Hello, 

I have two VLANs with different networks. Both VLANs are set to untagged to only one port each. 

Both ports are now connected to one switch, where both ports are set to VLAN1 untagged, that effectively merges both networks into one broadcast-domain. (I need to to that because thats the only way to get two IPv6 networks from two providers so that all clients can use both connections, so actually what the device is designed to... load balance two providers)

But the ER7206 shouldnt switch between VLAN1 and VLAN2 so therefore the L2 domain would be seperated on the Router... but something is still switching. 

Any possible solution to that, so I can still use both IPv6 networks with the clients?