- Yes.
- 18m separate floors.
Presently node 2 is off. Define too many/too close together with references. I am unable to find anything in Asus manuals that defines a minimum distance.
It's like they are acting as separate APs with the same SSID and not Mesh with client management logic.
18m/60ft apart is a fair distance, depending on signal strength and path, and any obstacles to radio propagation.
Generally speaking, you want the weaker 5.0 signals to overlap a bit at some 'midpoint' dBm power level so that the client has a decent roaming choice as its current connection fades in strength past the 'halfway there' point. The client decides when to roam, subject to whatever roaming standards are implemented in the client and the node, if any (I don't know this for your equipment).
There is also Roaming Assistant (RSSI signal power dBm threshold per band) in the firmware that is suppose to 'encourage' a client to roam when its connection signal power drops below the RSSI threshold... more negative (node steering).
And Smart Connect that is suppose to encourage the client to connect to the better node band/signal when using the same SSID for all bands (node band steering).
One approach is to simplify and see how your clients behave on their own for the given radio layout. So, disable RA and SC and define different SSIDs per band and connect your client to the preferred band/SSID. Then you can focus on what the client is deciding relative to the radio layout... you may decide to move the nodes farther apart or remove a node (too much radio). You can later return to using RA and/or SC, or not. RA encourages sticky clients to roam, but first you want to be sure of your radio layout before tuning the RA RSSI threshold. A WiFi Analyzer app is handy for 'seeing' all ambient WiFi signals and their rough power level at various points.
Note that wired locations are not necessarily the best node/radio transmitter locations... except in commercial buildings that are engineered in advance before being wired for APs, and then the APs may be tuned power-wise upon installation.
Since the client decides when to roam, consider any client network adapter settings that might influence this decision. For clients that you maintain, consider updating the OEM driver, if not current.
OE