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QRadar Network Insights Appliance Stacking

SUMMARY You can stack QRadar Network Insights appliances to scale performance by load balancing the network packet data across multiple appliances. By distributing the data processing and analysis, stacked appliances can help you handle higher data volumes and improve flow throughput performance at the highest inspection levels.

Only the QRadar Network Insights 1920 (type 6200) and QRadar Network Insights 1940 (type 6600) appliances can be stacked. All appliances in the stack must be the same type. You cannot have both 1920 and 1940 appliances in the same stack.

You can have more than one stack in a deployment, and each stack can have a maximum of four appliances. If any of the appliances in the stack experience a failure and becomes unavailable, the entire stack is impacted. For example, if the first appliance in a stack has a hardware failure, the data is not received by the rest of the stacked appliances.

You cannot stack the QRadar Network Insights 1901 appliance, and you cannot stack appliances in a software installation.