Summary

This chapter covered a lot of ground. The basic idea is that there are different levels of virtualization: device, data path, and control path. There are different constructs and protocols to implement for each of these, and, depending on the problem you need to solve, you can combine these to arrive at an overall network design.

This chapter avoided all discussion of architecture, the better to focus on protocol and implementation details. The next chapter covers hub-and-spoke and RFC 2547 architectures.