Community-Lab introduction

- Each node is able to run several experiments simultaneously.
- An experiment runs in a given node as a sliver which holds a share of its
  resources (CPU, memory, disk, bandwidth, interfaces…).
- Finally, related slivers are grouped in a slice for management purposes.
- All these concepts are inspired in PlanetLab. *##*

** Node architecture
allows the realization of these concepts.  *##* A node consists of a CD, a RD
and a rD connected to the same wired local network.
allows the realization of these concepts.  *##* A node is a RD connected to a CN
through the wired local network of a CD.

- The community device
  - Completely normal CN device, so existing ones can be used.
  - routes traffic between the CN and the local network (which runs no routing
    protocol).
- The research device
  - Usually more powerful than CD, since experiments run here.