I have 4 801NDs hooked up to a Cisco 110 firewall. They all have unique SSIDs and are set to different static IPs. IP addresses set to be assigned by the firewall. Operating on 10.10.10.x.

I have about 15-20 clients (Sonoff ESP8266s) on each AP.

This setup reliablely crashes the whole network, as I bring the clients of the various APs on line. Sequence doesn't seem to matter. It seems legit ad dependent.

Any idea what could be going on?

How does the Smart IP option work? Would it help using that, instead of Static IP and having the AP assign IPs? How would we assure unique IPs that way?

Thanks for your help.