@JamesSolomon 

To see where Satellite Deco is connected to, open Deco app, touch the Globe, you should see the list of all Deco nodes in your Deco mesh. Touch Deco node in that list that you want to get info about, a new page will open with info for that specific Deco node.

In that page, look for "Signal Source," it will tell you where connection goes and with what quality. Example from my Satellite Deco M9:

In this example, my Satellite M9 is connected to Main Deco M9 which I named "Living Room," with excellent quality of connection between them.

------------

You can also see the full map of your Deco mesh connectivity through Deco mesh Web interface. It should be available by opening IP address of Main Deco in Web browser. There will be login screen that looks like this:

You'll have to enter same password you use to login to Deco app.

Example from Web interface:

In this example, all three Satellite Deco connected to Main Deco.

  @Alexandre. 

Thanks very much for the reply, but I cannot seem to see what you are suggesting.

1. I open Deco app
2. Touch the Globe
3. I see the list of all Deco nodes in the Deco mesh
4. I touch the Deco node in list that I want to get info about
5. A new page opens
6. All the is on that page, is 'Deco Health Check --> Deco is working well'

Is there something I'm doing wrong?

  @JamesSolomon 

It is possible you have older version of Deco firmware. With previous versions of Deco firmware, you may see 'Deco Health Check --> Deco is working well' when no devices are connected to that Deco. When there is at least one device connected to that Deco node, you'll see detailed info. 

The workaround is to connect something to that Deco node, wirelessly or wired to Ethernet port.

I would suggest you check if your Deco nodes firmware can be upgraded to newer version. In Deco app, open More/Update Deco and see what version of Deco M9 Plus is there and also if updates are available. 

  @JamesSolomon 

One more thing:  try http://192.168.68.1/

  @David-TP 

Thanks for this. I downloaded the software and .bin on my laptop, and deployed the new firmware. So far so good and I csn see which other access pointsthey are routing through.. Except two of my access points still seem to be on the 'old' firmware. Is there a way to update these manually? 

I can't seem to connect to http://192.168.68.1 or .100 or .101 .. not sure if there is a another way to view this information?

Also, I updated my Operation Mode from 'Wireless Router' to 'Access Point'.. Do you think that is wise?

Thanks for all the help so far, everyone!

Ok

I reinstalled the firmware on all the devices (installed the firmware twice) using the upgrade tool, and now all the devices are on the same (latest) firmware, and the network looks good.

Holding thumbs that this allows me to diagnose (if still a problem) any network speed issues.

Thanks for all the help, everyone!