The NS9600 Sensor currently offers the solution of stacking two Sensors to achieve scalability. The individual Sensors in the stack are interconnected using external stacking cables. Stacking Sensors creates a unified data plane view across the stack. This allows the Manager to manage the stack as a unified device. In a stack, some of the Sensor properties like signature set and call back detector update etc. are managed at the stack level and remaining like port configuration, troubleshooting etc. are managed at the device level.
Even though the data plane is unified, some Sensor properties are managed at individual Sensor level from the Manager. Each Sensor in the stack has an independent connection to the Manager. The Manager interprets the stack as a collection of individual Sensors by creating a container entity called the stack.
Based on the requirement, you can use multiple licenses of different capacities, such as 20 Gbps or 40 Gbps or 60 Gbps capacity, for a stack of 2 nodes. A total of 120 Gbps throughput license is required for a NS9600 two-node stack.