I have problems with connectivity on my devices when using VLANs.
Setup: on Ether 5 of my RB3011UiAS there is a Ubiquiti UAC-AP-Lite Access Point connected.
My initial configuration on my Router and my AP was without any VLAN, I assigned a DHCP and a Bridge to Port 5, connected via the AP to it, obtained a proper IP and everything remained stable. Establishing connections is fast, everything feels stable. The tested devices are working as expected.
Next I’ve changed the WLAN Network on the AP and enabled VLAN and set the tag to 100 (I did not add a new one, basically the only one WLAN on this AP is now tagged)
On my router I’ve added a VLAN interface on ether5
/interface vlan
add interface=ether5 name=TrustedVLan-eth5-100 vlan-id=100
On the bridge (which is already properly set-up AFAIK) I added the new port and vlan:
/interface bridge port
add bridge=TrustedDevices interface=ether5
add bridge=TrustedDevices interface=TrustedVLan-eth5-100
When I now connect to the network the DHCP re-assigns me my IP again but on my android device I see “authenticating” etc every 2 seconds. The device gets unusable. It literally heats up and connections to any service become very unstable and very slow. (The DHCP log does not re-assign the IP to this mac, in the default log there is nothing hinting at a problem)
Another device does not re-authenticate (maybe it does but simply does not display it on that OS) but it also has massive connection drops, visiting a website takes forever (which does not when connecting this device to a different router with built-in AP, without VLAN).
There should be no collisions with other networks as the SSID is unique and as I mentioned it works properly without VLAN.