cnMaestro Latency Test

The latency test always fail under the section of "Manage->Some Device->Tools", all the management traffic is on a VLAN which cnMaestro has complete access, what does the problem could be?, any hints are appretiated. Also there is a "DN" icon in red and I have not idea what it means.

I have attached an image with the problem in question.


I’ve the same question/issue, Any thoughts on this?