So I wanted to set up two Vlans on my switch, and a trunk through my router in order to reach the internet, but after I've configurated the subinterfaces on the router, neither of them will go up and form a link with the trunk port. I'm not sure why ...

So I'm attempting to configure a loopback address on my Cisco cat-3850 Switch to be pingable on a host PC. The devices are already connected via an Ethernet cord and despite the fact that, if the Switch goes through to the Router, it can reach the in...