The document discusses an ONOS-based virtual tenant network (VTN) implementation. It provides an overview of the architecture, including that ONOS uses a distributed architecture to provide high availability, scalability, and performance. It also allows for linear scalability. The VTN architecture runs on top of ONOS and uses Neutron and OpenStack for management of virtual networks and tenants. It allows for VTN management and scalability, high availability, and live migration of VM hosts.

1. ONOS-based VTN
implementation
XiongYan Tang China Unicom
Patrick Liu Huawei Technologies Inc
Brian O’Connor ON.LAB

2. 2
Agenda
Requirements (XiongYan Tang)
Architecture Overview
ONOS (Brian O’Connor)
VTN (Patrick Liu)
Demo (Patrick Liu)
Scalability
HA
VM Migration

3. 3
China Unicom New Generation Network
Architecture: CUBE-Net 2.0
Application
ComponentApplication layer
API
Data-oriented Network (DoN)
Cloud
Interconnection
Customer-oriented Network (CoN)
NaaS
……
NaaS
API
Service Collaboration and Orchestration
Application
Component
Application
Component
Basic
NE
Southbound Control
East-West Integration
Northbound Openness
East-West Integration
Internet-oriented
Network (IoN)
IP + Optical network
bearing plane
① Cloud Service Access① Ubiquitous-Broadband Access ③ Ultra-Broadband Elastic Pipe
Base DC Base DC
Base DC Base DC
Regional DC
Regional DC
MAN aggregation
Mobile backhaul
Edge DC
Fixed
broadband
Ubiquitous
Access
Wireless
broadband
Mobile
broadband
④ Cloud-enabled Network
Service Platform
Virtual
Network
Resource
Management
Network
Control
Cloud
Service

4. 4
CUBE-Net: Cloud and Network Collaboration
E2E Network and Cloud Orchestration (ICT Orchestration)
SDN
Orchestrator
NFV
Orchestrator
Cloud/DC
Orchestrator
Legacy network
Orchestrator
SDN Controller VNFM VIM（NFV&DC） EMSCloud
VM
Switch/vSwitch
Router/vRouter
Service route
Access
(SDN)
Service route
WAN
(SDN)
IP Core
(SDN)
VM
API API
Application
ComponentApplication layer
Application
Component
Application
Component
Northbound interface for capability opening
Deployment
collaboration
Management
collaboration
Service
collaboration
Service chain Service chain
Edge Cloud (NFV) Regional Cloud (NFV & Cloud) Base Cloud + Third-party Cloud

5. 5
CUBE-Net: On-demand NFV Services based on
Cloud
vCPE, vBNG, vEPC, vCDN
vIMS, Video, vVAS, APP
vBBU, vOLT
VNFM, VIM, EMS
IP
device
Backbone
IP
device
IP
device
Base DC
Optical
transmission
Metro
Regional DC
Compute Network Storage
CPE
MxU
ONT
RRU
OLT
User-oriented
VNF
Control-oriented
VNF Application-oriented
VNF
Edge DC
Management cloud
Function cloud
Service cloud
Control cloud
vSwitch, vRouter
ICT Service Orchestrator
OSS, BSS, Big Data
CPE, IPRAN/ME, TSDN
controller
IP + Optical, DCI, DC
controller
1. Flattened: ultra-broadband access, one-hop reach 3. Intensive: service provisioning and orchestration2. Decoupling: control and management
Optical
transmission
Optical
transmission
Optical
transmission
IP
device
Compute Network Storage
Compute Network Storage

6. 6
Our view on NFV VIM
NFV
VIM
Scalability Open
AvailabilityAutomatic

7. 7
ONOS Distributed Architecture
NB Core API
Distributed Core
(state management, notifications, high-availability & scale-out)
SB Core API
Protocols
Providers
Protocols
Providers
Protocols
Providers
Protocols
Providers
AppsApps

8. 8
ONOS Distributed Architecture
NB Core API
Distributed Core
(state management, notifications, high-availability & scale-out)
SB Core API
Protocols
Providers
Protocols
Providers
Protocols
Providers
Protocols
Providers
AppsApps
Distributed Core
(state management, notifications, high-availability & scale-out)
SB Core API
NB Core API
Providers Providers Providers Providers
Protocols Protocols Protocols Protocols

9. 9
Architectural Tenets
• High-availability, scalability and performance
• required to sustain demands of service provider & enterprise networks
• Strong abstractions and simplicity
• required for development of apps and solutions
• Protocol and device behavior independence
• avoid contouring and deformation due to protocol specifics
• Separation of concerns and modularity
• allow tailoring and customization without speciating the code-base

10. 10
ONOS Flow and Intent Throughput
Linear Scale out
Characteristics i
Linear Scale out
Characteristics in
North bound
Source: ONOS white paper on performance
High performance
 As demands on the SDN control plane grow, either due to an increase in the size of the network or due
to an increase in the number of network control applications, ONOS can scale by adding additional
instances to the cluster. (linear scale-out characteristics in both the southbound and northbound)

11. 11
ONOS Topology (Switch, Port) Event Latency
50 and 60 ms
1 and 3 ms
5 and 7 ms
3 and 4 ms

12. 12
ONOS based VTN Architecture
OVS
Service VM
(FW)
VM
Compute Node
OVS
VMVM
Compute Node
OVS
VMVM
Compute Node
Neutron
ML2 Plugin L3 Plugin
Nova
OVSDB OF1.3
SFC Manager
Neutron API
SFC Plugin
VTN Manager
Distributed
VTN store
VTN
Overlay Net
Topology
Device
(OVS)
Host (VM)
Link
(VxLAN)
Flow Rule
Tunnel Packet Stats Master
OVS
DHCP
Network Node
DHCP
VxLAN VxLAN
Tunnel
Port
Ingress
SF Port
CORE
Provider
Egress
SF Port
Single Bridge br-int in Network and
Compute node
OF based L3 Forwarding (No DVR)
Ex Traffic is forwarded and received
directly by compute node.
ARP proxy on each compute node
Physical and Overlay Network
Flow Rule management
Full Mesh Overlay network with two
variations:
1. create two tunnel-ports per
VxLAN;
2. Create only one tunnel-ports per
OVS, which shared by all of the
VxLANs
VTN is an Application
Distributed VTN Stores
Multiple bundles
Mastership
Port
External
Port
1
2
Classifier ARP DNAT L3 FWD SNAT L2 FWD
Data path pipeline3

13. 13
Demo 1: VTN Management and Scalability
Swift Neutron Plugins
Nova
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
OVS
Server Server Server
Full Mesh
Container
OVS
VTN Tunnel FlowR
OVSDB OF1.3
Topo

14. 14
Demo 2: High Availability
Swift Neutron
Plugins
Nova
OVS 1
VMVM
OVS 2
VMVM
OVS 3
VMVM
Node 1 Node 2 Node 3
Master
Standby

15. 15
Demo 3: Host Live Migration
OVSOVS
VM2VM3 VM4VM1
Neutron Plugins Nova
VM1
Topology
Host 1
Host 1

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