I've got one last question regarding VLAN PVIDs. I'm not sure how they work. In therorie it is the primary VLAN and every traffic goes to there - e.g. if multiple devices connected to untagged ports in the VLAN the default is routing all untagged traffic to this VLAN.
But if I only have 2 VLANs and no tagging at all on the switch or router ports like here in this tutorial, do I even need the PVID? Does it have any benefits or downsides?
Thanks 