SDN-based Network Virtualization. Introduction of OpenVirteX(OVX)

1. OpenVirteX
Network Hypervisor
경희대학교 Mobile Convergence Lab 한상윤(sangyun0628@khu.ac.kr)

2. Killer App for SDN
▸ Enables multi-tenancy
▸ Decouples the physical
network from the virtual
network
▸ Allows security and
isolation of the user’s traffic

3. Killer App for SDN
▸ 2013
▸ Internet2 Innovative Application Awards
▸ 2014
▸ ONS 2014, HotSDN 2014, Pre-alpha release
▸ OpenStack Neutron plugin
▸ 2016
▸ ONOS Virtualization Brigade
Make Your Virtual SDNs Programmable

4. OpenVirteX (OVX)
▸ OVX is a network virtualization platform that can create multiple
virtual and programmable networks on top of a single physical
infrastructure.
▸ Each tenant can specify their own topology, and deploy the
network OS of their choice.
▸ Networks are reconfigurable at run-time, and OVX can
automatically recover from physical network failures.

5. OpenVirteX (OVX)

6. Virtualization
Computing resources

7. Network Virtualization

8. SDN-based network virtualization
OpenFlow
OpenFlow
SDN Controller
Infrastructure

9. SDN-based network virtualization
In the context of OpenFlow and SDN, two types of network
virtualization solutions have been explored:
network slicing and overlay virtualization.

10. Virtualization Functions
▸ Topology Virtualization
▸ Address Space Virtualization
▸ Control Function Virtualization

11. Topology Virtualization
▸ Create a simpler abstraction of the network by supporting
a topology that better matches the needs of the tenant.
▸ Specify the network topology and expose it using LLDP
▸ i.e. big switch abstraction

12. Topology Virtualization

13. Topology Virtualization
OVX is responsible for mapping
the virtual network topology on to the physical network.
PhysicalVirtual Physical Virtual

14. Address Space Virtualization
▸ Each virtual network can choose its own addressing
scheme and assign addresses to end points.
▸ Overlapping IP address blocks to exist in the same
physical network.
▸ Uses unique tenant IDs
to differentiate hosts.

15. Control Function Virtualization
▸ It is responsible for mapping various control functions for
the virtual network on to the corresponding physical
network.
▸ Translate a control operation on a virtual network into
multiple actions on the physical control plane.
SDN Controller
(NOS)
Big Switch
Controll Plane
(by OpenFlow Channel)
OVX

16. A High-level View

17. A different perspective
Overlay
vs.
Underlay
Address
Virtualization
Topology
Virtualization
Control
Virtualization
Resiliency
OpenVirteX Underlay
FlowVisor Underlay
Nicira NVP Overlay

18. Resiliency
▸ Automatically recover from physical failures.
View of virtual topology

19. Install
▸ Prerequisites
• 4 Cores
• 4GB Java heap size
• 2 Cores
• 1GB Java heap size
• Git
• Oracle Java7 (Not OpenJDK, Not Java8)
• Maven
• Python 2.7.x

20. 1. Install Git / Maven / Java7
▸ $ apt-get install git
▸ $ apt-get install maven
▸ $ sudo apt-get install software-properties-common -y
▸ $ sudo add-apt-repository ppa:webupd8team/java -y
▸ $ sudo apt-get update
▸ $ sudo apt-get install oracle-java7-installer

21. 2. Clone OpenVirteX
▸ $ git clone https://github.com/OPENNETWORKINGLAB/
OpenVirteX.git -b 0.0-MAINT
▸ $ cd ~/OpenVirtex/scripts

22. 3. Start OVX
▸ $sh ovx.sh
▸ $ python ovxctl.py -n createNetwork tcp:localhost:30000
10.0.0.0 16
▸ $ python ovxctl.py -n createSwitch
DPID_1,DPID_2,DPID_3,DPID_4
<Tutorial & API Doc>
http://ovx.onlab.us/getting-started/tutorial/
http://ovx.onlab.us/documentation/api/

23. API
▸ createNetwork
▸ createSwitch DPID_1,DPID_2,DPID_3…
▸ createPort 1 DPID 1
▸ startNetwork TENANT_ID
<Tutorial & API Doc>
http://ovx.onlab.us/getting-started/tutorial/
http://ovx.onlab.us/documentation/api/

24. Big Switch
By OpenVirteX
Big switch

25. USE CASE

26. THANK YOU
Q&A
Sangyun Han