1) Transport SDN allows for centralized control of transport networks through the use of SDN controllers and open transport switches that virtualize network resources. 2) An ESnet and Infinera demo showed how Transport SDN can set up edge-to-edge connections on demand and manage network resources through applications. 3) Transport SDN provides benefits like operational efficiency, new network services, and the ability to expand to third party services by integrating multi-layer networks, automating planning, and interfacing with virtual networking apps.

1. Transport SDN
Ping Pan, Ph.D.
March 2013

2. SDN starts in Data Center Networks
Data Center
Switch
VM
VM
VLAN
VLAN
Data Center
Switch
VM
VM
VLAN
VLAN
WAN Transport
Switch
Switch
Switch Switch
Switch
Metro
Metro
Switch
Switch
Switch
SDN
Controller

3. Current Work – SDN Cloud Gateway
Data Center
Switch
VM
VM
VLAN
VLAN
Data Center
Switch
VM
VM
VLAN
VLAN
WAN Transport
Switch
Switch
Switch Switch
Switch
Metro
Metro
Switch
Switch
Switch
SDN
Controller

4. Transport SDN is on the Horizon
Data Center
Switch
VM
VM
VLAN
VLAN
Data Center
Switch
VM
VM
VLAN
VLAN
WAN Transport
Switch
Switch
Switch Switch
Switch
Metro
Metro
Switch
Switch
Switch
SDN
Controller

5. SDN in Transport Network is NOT about…
OSMINE
• A process to ensure compatibility at each vendor
equipment level
• Cannot keep up with technology advancement
• No use in most of the networks
E-NNI
• Standardized packet-circuit network interface
• Introducing much operational overhead
• Zero deployment!
Static Circuit
Provisioning
• A traditional practice in circuit networks
• Time consuming
• Not compatible with IP applications

6. Transport SDN is about…
Network
Virtualization
Uniformed
Interface over all
Vendors
Control Plane
Overlay
Operate over
Multi-Layer
Networks
Operation
Simplicity
For Everyday
Users

7. Here is the framework…
Overlay Network
Bandwidth on
Demand
Net
Planning
Virtual
Networking
Packet Infrastructure
Transport Infrastructure Wireless Infrastructure
Offer network services
through overlay
Interface the network
through virtualization

8.  Open Transport Switch (OTS) is a light weight software switch
installed on transport switches for network resource
virtualization
 Through OTS, the SDN Controller can provision, monitor and
configure the underlying switches and networks
Support of Network Virtualization
SDN Controller
WDM/
OTN/
Packet
WDM/
OTN/
Packet
OTS OTS
Traffic Traffic
Applications

9. ESnet & Infinera SDN Demo: background
• Provide services to more than 40 DOE research sites, including the entire National
Laboratory system, its supercomputing facilities
• Connect to 140 research and commercial networks, permitting scientists to
collaborate with partners around the world
• Carry between 7 to 10 petabytes of data monthly, with traffic an average of 10 times
every 4 years

10. SDN Demo Configuration
bnl-tb-wdm-3 bnl-tb-wdm-4
40G
100G
20G 20G
20G L1 Tunnel
 SDN Controller communicating with Open Transport Switch (OTS) via OpenFlow
extensions
 Bandwidth on Demand application for Big Data transport
 3 physical transport path options (with varying latencies)
Topology Monitoring App BW on Demand App
ESnet SDN Controller
Mellanox Mellanox
Path #1
Path #2
Path #3
OTS OTS
ESnet LIMAN Production Network
Brookhaven National Laboratory
Testbed

11. Setup an Edge-to-Edge Connection from
Application

12. Manage Network Resources from Application

13. Transport SDN
OPERATION
EFFICIENCY
• Optimal edge-to-edge connection setup
• Multi-layer (L1/L2/L3) integration
• Network planning and automation
NEW NETWORK
SERVICES
• There is no end in demand of bandwidth
• DC-based enterprise requires more VPN
EXPAND TO NEW
3RD PARTY SERVICES
• Interface to virtual networking applications
• Support of real-time Big Data services
• Creation of virtual service providers