VPN A “cloud view”

Figure 8 shows the screen of the management console that we have implemented for customermanagement of a VPG-based VPN service. Both layers of the VPN are visible. The upperlayer represents the VP network, the lower layer the VPG network. The vertical bars on the VPnetwork show the current utilization of the VPs. The three segments of a particular bar correspond to the three traffic classes supported in our particular system. The outline of the cylinders indicate the currently allocated VP capacities. The vertical bars on the VPG network givethe allocation of the VPG bandwidth to the VPs. A "cloud view" on the lower left cornershows the number of active calls in the VPs. Each axis corresponds to a traffic class. In thisspecific snapshot, one can see that two of the VPs experience a much higher load than the others. The interface in Figure 8 allows an operator to perform management operations andobserve the reaction of these operations on the global state of the system.