I have an application which is using many cRIO 9074 devices to collect real-time test data on several hundred units under test. In general, it runs without issue and is a very stable application. The cRIO's all have static IP addresses that a LabVIEW application reads and records the data from. From time to time we will experience an issue where all of the cRIO's in our facility (30+) will stop talking on the network at the same time We are unable to talk to them through MAX and cannot ping them. We can get everything working again by resetting the power to the cRIO's which re-establishes their connection to the network at the assigned IP and testing can be restarted, but this causes significant disruption as it takes a significant amount of time to reset everything and get restarted and we are unable to complete tests that have been running for several hours. It's curious because we similarly have serial server devices paired with each cRIO, that also have static IP addresses. When these events take place, we do not lose the connections to the serial server devices. We are working with our IT group to see if there is anything that they are aware of that could be causing this network disruption but have not had any promising results from that search at this point. Any idea or thoughts about what we are seeing would be helpful.
