I have an AP One AC Mini Connected to a SOHO MK4 trunked port.
The AP offers several SSIDs, all on different VLANs:
SSID1 VLAN=10, also AP’s management VLAN.
SSID2 VLAN=20
SSID3 VLAN=30
SSID1 cannot connect (gets no IP). SSID2 and SSID3 work as expected. The AP gets an address on VLAN 10 and replies to ping (although the SOHO typically shows the connection broken). AP mode is bridged. Wireless connections to VLAN 10 via the SOHO (which also has an SSID for VLAN 10, current different to diagnose) work as expected.
What’s preventing SSID1 clients from connecting through the AP?