1. Applying CIM to SD-WAN Weiqiang Cheng, Feng Yang(CMCC)
Jin Zhou, Qilei Wang (ZTE)
把目标定义清楚

2. Outline
Definition, Purchasing Drivers and Deployment Challenges
New Features
Service Use case
Architecture
Analysis about applying CIM to SD-WAN scenario

3. SD-WAN Definition, Purchasing Drivers and Deployment Challenges
Business
Performance
Cost
Reliability
Simplicity
Agility
Software-Defined Wide Area Network (SD-WAN) is the application of software-based network technologies to WAN connections to more effectively route all network traffic between headquarters or data centers, remote and branch offices, and the cloud.
Top 5 Purchasing Drivers
Top 5 Deployment Challenges
Faster service provisioning
Ability to scale the network on-demand
Business agility to adjust to market dynamics
Ability to dynamically tailor to application needs
Lower network connectivity service costs
Current OSS/BSS systems are inadequate
Integration with legacy infrastructures
Standards are insufficient or incomplete
Network operators are strategically committed
Funding constraints for deployment

4. much more than connectivity End-to-End solution
New Features of SD-WAN
modern SD-WAN solutions have evolved to offer even broader capabilities, including:
Automation of end-to-end solution provisioning
Enterprise network modeling, network definition
Zero touch provisioning (ZTP) of on-premise devices, including establishing connectivity
Provisioning of multiple node types (spoke, hub, concentrators, etc.)
End-to-end, application-level SLAs through continuous path measurement
Dynamic application steering to counteract link degradation
End-to-end visibility and monitoring of devices, connectivity, and application performance
Intent-based policy creation to define traffic treatment
Security through Enterprise-wide policies
Multiple connection types – MPLS, Internet, LTE, etc.
Dynamic path selection, and ability to load balance across multiple WAN connections
Secure site-to-site connectivity - tunneling and VPNs
Support for 3rd-party services, such as advanced security, WAN optimization, etc.
An intuitive interface for managing WAN connections
Ability to make use of all available uplink paths
Ability to optimize use of WAN connection for cost savings
Application-aware performance monitoring over WAN links
Dynamic spoke/endpoint learning and reachability
much more than connectivity End-to-End solution

5. Service use case (from MEF)
SD-WAN Edge
Physical or Virtual
SD-WAN Gateway
between SD-WAN and CE/MPLS
SD-WAN Controller
Centralized Management of SD-WAN Edges & Gateways
Service Orchestrator
Lifecycle Service Orchestration of SD-WAN and other services
Subscriber Web Portal
Subscriber service ordering and modification

6. Architecture Comprised of four functional layers: Overlay tunnel
Underlay connectivity
physical connectivity between devices in SD-WAN
sd-wan edge(physical or virtual) located at customer branch sites
supports all the links for data traffic simultaneously
Overlay tunnel
logic tunnel connectivity between devices in SD-WAN
network segmentation
Centralized controller
central control and distribution of routing policy
service-level routing information and related location mappings
Management and orchestration
application-driven, policy-based routing management
many devices configuration templates
service automation via end-to-end operational workflows
ZTP for edge into the network

7. IMs applied in SD-WAN
The ideal way how carrier operating large scale network service:
Basic service requirements:
Service can cover common requirements with some options
Service can span across domain, region
Simplicity for network plan, operation
No vendor lock-in
Common IM proposed to achieve aforementioned goal
Physical Interface: ethernet、PON、LTE、5G、WiFi, etc
Logical Interface: e.g. LAG, VLAN sub interface, etc
IP: IP interface, ARP, Routing, VPN(VRF), VRRP, DHCP, etc
Tunnel: VxLAN, IPSec
Services: EVPN, SRv6, etc
QoS & Forwarding policy: Metering/Policing, ACL, PBR, DPI, NAT, etc
Link measurement: TWAMP, NQA
Performance & Alarm management: telemetry, alarm

8. Analysis about applying CIM to SD-WAN scenario
FD (forwarding domain) can be used to represent the possibility of setting up underlay connectivity and overlay tunnel. Multiple FD are maintained to represent various kinds of capability.
A specific FC (forwarding construct) instance would be created after bring a SD-WAN connection into service.
As the paths in one end-to-end connection maybe comprised of multiple network path segments, and these segments may belong to different administrative domain, multiple FC are concatenated together to represent an end-to-end connection.
LTP is employed to represent the termination and adaptation function at the end point of underlay connectivity and overlay tunnel.
A number of policy may be developed as the attributes of FD or FC to represent automatic capabilities of network supported, e.g., ZTP (zero touch provisioning) policy.
Gap?

9. Thank You!