I have been using an AP One AC Mini behind a Balance 20 and also a SOHO with very simple configurations for several months with no problems.
I recently setup a SOHO router with a VLAN for DMZ/Guest support for miscellaneous Internet of Things like webcam, smart home hubs, etc that I “do not trust”. The Internal SOHO WiFi and works flawlessly. One SSID is the main LAN and a different SSID for the VLAN (different subnet). I then enabled port type “access” and assigned Port #1 to the VLAN. This also works great and can connect some Ethernet cabled Webcams to the DMZ VLAN.
However when I connect the AP One AC Mini to the SOHO router the connecting clients can not obtain a DHCP address like the internal WIFI SSIDS can. Makes no difference if the AC Mini SSID is for the internal LAN or VLAN. Makes no difference if the AC Mini is attached to the VLAN port or to a regular LAN port. However if I turn off the VLAN Port, but leave the VLAN definition for internal WiFi SSIDs then clients connecting to the AC Mini SSIDs can get DHCP IP addresses. Does not seem to care which actual port the AC Mini is connected to. Same issue if I factory reset the AC Mini with Default settings and SSID. Then If reconnect the AC Mini to the Balance 20 or other SOHO router with no VLAN it always works.
I have spent many weeks on this problem with my retail support. They find nothing wrong. I have backed and restored the configurations. Reset factory and manually rebuild as requested. Still no solution. Please help!!!
Surf SOHO firmware is V6.3.1 build 2023
AP One AC Mini firmware is V3.5.3 build 1607