1. Development & Evaluation of Network Test-beds
-Vinod Kumar Rajasekaran
12/5/2018
Internet Research Group at Clemson University

2. Overview of today’s presentation
Introduction to Network Simulation
Its significance in the research community
Design issues
Problems
Related projects
My work
12/5/2018
Internet Research Group at Clemson University

3. Research in Networking
“Internet” drives today’s world
Research in Networking – Top priority
Current needs Vs Future Internet
Methods for Evaluating new network components
Direct testing
Network test-beds
12/5/2018
Internet Research Group at Clemson University

4. Internet Research Group at Clemson University
Live Testing
Real code in real environment.
Accurate measurement and experimentation
Problems:
Difficult to conduct test
Scenarios not reproducible
Possible only at the tail end of development
12/5/2018
Internet Research Group at Clemson University

5. Significance of Simulation
Requires a “thorough” understanding of existing technologies.
Provides infrastructure for developing new designs
Provides an opportunity to predict results on a “future Internet”.
Provides a reproducible scenarios
Contd…
12/5/2018
Internet Research Group at Clemson University

6. Significance of Simulation
Opportunity to explore the range of protocol designs
Cheap and easy to use
12/5/2018
Internet Research Group at Clemson University

7. Internet Research Group at Clemson University
Design goals
Research specific model
Scalability
Usability (Visualization tools)
Emulation
Models for the Future
12/5/2018
Internet Research Group at Clemson University

8. Internet Research Group at Clemson University
Design issues
Abstraction in simulation
What to abstract?
The Need!
Parallelism Vs abstraction
Issues
Critical parameters
Graph
Contd…
12/5/2018
Internet Research Group at Clemson University

9. Internet Research Group at Clemson University
Design issues
Simulation Scenario
Testing designs individually as well interactively - Imperative
-The input configuration
Network Topology
Traffic Model
Test Generation
Network Dynamics
12/5/2018
Internet Research Group at Clemson University

10. Difficulties in test-bed creation
Size of the Internet
Heterogeneity
Topology changes
Protocol differences
Traffic generation
Trace driven simulation
Traffic shaping
Congestion levels
Scaling
Growth rate of Internet graph
12/5/2018
Internet Research Group at Clemson University

11. Internet Research Group at Clemson University
Related Projects
VINT
Model Net
Net bed
NIST ….
12/5/2018
Internet Research Group at Clemson University

12. Internet Research Group at Clemson University
Model Net
Done by ISSG, Dept of CS, Duke University
Large-scale network emulator
Cluster-based emulation environment
Contd…
12/5/2018
Internet Research Group at Clemson University

13. Internet Research Group at Clemson University
Model Net
Phases
Create
GML graph
Distillation
GML Pipe
Assignment
Load balancing among cores
Bind
Load balancing VNs
Run
Contd…
12/5/2018
Internet Research Group at Clemson University

14. Internet Research Group at Clemson University
Model Net
Packet scheduling
Emulation accuracy
Routing
12/5/2018
Internet Research Group at Clemson University

15. Internet Research Group at Clemson University
My work
Long term (Thesis ideas)
Use of virtual Linux Servers for networking research
Evaluation of virtual Linux Servers for education
Immediate work
Understanding of related topics
Working with vmware
12/5/2018
Internet Research Group at Clemson University