Principles of a Virtual Network

This pages lists discussions items about what are properties of a Virtual Network.

What's a network in here

  • A set of routers, hosts, links, services (e.g., name mapping services) or switches and the interconnection thereof.
  • A VN includes all of them, i.e., it spans from end-to-end including end hosts.

Multiple Concurrent Network Instances

The ability to run multiple concurrent network instances on the same underlying network resource. This network resource can be a physical network or already be an virtual network.

Network to Network Isolation

  • The VN instances are clearly isolated from each other.
  • Fault isolation: contain a VN's fault within this VN.
  • Accountability: who did what?


A given virtual resource (host, link, router, service) does not need to directly correspond to its component resources.

Forms of abstraction

  • Aggregation: Aggregation of multiple resource to achieve increased robustness or throughput.
  • Resource Sharing: Splitting a single (physical/underlying) resource to support multiple network instances.



Independenceof Naming and Addressing

Business Aspects

Various roles:

  • infrastructure provider: providing real hardware
  • virtual network provider: providing the networking service
Last modified 9 years ago Last modified on Oct 21, 2010, 7:01:18 AM