Hello!,
When i have a DSA bridge called br-zigbee.
And add br-lan.52 and @trunk.52 often this works just fine, until the following scenario happen:
If the trunk interface is offline, or stopped from communicating from the other side, there is no internet.
What i would expect is that the traffic through the bridge goes over the 802.1q device, unfortunately this does not happen, so it must be some kind of priority issue, and i can confirm this if i remove the @trunk.52 device from the bridge.
For the zigbee and trunk interface i unchecked the default gateway checkbox.
Would the fix be as easy of increasing the trunks interface gateway metric ?
What would be a proper way for mixing 802.1q with the trunk devices on a DSA bridge?
Many thanks 
, Edit: oops @trunk.52 apologies for accidentally tagging you 