Before deploying a new network, it is wise to think how to structure the network in order to facilitate the management. For instance in the 6NET project, three network segments were defined: a core network, access networks and user/site networks. Once the management boundaries are clearly defined, other elements can be added like VLANs, DMZ, intranets etc.

The other goal to achieve during this preliminary step is to clarify the domains responsibilities for every entity involved in the network management. For instance, in the example of 6NET, the core network was under 6NET NOC responsibility, the access networks under the NREN responsibility and the user/site network under the responsibility of the network administrator of the site.