You can use Traffic Analysis, which gives you detailed insights into the types of traffic on your network, helping you identify any congestion or unusual traffic patterns.
Another way is to enable Alerts and Notifications that may indicate high utilization or errors on your switches.
Finally, Packet Capture can help you analyze traffic on specific ports or across the entire stack.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
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