Running into an unusual problem on a Surf SOHO MK III running firmware 7.1.1. I have successfully set up and enabled two VLANs on wireless without issue. I would like to set up an additional VLAN on one of the wired network ports (port 2 to be specific)- however when this is done, the router disconnects from the cable modem (Cisco DPC321). Rebooting both the router and the cable modem does not resolve the issue. One ethernet connected PC is connected to Port 2, which has the vlan enabled in ‘Access’ mode. The Cisco DPC321 is connected to the WAN port as expected. There are other devices connected to the wired ports as well, however none of these other devices/ports are configured for VLAN support at all.
Any advice in resolving this issue would be greatly appreciated, and if I can provide any further information to help resolve please let me know. Thank you!