Martìn Casado CTO VMware Plenaries Session ONS2015: http://bit.ly/ons2015sd ONS Inspire! Webinars: http://bit.ly/oiw-sd Watch the talk (video) on ONS Content Archives: http://bit.ly/ons-archives-sd

3. Beyond Network Virtualization
Martìn Casado

4. Virtualization: The More We Use It, The More We Understand It…
Sophistication
Time
Server
Consolidation
Cloud

5. Agenda
Introduction to NetVirt Moving Beyond

6. What is Network Virtualization?
Internet

7. Internet
What is Network Virtualization?

8. Internet
What is Network Virtualization?

9. Internet
What is Network Virtualization?

10. Internet
What is Network Virtualization?

11. Base Use Cases
Chris Launey
Director, Cloud Hosting
The Walt Disney Company
“Fast is the new better,
Fast is the new cheaper,
Faster is the new faster!”
#1 Provisioning speed
#2 Security

12. So, Now What?

13. Visibility and Debugging

14. Basic Idea
One Complex Network Multiple Simple Networks

15. Monitoring & Troubleshooting
Virtual Networks in
Our Internal
OpenStack Cloud

16. Physical Components Health
Monitoring and Troubleshooting

17. Snapshot, Cloning, Modeling

18. Snapshot, Cloning, and Modeling
Dev/Test Environment
Update

19. Runtime Network Optimization

20. Network virtualization decouples correctness
from performance network wide.
Traditionally, these are coupled. For example, adding
a new box often means downtime and configuration changes.
Provides ability to change performance characteristics on
the fly.

21. Example: Runtime Deployment of
Distributed Routing
VM
VM
VM
VM VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM

22. Latency Impact on Production Network

23. Performance Optimization Via
Elephant Detection

24. The Problem(s)
1. Elephants cause queuing delay to latency sensitive mice
2. Hash based multipathing can lead to suboptimal
routing of elephants
(but works wonderfully for bursty mice)
• The vast majority of flows in a datacenter are small (Mice)
• The majority of packets are in large flows (Elephants)

25. Many Proposed Solutions
• Throw into separate queues
• Route Elephants differently
• Turn mice into elephants
• Send elephant on separate path
However, Detecting Elephants is Hard

26. Elephant Detection in Open vSwitch
ovs
VM VM VM
• Policy to set DSCP bits (operator input)
• Throughput tracking to set DSCP bits
• Throughput tracking to set DSCP bits, and
signal fabric from virtual network controller

27. … Just the Beginning
• MPLS integration
• Control plane federation
• Policy frameworks
• Edge-semantics to aid security
• …

28. Thank You