Forwarding instructions in SR-ERO: Follow low TE metric link PE1-P1 then follow IGP path to PE WAE replies to APP Path found out-off-contract POP (PHP) IP IP P IP CE1 PE1 Adj SID PE2 10 Second link fails CE2 P2 Lo0 SID IGP metric = RED TE metric = BLUE TI-LFA = Topology Independent Loop Free Alternate

53 Additional Information 53

54 Related Sessions BRKSDN-1119 Hitchhiker's Guide to Device APIs BRKNMS YANG Data Modeling and NETFCONF: Cisco and Industry Developments BRKGEN Autonomic Networking BRKSPG Next Generation Programmable SP/Web/OTT Routing Infrastructure for Core, Edge and DCI

55 Related Sessions LTRSDN Cisco Open SDN Controller Hands-on Lab LTRSPG Evolved Programmable Networks: Design and Orchestration DevNet Introduction to RESTCONF DevNet Introduction to Data Models and Cisco's NextGen Device Level APIs DevNet Network programming using Yang service models with Cisco Network Services Orchestrator DevNet Introduction to YANG Data Models and Their Use in OpenDaylight

56 Summary Apply SDN technologies today from core to access Leverage Cisco SDN solutions to help simplify network operations Write your own SDN application now!

57 Call to Action Visit the World of Solutions for Cisco Campus Walk in Labs Technical Solution Clinics Meet the Engineer Lunch and Learn Topics DevNet zone related sessions

Overall Conference Evaluation (available

58 Complete Your Online Session Evaluation Please complete your online session evaluations after each session. Complete 4 session evaluations & the Overall Conference Evaluation (available from Thursday) to receive your Cisco Live T-shirt. All surveys can be completed via the Cisco Live Mobile App or the Communication Stations

59 Thank you 59

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