High-Fanout Second-Tier Networks

You can use border routers to construct a high-fanout network, like the standard reference architecture in Border Router: High-Fanout Network.

Within an enterprise, this architecture can promote network stability, use network bandwidth efficiently, and effectively control the flow of data.

When this architecture spans several enterprises, distribution-level border routers can isolate each enterprise network within a separate zone. With appropriate policy configuration, this architecture addresses privacy issues among partners in business-to-business applications.

Figure 80: Border Router: High-Fanout Network