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All of these yellow circles on the map are called clusters and are completely interact-able giving you a high level view of what devices are having trouble at what location. Notice some of the clusters display 3/5, 13/19, these are indicating there are 2/5, or 6/19 devices with issues that need to be investigated. These devices could be degraded or unreachable, this view lets you quickly identify which locations need attention. For example, clicking on the cluster seemingly located in California displaying 3/5 generates the map below:
You can see by default all of the devices are stacked on top of each other, this is done on purpose since these devices are in one location and you can drag each device individually on this map. The best way to view every device is to left-click on the device, this spreads the devices out in an easier to view manner as shown below. From this view we notice there are three devices that need attention: meatball, midgard, sf-server1.
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Clicking on the device "meatball' generates the image below - you can see this device is degraded, clicking on the device name in this popup window will open the devices Nodes detail page in opCharts allowing for quick investigation into events that may have caused it to become degraded.
