While catching up on post-Explore email, I received a question from a customer who has a large number of vSAN deployments spanning their ROBO environment. In one of their environment, they had some physical congestion issue that caused some problems for their vSAN stretched cluster and they were looking for a way to monitor the vSAN congestion health, which is available as part of vSAN Health.
Since this information is available as part of vSAN Health, we can certainly leverage the vSAN Health API to retrieve this information programmatically but we can also look at using the PowerCLI Test-VsanClusterHealth cmdlet to get this information in a quicker manner for administrators.