Hello togehter, we bought a new MX250 for our new branch office and connected it via WAN1 to our ISP. We configured via the local config page WAN1 with the following settings: VLAN tagging: Use VLAN tagging VLAN ID: 7 Connection type: PPPoE Authentication: Use authentication Username: 0025909*******95511*****************@t-online.de Password: ********* IP assignment: Dynamic After a couple of minutes the MX250 is successfully online.   So far so good. Now we want to use VLANs. So we go to the dashboard and enable VLAN and leave it with the default configuration. After the config applies, the MX250 appliance is disconnected from the internet and we have absolutely no idea whats wrong. If we disable VLAN and use "Singele network", the internet connection comes up again.   What we also tried: * beta firmware update to version 15.36, without any change. * contact meraki support, which was quite useless.   Maybe someone can help us to reach out that problem.   Regards, Martin ... View more