Haven't found this one on the Documentation yet, so thought it would be nice to post it here.
It is now possible to know which ActiveGate is an host using to send information to Dynatrace.
The other way round is also possible: is possible to get the list of hosts connected to a specific ActiveGate.
When you head over to Deployment Status, first you'll see the ActiveGate used on each host:
As you can see, when the host communicates directly with the tenant (no ActiveGate involved), the list shows "none (direct communicaton)".
When an host is communicating with an ActiveGate, not only does it show the ActiveGate's name on this view, but that name is clickable as well.
When clicked, the UI is redirected to the ActiveGate list, filtered by that ActiveGate's ID:
Either by continuing from there or access the ActiveGates list initially, there is also the way to know the list of hosts connected to each ActiveGate.
Just expand the info on a listed ActiveGate and see "Number of currently connected hosts":
As you can see, the number is also a clickable link.
When clicked, it redirects you to the host list, filtered by the selected ActiveGate:
Obviously, you do not need to rely on all these interactions to get there.
You can just access the Filters field on the OneAgents list, select "ActiveGate used by host" and manually select the ActiveGate to filter the complete host list:
So many ways to put this new info to good use!
Also, for those interested into only the current number of connections, you can use the API:
That means there is a direct communication between OneAgent and Dynatrace. If it is not communicating to ActiveGate even when it is installed, then taking OneAgent service restart will fix the communication.