Link aggregation is a method used to combine multiple network connections in parallel to increase throughput and provide redundancy in case one of the links fail. This feature is used in network appliances, including FortiAnalyzer, to add redundancy to the network connections, ensuring that there is a backup path for traffic if the primary path becomes unavailable.
Reference: The FortiAnalyzer 7.4.1 Administration Guide explains the concept of link aggregation and its relevance to