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Use Case Overview


Large-scale Enterprise campus networks are notoriously difficult to install and maintain. IT departments often have to wrestle with a variety of networking equipment that was purchased incrementally over several years and frequently from different vendors, creating a network that is difficult to manage because each device has its own hardware and software requirements as well as its own management point. Complexity is also a problem, since the large number of devices in the Enterprise campus network can increase hop counts and management overhead. Enterprise campus network behavior can also be unpredictable, since interconnecting devices running different software from different vendors often introduces unforeseen consequences. As an Enterprise campus network grows, the issues around installing and maintaining the Enterprise campus network only continue to compound.

Junos Fusion Enterprise addresses the installation and maintenance needs of the next-generation large-scale Enterprise campus network.

Junos Fusion Enterprise provides an architecture that simplifies Enterprise network management and topologies by allowing a large number of switches—one Junos Fusion Enterprise can support up to 6,000 access interfaces—to interconnect and be managed as a single device. The single device—the Junos Fusion Enterprise—simplifies the network topology by functioning as one large, port-dense device that supports up to 6,000 access interfaces, runs Junos OS, appears to the larger network as a single switch, and is managed from a single point using as few as one management IP address.

Other advantages of Junos Fusion Enterprise include investment protection because you can build a Junos Fusion Enterprise with equipment that you may have previously purchased for other networking purposes, enhanced scalability because switches providing additional access ports can be easily added to the Junos Fusion Enterprise as your Enterprise campus network grows, and preservation of address space since you can assign one management IP address to the entire Junos Fusion Enterprise instead of assigning management IP addresses to multiple standalone switches.

In this network configuration example, an Enterprise network with two large campus buildings and one remote branch office uses a Junos Fusion Enterprise to unite the enterprise network architecture into a single, easy-to-manage topology that appears to the larger network as one device. The Junos Fusion Enterprise topology includes a dual aggregation device setup that uses satellite device clustering in the two main campus buildings to provide an illustration of how to configure dual aggregation devices and satellite device clusters in a Junos Fusion Enterprise. A branch office that is not participating in the Junos Fusion Enterprise is also included in the Enterprise campus topology, to show how a device not participating in the Junos Fusion Enterprise topology can still participate as an access switch in an Enterprise campus network.

Junos Fusion Enterprise is typically used in large-scale Enterprise campus networks that support a large number of networking devices. The topology used in this network configuration example would only support a limited number of networking devices and would be smaller in scale than a typical Junos Fusion Enterprise setup. This smaller-scale topology was designed intentionally for readability purposes; we felt we could best exemplify the configuration concepts and procedures of a sample Junos Fusion Enterprise in a smaller-scale topology.