I'm pretty new at this but I've learned:
- Node 01 (and 02 to 05) is your hub.
- Blue indicates the device on the horizontal axis and vertical axis are talking to each other (repeating)
- Red is not connection.
- Every device must have a "path" to the hub. I would guess the minimum number of repeaters between a device and the hub is better.
Casually looking at the "pattern" your red is far away from the hub. This should be good (as opposed to a lot of red near node 01)
The same information is on the ZWave page.
The top device in the screenshot says:
This device Goes through devices 07 then 0D then 1C then to the hub 01.
